docs-nodejs/assert.html

<!DOCTYPE html><html lang="en"><head>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width">
  <title>Assert | Node.js v12.10.0 Documentation</title>
  <link rel="stylesheet" href="data:text/css;base64,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">
  <link rel="stylesheet" href="data:text/css;base64,/*--------------------- Layout and Typography ----------------------------*/
html {
  font-size: 1rem;
  overflow-wrap: break-word;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  -webkit-font-variant-ligatures: none;
          font-variant-ligatures: none;
}

* {
  box-sizing: border-box;
}

body {
  font-family: "Lato", "Lucida Grande", "Lucida Sans Unicode", "Lucida Sans", Verdana, Tahoma, sans-serif;
  margin: 0;
  padding: 0;
  color: #333;
  background: #fff;
}

h1 { font-size: 2.5rem }
h2 { font-size: 2rem }
h3 { font-size: 1.75rem }
h4 { font-size: 1.5rem }
h5 { font-size: 1.25rem }
h6 { font-size: 1rem }

h1, h2, h3, h4, h5, h6 {
  margin: 1.5rem 0 1rem;
  text-rendering: optimizeLegibility;
  font-weight: 700;
  position: relative;
}

pre, tt, code, .pre, span.type, a.type {
  font-family: SFMono-Regular, Menlo, Consolas, "Liberation Mono", "Courier New", monospace;
  font-size: .9em;
}

#content {
  position: relative;
}

a, a:link, a:active {
  color: #43853d;
  text-decoration: none;
  border-radius: 2px;
  padding: 1px 3px;
}

a:hover, a:focus {
  color: #fff;
  background-color: #43853d;
  outline: none;
}

strong {
  font-weight: 700;
}

code a:hover {
  background: none;
}

em code {
  font-style: normal;
}

#changelog #gtoc {
  display: none;
}

#gtoc {
  margin-top: .5rem;
  margin-bottom: 1rem;
}

#gtoc ul {
  list-style: none;
  margin-left: 0;
  line-height: 1.5rem;
}

#gtoc > ul > li {
  display: inline;
  border-right: 1px #000 solid;
  margin-right: 0.4rem;
  padding-right: 0.4rem;
}

#gtoc > ul > li:last-child {
  border-right: none;
  margin-right: 0;
  padding-right: 0;
}

li.version-picker {
  position: relative;
}

li.version-picker:hover > a {
  border-radius: 2px 2px 0 0;
}

li.version-picker:hover > ol {
  display: block;
  z-index: 1;
}

li.version-picker a span {
  font-size: .7rem;
}

ol.version-picker {
  background: #fff;
  border: 1px #43853d solid;
  border-radius: 0 0 2px 2px;
  display: none;
  list-style: none;
  position: absolute;
  right: 0;
  top: 1.25rem;
  width: 100%;
}

#gtoc ol.version-picker li {
  display: block;
  border-right: 0;
  margin-right: 0;
}

ol.version-picker li a {
  border-radius: 0;
  display: block;
  margin: 0;
  padding: .1rem;
  padding-left: 1rem;
}

ol.version-picker li:last-child a {
  border-bottom-right-radius: 1px;
  border-bottom-left-radius: 1px;
}

.line {
  width: calc(100% - 1rem);
  display: block;
  padding-bottom: 1px;
}

.api_stability {
  color: white !important;
  margin: 0 0 1rem 0;
  font-family: "Lato", "Lucida Grande", "Lucida Sans Unicode", "Lucida Sans", Verdana, Tahoma, sans-serif;
  padding: 1rem;
  line-height: 1.5;
}

.api_stability * {
  color: white !important;
}

.api_stability a {
  text-decoration: underline;
}

.api_stability a:hover, .api_stability a:active, .api_stability a:focus {
  background: rgba(255, 255, 255, .4);
}

.api_stability a code {
  background: none;
}

.api_stability_0 {
  background-color: #D60027;
}

.api_stability_1 {
  background-color: #EC5315;
}

.api_stability_2 {
  background-color: #4EBA0F;
}

.api_metadata {
  font-size: .85rem;
  margin-bottom: 1rem;
}

.api_metadata span {
  margin-right: 1rem;
}

.api_metadata span:last-child {
  margin-right: 0px;
}

ul.plain {
  list-style: none;
}

abbr {
  border-bottom: 1px dotted #454545;
}

p {
  text-rendering: optimizeLegibility;
  margin: 0 0 1.125rem 0;
  line-height: 1.5;
}

#apicontent > *:last-child {
  margin-bottom: 0;
  padding-bottom: 2rem;
}

table {
  border-collapse: collapse;
  margin: 0 0 1.5rem 0;
}

th, td {
  border: 1px solid #aaa;
  padding: .75rem 1rem .75rem 1rem;
  vertical-align: top;
}

th {
  text-align:left;
}

ol, ul, dl {
  margin: 0 0 .6rem 0;
  padding: 0;
}

ol ul, ol ol, ol dl, ul ul, ul ol, ul dl, dl ul, dl ol, dl dl {
  margin-bottom: 0;
}

ul, ol {
  margin-left: 2rem;
}

dl dt {
  position: relative;
  margin: 1.5rem 0 0;
}

dl dd {
  position: relative;
  margin: 0 1rem 0;
}

dd + dt.pre {
  margin-top: 1.6rem;
}

#apicontent {
  padding-top: 1rem;
}

#apicontent .line {
  width: calc(50% - 1rem);
  margin: 1rem 1rem .95rem;
  background-color: #ccc;
}

h2 + h2 {
  margin: 0 0 .5rem;
}

h3 + h3 {
  margin: 0 0 .5rem;
}

h2, h3, h4, h5 {
  position: relative;
  padding-right: 40px;
}

.srclink {
  float: right;
  font-size: smaller;
}

h1 span, h2 span, h3 span, h4 span {
  position: absolute;
  display: block;
  top: 0;
  right: 0;
}

h1 span:hover, h2 span:hover, h3 span:hover, h4 span:hover {
  opacity: 1;
}

h1 span a, h2 span a, h3 span a, h4 span a {
  color: #000;
  text-decoration: none;
  font-weight: bold;
}

pre, tt, code {
  line-height: 1.5rem;
  margin: 0; padding: 0;
}

.pre {
  line-height: 1.5rem;
}

pre {
  padding: 1rem;
  vertical-align: top;
  background: #f2f2f2;
  margin: 1rem;
  overflow-x: auto;
}

pre > code {
  padding: 0;
}

pre + h3 {
  margin-top: 2.225rem;
}

code.pre {
  white-space: pre;
}

#intro {
  margin-top: 1.25rem;
  margin-left: 1rem;
}

#intro a {
  color: #ddd;
  font-weight: bold;
}

hr {
  background: none;
  border: medium none;
  border-bottom: 1px solid #7a7a7a;
  margin: 0 0 1rem 0;
}

#toc h2 {
  margin-top: 0;
  margin: 1.5rem 0;
}

#toc p {
  margin: 0;
}

#toc ul a {
  text-decoration:none;
}

#toc ul li {
  margin-bottom: .666rem;
  list-style: square outside;
}

#toc li > ul {
  margin-top: .666rem;
}

#toc .stability_0::after {
  background-color: #d50027;
  color: #fff;
  content: "deprecated";
  margin-left: .25rem;
  padding: 1px 3px;
  border-radius: 3px;
}

#apicontent li {
  margin-bottom: .5rem;
}

#apicontent li:last-child {
  margin-bottom: 0;
}

tt, code {
  color: #040404;
  background-color: #f2f2f2;
  border-radius: 2px;
  padding: 1px 3px;
}

.api_stability code {
  background: rgba(0, 0, 0, .1);
}

a code {
  color: inherit;
  background: inherit;
  padding: 0;
}

.type {
  line-height: 1.5rem;
}

#column1.interior {
  margin-left: 234px;
  padding: 0 2rem;
  -webkit-padding-start: 1.5rem;
}

#column2.interior {
  width: 234px;
  background: #333;
  position: fixed;
  left: 0;
  top: 0;
  bottom: 0;
  overflow-x: hidden;
  overflow-y: scroll;
}

#column2 ul {
  list-style: none;
  margin: .9rem 0 .5rem;
  background: #333;
}

#column2 > :first-child {
  margin: 1.25rem;
  font-size: 1.5rem;
}

#column2 > ul:nth-child(2) {
  margin: 1.25rem 0 .5rem;
}

#column2 > ul:last-child {
  margin: .9rem 0 1.25rem;
}

#column2 ul li {
  padding-left: 1.25rem;
  margin-bottom: .5rem;
  padding-bottom: .5rem;
}

#column2 .line {
  margin: 0 .5rem;
  background-color: #707070;
}

#column2 ul li:last-child {
  margin-bottom: 0;
}

#column2 ul li a {
  color: #ccc;
  border-radius: 0;
}

#column2 ul li a.active, #column2 ul li a.active:hover,
#column2 ul li a.active:focus {
  color: #43853d;
  border-radius: 0;
  border-bottom: 1px solid #43853d;
  background: none;
}

#intro a:hover, #intro a:focus,
#column2 ul li a:hover, #column2 ul li a:focus {
  color: #fff;
  background: none;
}

span > .mark, span > .mark:visited {
  color: #707070;
  position: absolute;
  top: 0px;
  right: 0px;
}

span > .mark:hover, span > .mark:focus, span > .mark:active {
  color: #43853d;
  background: none;
}

th > *:last-child, td > *:last-child {
  margin-bottom: 0;
}

.changelog > summary {
  margin: .5rem 0;
  padding: .5rem 0;
  cursor: pointer;
}

/* simpler clearfix */
.clearfix:after {
  content: ".";
  display: block;
  height: 0;
  clear: both;
  visibility: hidden;
}

.github_icon {
  vertical-align: middle;
  margin: -2px 3px 0 0;
}

@media only screen and (max-width: 1024px) {
  #content {
    overflow: visible;
  }
  #column1.interior {
    margin-left: 0;
    padding-left: .5rem;
    padding-right: .5rem;
    width: auto;
    overflow-y: visible;
  }
  #column2 {
    display: none;
  }
}

@media print {
  html {
    height: auto;
    font-size: 0.75em;
  }
  #column2.interior {
    display: none;
  }
  #column1.interior {
    margin-left: 0px;
    padding: 0px;
    overflow-y: auto;
  }
  .api_metadata,
  #toc,
  .srclink,
  #gtoc,
  .mark {
    display: none;
  }
  h1 {
    font-size: 2rem;
  }
  h2 {
    font-size: 1.75rem;
  }
  h3 {
    font-size: 1.5rem;
  }
  h4 {
    font-size: 1.3rem;
  }
  h5 {
    font-size: 1.2rem;
  }
  h6 {
    font-size: 1.1rem;
  }
  .api_stability {
    display: inline-block;
  }
  .api_stability a {
    text-decoration: none;
  }
  a {
    color: inherit;
  }
  #apicontent {
    overflow: hidden;
  }
}
">
  <link rel="stylesheet" href="data:text/css;base64,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">
  <link rel="canonical" href="https://nodejs.org/api/assert.html">
</head>
<body class="alt apidoc" id="api-section-assert">
  <div id="content" class="clearfix">
    <div id="column2" class="interior">
      <div id="intro" class="interior">
        <a href="https://nodejs.org/" title="Go back to the home page">
          Node.js
        </a>
      </div>
      <ul>
<li><a href="https://nodejs.org/api/documentation.html" class="nav-documentation">About these Docs</a></li>
<li><a href="https://nodejs.org/api/synopsis.html" class="nav-synopsis">Usage &amp; Example</a></li>
</ul>
<div class="line"></div>
<ul>
<li><a href="https://nodejs.org/api/assert.html" class="nav-assert active">Assertion Testing</a></li>
<li><a href="https://nodejs.org/api/async_hooks.html" class="nav-async_hooks">Async Hooks</a></li>
<li><a href="https://nodejs.org/api/buffer.html" class="nav-buffer">Buffer</a></li>
<li><a href="https://nodejs.org/api/addons.html" class="nav-addons">C++ Addons</a></li>
<li><a href="https://nodejs.org/api/n-api.html" class="nav-n-api">C/C++ Addons - N-API</a></li>
<li><a href="https://nodejs.org/api/child_process.html" class="nav-child_process">Child Processes</a></li>
<li><a href="https://nodejs.org/api/cluster.html" class="nav-cluster">Cluster</a></li>
<li><a href="https://nodejs.org/api/cli.html" class="nav-cli">Command Line Options</a></li>
<li><a href="https://nodejs.org/api/console.html" class="nav-console">Console</a></li>
<li><a href="https://nodejs.org/api/crypto.html" class="nav-crypto">Crypto</a></li>
<li><a href="https://nodejs.org/api/debugger.html" class="nav-debugger">Debugger</a></li>
<li><a href="https://nodejs.org/api/deprecations.html" class="nav-deprecations">Deprecated APIs</a></li>
<li><a href="https://nodejs.org/api/dns.html" class="nav-dns">DNS</a></li>
<li><a href="https://nodejs.org/api/domain.html" class="nav-domain">Domain</a></li>
<li><a href="https://nodejs.org/api/esm.html" class="nav-esm">ECMAScript Modules</a></li>
<li><a href="https://nodejs.org/api/errors.html" class="nav-errors">Errors</a></li>
<li><a href="https://nodejs.org/api/events.html" class="nav-events">Events</a></li>
<li><a href="https://nodejs.org/api/fs.html" class="nav-fs">File System</a></li>
<li><a href="https://nodejs.org/api/globals.html" class="nav-globals">Globals</a></li>
<li><a href="https://nodejs.org/api/http.html" class="nav-http">HTTP</a></li>
<li><a href="https://nodejs.org/api/http2.html" class="nav-http2">HTTP/2</a></li>
<li><a href="https://nodejs.org/api/https.html" class="nav-https">HTTPS</a></li>
<li><a href="https://nodejs.org/api/inspector.html" class="nav-inspector">Inspector</a></li>
<li><a href="https://nodejs.org/api/intl.html" class="nav-intl">Internationalization</a></li>
<li><a href="https://nodejs.org/api/modules.html" class="nav-modules">Modules</a></li>
<li><a href="https://nodejs.org/api/net.html" class="nav-net">Net</a></li>
<li><a href="https://nodejs.org/api/os.html" class="nav-os">OS</a></li>
<li><a href="https://nodejs.org/api/path.html" class="nav-path">Path</a></li>
<li><a href="https://nodejs.org/api/perf_hooks.html" class="nav-perf_hooks">Performance Hooks</a></li>
<li><a href="https://nodejs.org/api/policy.html" class="nav-policy">Policies</a></li>
<li><a href="https://nodejs.org/api/process.html" class="nav-process">Process</a></li>
<li><a href="https://nodejs.org/api/punycode.html" class="nav-punycode">Punycode</a></li>
<li><a href="https://nodejs.org/api/querystring.html" class="nav-querystring">Query Strings</a></li>
<li><a href="https://nodejs.org/api/readline.html" class="nav-readline">Readline</a></li>
<li><a href="https://nodejs.org/api/repl.html" class="nav-repl">REPL</a></li>
<li><a href="https://nodejs.org/api/report.html" class="nav-report">Report</a></li>
<li><a href="https://nodejs.org/api/stream.html" class="nav-stream">Stream</a></li>
<li><a href="https://nodejs.org/api/string_decoder.html" class="nav-string_decoder">String Decoder</a></li>
<li><a href="https://nodejs.org/api/timers.html" class="nav-timers">Timers</a></li>
<li><a href="https://nodejs.org/api/tls.html" class="nav-tls">TLS/SSL</a></li>
<li><a href="https://nodejs.org/api/tracing.html" class="nav-tracing">Trace Events</a></li>
<li><a href="https://nodejs.org/api/tty.html" class="nav-tty">TTY</a></li>
<li><a href="https://nodejs.org/api/dgram.html" class="nav-dgram">UDP/Datagram</a></li>
<li><a href="https://nodejs.org/api/url.html" class="nav-url">URL</a></li>
<li><a href="https://nodejs.org/api/util.html" class="nav-util">Utilities</a></li>
<li><a href="https://nodejs.org/api/v8.html" class="nav-v8">V8</a></li>
<li><a href="https://nodejs.org/api/vm.html" class="nav-vm">VM</a></li>
<li><a href="https://nodejs.org/api/worker_threads.html" class="nav-worker_threads">Worker Threads</a></li>
<li><a href="https://nodejs.org/api/zlib.html" class="nav-zlib">Zlib</a></li>
</ul>
<div class="line"></div>
<ul>
<li><a href="https://github.com/nodejs/node" class="nav-https-github-com-nodejs-node">GitHub Repo &amp; Issue Tracker</a></li>
</ul>
    </div>

    <div id="column1" data-id="assert" class="interior">
      <header>
        <h1>Node.js v12.10.0 Documentation</h1>
        <div id="gtoc">
          <ul>
            <li>
              <a href="https://nodejs.org/api/index.html" name="toc">Index</a>
            </li>
            <li>
              <a href="https://nodejs.org/api/all.html">View on single page</a>
            </li>
            <li>
              <a href="https://nodejs.org/api/assert.json">View as JSON</a>
            </li>
            
    <li class="version-picker">
      <a href="#">View another version <span>▼</span></a>
      <ol class="version-picker"><li><a href="https://nodejs.org/docs/latest-v12.x/api/assert.html">12.x</a></li>
<li><a href="https://nodejs.org/docs/latest-v11.x/api/assert.html">11.x</a></li>
<li><a href="https://nodejs.org/docs/latest-v10.x/api/assert.html">10.x <b>LTS</b></a></li>
<li><a href="https://nodejs.org/docs/latest-v9.x/api/assert.html">9.x</a></li>
<li><a href="https://nodejs.org/docs/latest-v8.x/api/assert.html">8.x <b>LTS</b></a></li>
<li><a href="https://nodejs.org/docs/latest-v7.x/api/assert.html">7.x</a></li>
<li><a href="https://nodejs.org/docs/latest-v6.x/api/assert.html">6.x</a></li>
<li><a href="https://nodejs.org/docs/latest-v5.x/api/assert.html">5.x</a></li>
<li><a href="https://nodejs.org/docs/latest-v4.x/api/assert.html">4.x</a></li>
<li><a href="https://nodejs.org/docs/latest-v0.12.x/api/assert.html">0.12.x</a></li>
<li><a href="https://nodejs.org/docs/latest-v0.10.x/api/assert.html">0.10.x</a></li></ol>
    </li>
  
            <li class="edit_on_github"><a href="https://github.com/nodejs/node/edit/master/doc/api/assert.md"><span class="github_icon"><svg height="16" width="16" viewBox="0 0 16.1 16.1" fill="currentColor"><path d="M8 0a8 8 0 0 0-2.5 15.6c.4 0 .5-.2.5-.4v-1.5c-2 .4-2.5-.5-2.7-1 0-.1-.5-.9-.8-1-.3-.2-.7-.6 0-.6.6 0 1 .6 1.2.8.7 1.2 1.9 1 2.4.7 0-.5.2-.9.5-1-1.8-.3-3.7-1-3.7-4 0-.9.3-1.6.8-2.2 0-.2-.3-1 .1-2 0 0 .7-.3 2.2.7a7.4 7.4 0 0 1 4 0c1.5-1 2.2-.8 2.2-.8.5 1.1.2 2 .1 2.1.5.6.8 1.3.8 2.2 0 3-1.9 3.7-3.6 4 .3.2.5.7.5 1.4v2.2c0 .2.1.5.5.4A8 8 0 0 0 16 8a8 8 0 0 0-8-8z"></path></svg></span>Edit on GitHub</a></li>
          </ul>
        </div>
        <hr>
      </header>

      <div id="toc">
        <h2>Table of Contents</h2>
        <ul>
<li>
<p><span class="stability_2"><a href="#assert_assert">Assert</a></span></p>
<ul>
<li>
<p><a href="#assert_class_assert_assertionerror">Class: assert.AssertionError</a></p>
<ul>
<li><a href="#assert_new_assert_assertionerror_options">new assert.AssertionError(options)</a></li>
</ul>
</li>
<li><a href="#assert_strict_mode">Strict mode</a></li>
<li><a href="#assert_legacy_mode">Legacy mode</a></li>
<li><a href="#assert_assert_value_message">assert(value[, message])</a></li>
<li>
<p><a href="#assert_assert_deepequal_actual_expected_message">assert.deepEqual(actual, expected[, message])</a></p>
<ul>
<li><a href="#assert_comparison_details">Comparison details</a></li>
</ul>
</li>
<li>
<p><a href="#assert_assert_deepstrictequal_actual_expected_message">assert.deepStrictEqual(actual, expected[, message])</a></p>
<ul>
<li><a href="#assert_comparison_details_1">Comparison details</a></li>
</ul>
</li>
<li><a href="#assert_assert_doesnotreject_asyncfn_error_message">assert.doesNotReject(asyncFn[, error][, message])</a></li>
<li><a href="#assert_assert_doesnotthrow_fn_error_message">assert.doesNotThrow(fn[, error][, message])</a></li>
<li><a href="#assert_assert_equal_actual_expected_message">assert.equal(actual, expected[, message])</a></li>
<li><a href="#assert_assert_fail_message">assert.fail([message])</a></li>
<li><span class="stability_0"><a href="#assert_assert_fail_actual_expected_message_operator_stackstartfn">assert.fail(actual, expected[, message[, operator[, stackStartFn]]])</a></span></li>
<li><a href="#assert_assert_iferror_value">assert.ifError(value)</a></li>
<li><a href="#assert_assert_notdeepequal_actual_expected_message">assert.notDeepEqual(actual, expected[, message])</a></li>
<li><a href="#assert_assert_notdeepstrictequal_actual_expected_message">assert.notDeepStrictEqual(actual, expected[, message])</a></li>
<li><a href="#assert_assert_notequal_actual_expected_message">assert.notEqual(actual, expected[, message])</a></li>
<li><a href="#assert_assert_notstrictequal_actual_expected_message">assert.notStrictEqual(actual, expected[, message])</a></li>
<li><a href="#assert_assert_ok_value_message">assert.ok(value[, message])</a></li>
<li><a href="#assert_assert_rejects_asyncfn_error_message">assert.rejects(asyncFn[, error][, message])</a></li>
<li><a href="#assert_assert_strictequal_actual_expected_message">assert.strictEqual(actual, expected[, message])</a></li>
<li><a href="#assert_assert_throws_fn_error_message">assert.throws(fn[, error][, message])</a></li>
</ul>
</li>
</ul>
      </div>

      <div id="apicontent">
        <h1>Assert<span><a class="mark" href="#assert_assert" id="assert_assert">#</a></span></h1>

<p></p><div class="api_stability api_stability_2"><a href="https://nodejs.org/api/documentation.html#documentation_stability_index">Stability: 2</a> - Stable</div><p></p>
<p>The <code>assert</code> module provides a set of assertion functions for verifying
invariants. The module provides a recommended <a href="#assert_strict_mode"><code>strict</code> mode</a> and a more
lenient legacy mode.</p>
<h2>Class: assert.AssertionError<a class="srclink" href="https://github.com/nodejs/node/blob/3a2e75d9a5c31d20e429d505b82dd182e33f459a/lib/assert.js#L135">[src]</a><span><a class="mark" href="#assert_class_assert_assertionerror" id="assert_class_assert_assertionerror">#</a></span></h2>
<ul>
<li>Extends: <a href="https://nodejs.org/api/errors.html#errors_class_error" class="type">&lt;errors.Error&gt;</a></li>
</ul>
<p>Indicates the failure of an assertion. All errors thrown by the <code>assert</code> module
will be instances of the <code>AssertionError</code> class.</p>
<h3>new assert.AssertionError(options)<span><a class="mark" href="#assert_new_assert_assertionerror_options" id="assert_new_assert_assertionerror_options">#</a></span></h3>
<div class="api_metadata">
<span>Added in: v0.1.21</span>
</div>
<ul>
<li>
<p><code>options</code> <a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object" class="type">&lt;Object&gt;</a></p>
<ul>
<li><code>message</code> <a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Data_structures#String_type" class="type">&lt;string&gt;</a> If provided, the error message is set to this value.</li>
<li><code>actual</code> <a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Data_structures#Data_types" class="type">&lt;any&gt;</a> The <code>actual</code> property on the error instance.</li>
<li><code>expected</code> <a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Data_structures#Data_types" class="type">&lt;any&gt;</a> The <code>expected</code> property on the error instance.</li>
<li><code>operator</code> <a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Data_structures#String_type" class="type">&lt;string&gt;</a> The <code>operator</code> property on the error instance.</li>
<li><code>stackStartFn</code> <a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Function" class="type">&lt;Function&gt;</a> If provided, the generated stack trace omits
frames before this function.</li>
</ul>
</li>
</ul>
<p>A subclass of <code>Error</code> that indicates the failure of an assertion.</p>
<p>All instances contain the built-in <code>Error</code> properties (<code>message</code> and <code>name</code>)
and:</p>
<ul>
<li><code>actual</code> <a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Data_structures#Data_types" class="type">&lt;any&gt;</a> Set to the <code>actual</code> argument for methods such as
<a href="#assert_assert_strictequal_actual_expected_message"><code>assert.strictEqual()</code></a>.</li>
<li><code>expected</code> <a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Data_structures#Data_types" class="type">&lt;any&gt;</a> Set to the <code>expected</code> value for methods such as
<a href="#assert_assert_strictequal_actual_expected_message"><code>assert.strictEqual()</code></a>.</li>
<li><code>generatedMessage</code> <a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Data_structures#Boolean_type" class="type">&lt;boolean&gt;</a> Indicates if the message was auto-generated
(<code>true</code>) or not.</li>
<li><code>code</code> <a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Data_structures#String_type" class="type">&lt;string&gt;</a> Value is always <code>ERR_ASSERTION</code> to show that the error is an
assertion error.</li>
<li><code>operator</code> <a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Data_structures#String_type" class="type">&lt;string&gt;</a> Set to the passed in operator value.</li>
</ul>
<pre><code class="language-js">const assert = require('assert');

// Generate an AssertionError to compare the error message later:
const { message } = new assert.AssertionError({
  actual: 1,
  expected: 2,
  operator: 'strictEqual'
});

// Verify error output:
try {
  assert.strictEqual(1, 2);
} catch (err) {
  assert(err instanceof assert.AssertionError);
  assert.strictEqual(err.message, message);
  assert.strictEqual(err.name, 'AssertionError');
  assert.strictEqual(err.actual, 1);
  assert.strictEqual(err.expected, 2);
  assert.strictEqual(err.code, 'ERR_ASSERTION');
  assert.strictEqual(err.operator, 'strictEqual');
  assert.strictEqual(err.generatedMessage, true);
}
</code></pre>
<h2>Strict mode<span><a class="mark" href="#assert_strict_mode" id="assert_strict_mode">#</a></span></h2>
<div class="api_metadata">
<details class="changelog"><summary>History</summary>
<table>
<tbody><tr><th>Version</th><th>Changes</th></tr>
<tr><td>v9.9.0</td>
<td><p>Added error diffs to the strict mode</p></td></tr>
<tr><td>v9.9.0</td>
<td><p>Added strict mode to the assert module.</p></td></tr>
<tr><td>v9.9.0</td>
<td><p><span>Added in: v9.9.0</span></p></td></tr>
</tbody></table>
</details>
</div>
<p>In <code>strict</code> mode, <code>assert</code> functions use the comparison in the corresponding
strict functions. For example, <a href="#assert_assert_deepequal_actual_expected_message"><code>assert.deepEqual()</code></a> will behave like
<a href="#assert_assert_deepstrictequal_actual_expected_message"><code>assert.deepStrictEqual()</code></a>.</p>
<p>In <code>strict</code> mode, error messages for objects display a diff. In legacy mode,
error messages for objects display the objects, often truncated.</p>
<p>To use <code>strict</code> mode:</p>
<pre><code class="language-js">const assert = require('assert').strict;
</code></pre>
<p>Example error diff:</p>
<pre><code class="language-js">const assert = require('assert').strict;

assert.deepEqual([[[1, 2, 3]], 4, 5], [[[1, 2, '3']], 4, 5]);
// AssertionError: Expected inputs to be strictly deep-equal:
// + actual - expected ... Lines skipped
//
//   [
//     [
// ...
//       2,
// +     3
// -     '3'
//     ],
// ...
//     5
//   ]
</code></pre>
<p>To deactivate the colors, use the <code>NODE_DISABLE_COLORS</code> environment variable.
This will also deactivate the colors in the REPL.</p>
<h2>Legacy mode<span><a class="mark" href="#assert_legacy_mode" id="assert_legacy_mode">#</a></span></h2>
<p>Legacy mode uses the <a href="https://tc39.github.io/ecma262/#sec-abstract-equality-comparison">Abstract Equality Comparison</a> in:</p>
<ul>
<li><a href="#assert_assert_deepequal_actual_expected_message"><code>assert.deepEqual()</code></a></li>
<li>[<code>assert.equal()</code>][]</li>
<li>[<code>assert.notDeepEqual()</code>][]</li>
<li>[<code>assert.notEqual()</code>][]</li>
</ul>
<p>To use legacy mode:</p>
<pre><code class="language-js">const assert = require('assert');
</code></pre>
<p>Whenever possible, use the <a href="#assert_strict_mode"><code>strict</code> mode</a> instead. Otherwise, the
<a href="https://tc39.github.io/ecma262/#sec-abstract-equality-comparison">Abstract Equality Comparison</a> may cause surprising results. This is
especially true for <a href="#assert_assert_deepequal_actual_expected_message"><code>assert.deepEqual()</code></a>, where the comparison rules are
lax:</p>
<pre><code class="language-js">// WARNING: This does not throw an AssertionError!
assert.deepEqual(/a/gi, new Date());
</code></pre>
<h2>assert(value[, message])<a class="srclink" href="https://github.com/nodejs/node/blob/3a2e75d9a5c31d20e429d505b82dd182e33f459a/lib/assert.js#L76">[src]</a><span><a class="mark" href="#assert_assert_value_message" id="assert_assert_value_message">#</a></span></h2>
<div class="api_metadata">
<span>Added in: v0.5.9</span>
</div>
<ul>
<li><code>value</code> <a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Data_structures#Data_types" class="type">&lt;any&gt;</a> The input that is checked for being truthy.</li>
<li><code>message</code> <a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Data_structures#String_type" class="type">&lt;string&gt;</a> | <a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Error" class="type">&lt;Error&gt;</a></li>
</ul>
<p>An alias of <a href="#assert_assert_ok_value_message"><code>assert.ok()</code></a>.</p>
<h2>assert.deepEqual(actual, expected[, message])<a class="srclink" href="https://github.com/nodejs/node/blob/3a2e75d9a5c31d20e429d505b82dd182e33f459a/lib/assert.js#L421">[src]</a><span><a class="mark" href="#assert_assert_deepequal_actual_expected_message" id="assert_assert_deepequal_actual_expected_message">#</a></span></h2>
<div class="api_metadata">
<details class="changelog"><summary>History</summary>
<table>
<tbody><tr><th>Version</th><th>Changes</th></tr>
<tr><td>v12.0.0</td>
<td><p>The type tags are now properly compared and there are a couple minor comparison adjustments to make the check less surprising.</p></td></tr>
<tr><td>v9.0.0</td>
<td><p>The <code>Error</code> names and messages are now properly compared</p></td></tr>
<tr><td>v8.0.0</td>
<td><p>The <code>Set</code> and <code>Map</code> content is also compared</p></td></tr>
<tr><td>v6.4.0, v4.7.1</td>
<td><p>Typed array slices are handled correctly now.</p></td></tr>
<tr><td>v6.1.0, v4.5.0</td>
<td><p>Objects with circular references can be used as inputs now.</p></td></tr>
<tr><td>v5.10.1, v4.4.3</td>
<td><p>Handle non-<code>Uint8Array</code> typed arrays correctly.</p></td></tr>
<tr><td>v0.1.21</td>
<td><p><span>Added in: v0.1.21</span></p></td></tr>
</tbody></table>
</details>
</div>
<ul>
<li><code>actual</code> <a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Data_structures#Data_types" class="type">&lt;any&gt;</a></li>
<li><code>expected</code> <a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Data_structures#Data_types" class="type">&lt;any&gt;</a></li>
<li><code>message</code> <a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Data_structures#String_type" class="type">&lt;string&gt;</a> | <a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Error" class="type">&lt;Error&gt;</a></li>
</ul>
<p><strong>Strict mode</strong></p>
<p>An alias of <a href="#assert_assert_deepstrictequal_actual_expected_message"><code>assert.deepStrictEqual()</code></a>.</p>
<p><strong>Legacy mode</strong></p>
<p></p><div class="api_stability api_stability_0"><a href="https://nodejs.org/api/documentation.html#documentation_stability_index">Stability: 0</a> - Deprecated: Use <a href="#assert_assert_deepstrictequal_actual_expected_message"><code>assert.deepStrictEqual()</code></a> instead.</div><p></p>
<p>Tests for deep equality between the <code>actual</code> and <code>expected</code> parameters. Consider
using <a href="#assert_assert_deepstrictequal_actual_expected_message"><code>assert.deepStrictEqual()</code></a> instead. <a href="#assert_assert_deepequal_actual_expected_message"><code>assert.deepEqual()</code></a> can have
potentially surprising results.</p>
<p>"Deep" equality means that the enumerable "own" properties of child objects
are also recursively evaluated by the following rules.</p>
<h3>Comparison details<span><a class="mark" href="#assert_comparison_details" id="assert_comparison_details">#</a></span></h3>
<ul>
<li>Primitive values are compared with the <a href="https://tc39.github.io/ecma262/#sec-abstract-equality-comparison">Abstract Equality Comparison</a>
( <code>==</code> ).</li>
<li><a href="https://tc39.github.io/ecma262/#sec-object.prototype.tostring">Type tags</a> of objects should be the same.</li>
<li>Only <a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Enumerability_and_ownership_of_properties">enumerable "own" properties</a> are considered.</li>
<li><a href="https://nodejs.org/api/errors.html#errors_class_error"><code>Error</code></a> names and messages are always compared, even if these are not
enumerable properties.</li>
<li><a href="https://developer.mozilla.org/en-US/docs/Glossary/Primitive#Primitive_wrapper_objects_in_JavaScript">Object wrappers</a> are compared both as objects and unwrapped values.</li>
<li><code>Object</code> properties are compared unordered.</li>
<li><a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Map"><code>Map</code></a> keys and <a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Set"><code>Set</code></a> items are compared unordered.</li>
<li>Recursion stops when both sides differ or both sides encounter a circular
reference.</li>
<li>Implementation does not test the <a href="https://tc39.github.io/ecma262/#sec-ordinary-object-internal-methods-and-internal-slots"><code>[[Prototype]]</code></a> of
objects.</li>
<li><a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Symbol"><code>Symbol</code></a> properties are not compared.</li>
<li><a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/WeakMap"><code>WeakMap</code></a> and <a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/WeakSet"><code>WeakSet</code></a> comparison does not rely on their values.</li>
</ul>
<p>The following example does not throw an <code>AssertionError</code> because the primitives
are considered equal by the <a href="https://tc39.github.io/ecma262/#sec-abstract-equality-comparison">Abstract Equality Comparison</a> ( <code>==</code> ).</p>
<pre><code class="language-js">// WARNING: This does not throw an AssertionError!
assert.deepEqual('+00000000', false);
</code></pre>
<p>"Deep" equality means that the enumerable "own" properties of child objects
are evaluated also:</p>
<pre><code class="language-js">const assert = require('assert');

const obj1 = {
  a: {
    b: 1
  }
};
const obj2 = {
  a: {
    b: 2
  }
};
const obj3 = {
  a: {
    b: 1
  }
};
const obj4 = Object.create(obj1);

assert.deepEqual(obj1, obj1);
// OK

// Values of b are different:
assert.deepEqual(obj1, obj2);
// AssertionError: { a: { b: 1 } } deepEqual { a: { b: 2 } }

assert.deepEqual(obj1, obj3);
// OK

// Prototypes are ignored:
assert.deepEqual(obj1, obj4);
// AssertionError: { a: { b: 1 } } deepEqual {}
</code></pre>
<p>If the values are not equal, an <code>AssertionError</code> is thrown with a <code>message</code>
property set equal to the value of the <code>message</code> parameter. If the <code>message</code>
parameter is undefined, a default error message is assigned. If the <code>message</code>
parameter is an instance of an <a href="https://nodejs.org/api/errors.html#errors_class_error"><code>Error</code></a> then it will be thrown instead of the
<code>AssertionError</code>.</p>
<h2>assert.deepStrictEqual(actual, expected[, message])<a class="srclink" href="https://github.com/nodejs/node/blob/3a2e75d9a5c31d20e429d505b82dd182e33f459a/lib/assert.js#L455">[src]</a><span><a class="mark" href="#assert_assert_deepstrictequal_actual_expected_message" id="assert_assert_deepstrictequal_actual_expected_message">#</a></span></h2>
<div class="api_metadata">
<details class="changelog"><summary>History</summary>
<table>
<tbody><tr><th>Version</th><th>Changes</th></tr>
<tr><td>v9.0.0</td>
<td><p>Enumerable symbol properties are now compared.</p></td></tr>
<tr><td>v9.0.0</td>
<td><p>The <code>NaN</code> is now compared using the <a href="https://tc39.github.io/ecma262/#sec-samevaluezero">SameValueZero</a> comparison.</p></td></tr>
<tr><td>v8.5.0</td>
<td><p>The <code>Error</code> names and messages are now properly compared</p></td></tr>
<tr><td>v8.0.0</td>
<td><p>The <code>Set</code> and <code>Map</code> content is also compared</p></td></tr>
<tr><td>v6.4.0, v4.7.1</td>
<td><p>Typed array slices are handled correctly now.</p></td></tr>
<tr><td>v6.1.0</td>
<td><p>Objects with circular references can be used as inputs now.</p></td></tr>
<tr><td>v5.10.1, v4.4.3</td>
<td><p>Handle non-<code>Uint8Array</code> typed arrays correctly.</p></td></tr>
<tr><td>v1.2.0</td>
<td><p><span>Added in: v1.2.0</span></p></td></tr>
</tbody></table>
</details>
</div>
<ul>
<li><code>actual</code> <a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Data_structures#Data_types" class="type">&lt;any&gt;</a></li>
<li><code>expected</code> <a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Data_structures#Data_types" class="type">&lt;any&gt;</a></li>
<li><code>message</code> <a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Data_structures#String_type" class="type">&lt;string&gt;</a> | <a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Error" class="type">&lt;Error&gt;</a></li>
</ul>
<p>Tests for deep equality between the <code>actual</code> and <code>expected</code> parameters.
"Deep" equality means that the enumerable "own" properties of child objects
are recursively evaluated also by the following rules.</p>
<h3>Comparison details<span><a class="mark" href="#assert_comparison_details_1" id="assert_comparison_details_1">#</a></span></h3>
<ul>
<li>Primitive values are compared using the <a href="https://tc39.github.io/ecma262/#sec-samevalue">SameValue Comparison</a>, used by
<a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object/is"><code>Object.is()</code></a>.</li>
<li><a href="https://tc39.github.io/ecma262/#sec-object.prototype.tostring">Type tags</a> of objects should be the same.</li>
<li><a href="https://tc39.github.io/ecma262/#sec-ordinary-object-internal-methods-and-internal-slots"><code>[[Prototype]]</code></a> of objects are compared using
the <a href="https://tc39.github.io/ecma262/#sec-strict-equality-comparison">Strict Equality Comparison</a>.</li>
<li>Only <a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Enumerability_and_ownership_of_properties">enumerable "own" properties</a> are considered.</li>
<li><a href="https://nodejs.org/api/errors.html#errors_class_error"><code>Error</code></a> names and messages are always compared, even if these are not
enumerable properties.</li>
<li>Enumerable own <a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Symbol"><code>Symbol</code></a> properties are compared as well.</li>
<li><a href="https://developer.mozilla.org/en-US/docs/Glossary/Primitive#Primitive_wrapper_objects_in_JavaScript">Object wrappers</a> are compared both as objects and unwrapped values.</li>
<li><code>Object</code> properties are compared unordered.</li>
<li><a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Map"><code>Map</code></a> keys and <a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Set"><code>Set</code></a> items are compared unordered.</li>
<li>Recursion stops when both sides differ or both sides encounter a circular
reference.</li>
<li><a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/WeakMap"><code>WeakMap</code></a> and <a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/WeakSet"><code>WeakSet</code></a> comparison does not rely on their values. See
below for further details.</li>
</ul>
<pre><code class="language-js">const assert = require('assert').strict;

// This fails because 1 !== '1'.
assert.deepStrictEqual({ a: 1 }, { a: '1' });
// AssertionError: Expected inputs to be strictly deep-equal:
// + actual - expected
//
//   {
// +   a: 1
// -   a: '1'
//   }

// The following objects don't have own properties
const date = new Date();
const object = {};
const fakeDate = {};
Object.setPrototypeOf(fakeDate, Date.prototype);

// Different [[Prototype]]:
assert.deepStrictEqual(object, fakeDate);
// AssertionError: Expected inputs to be strictly deep-equal:
// + actual - expected
//
// + {}
// - Date {}

// Different type tags:
assert.deepStrictEqual(date, fakeDate);
// AssertionError: Expected inputs to be strictly deep-equal:
// + actual - expected
//
// + 2018-04-26T00:49:08.604Z
// - Date {}

assert.deepStrictEqual(NaN, NaN);
// OK, because of the SameValue comparison

// Different unwrapped numbers:
assert.deepStrictEqual(new Number(1), new Number(2));
// AssertionError: Expected inputs to be strictly deep-equal:
// + actual - expected
//
// + [Number: 1]
// - [Number: 2]

assert.deepStrictEqual(new String('foo'), Object('foo'));
// OK because the object and the string are identical when unwrapped.

assert.deepStrictEqual(-0, -0);
// OK

// Different zeros using the SameValue Comparison:
assert.deepStrictEqual(0, -0);
// AssertionError: Expected inputs to be strictly deep-equal:
// + actual - expected
//
// + 0
// - -0

const symbol1 = Symbol();
const symbol2 = Symbol();
assert.deepStrictEqual({ [symbol1]: 1 }, { [symbol1]: 1 });
// OK, because it is the same symbol on both objects.

assert.deepStrictEqual({ [symbol1]: 1 }, { [symbol2]: 1 });
// AssertionError [ERR_ASSERTION]: Inputs identical but not reference equal:
//
// {
//   [Symbol()]: 1
// }

const weakMap1 = new WeakMap();
const weakMap2 = new WeakMap([[{}, {}]]);
const weakMap3 = new WeakMap();
weakMap3.unequal = true;

assert.deepStrictEqual(weakMap1, weakMap2);
// OK, because it is impossible to compare the entries

// Fails because weakMap3 has a property that weakMap1 does not contain:
assert.deepStrictEqual(weakMap1, weakMap3);
// AssertionError: Expected inputs to be strictly deep-equal:
// + actual - expected
//
//   WeakMap {
// +   [items unknown]
// -   [items unknown],
// -   unequal: true
//   }
</code></pre>
<p>If the values are not equal, an <code>AssertionError</code> is thrown with a <code>message</code>
property set equal to the value of the <code>message</code> parameter. If the <code>message</code>
parameter is undefined, a default error message is assigned. If the <code>message</code>
parameter is an instance of an <a href="https://nodejs.org/api/errors.html#errors_class_error"><code>Error</code></a> then it will be thrown instead of the
<code>AssertionError</code>.</p>
<h2>assert.doesNotReject(asyncFn[, error][, message])<a class="srclink" href="https://github.com/nodejs/node/blob/3a2e75d9a5c31d20e429d505b82dd182e33f459a/lib/assert.js#L788">[src]</a><span><a class="mark" href="#assert_assert_doesnotreject_asyncfn_error_message" id="assert_assert_doesnotreject_asyncfn_error_message">#</a></span></h2>
<div class="api_metadata">
<span>Added in: v10.0.0</span>
</div>
<ul>
<li><code>asyncFn</code> <a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Function" class="type">&lt;Function&gt;</a> | <a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Promise" class="type">&lt;Promise&gt;</a></li>
<li><code>error</code> <a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/RegExp" class="type">&lt;RegExp&gt;</a> | <a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Function" class="type">&lt;Function&gt;</a></li>
<li><code>message</code> <a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Data_structures#String_type" class="type">&lt;string&gt;</a></li>
</ul>
<p>Awaits the <code>asyncFn</code> promise or, if <code>asyncFn</code> is a function, immediately
calls the function and awaits the returned promise to complete. It will then
check that the promise is not rejected.</p>
<p>If <code>asyncFn</code> is a function and it throws an error synchronously,
<code>assert.doesNotReject()</code> will return a rejected <code>Promise</code> with that error. If
the function does not return a promise, <code>assert.doesNotReject()</code> will return a
rejected <code>Promise</code> with an <a href="https://nodejs.org/api/errors.html#errors_err_invalid_return_value"><code>ERR_INVALID_RETURN_VALUE</code></a> error. In both cases
the error handler is skipped.</p>
<p>Using <code>assert.doesNotReject()</code> is actually not useful because there is little
benefit in catching a rejection and then rejecting it again. Instead, consider
adding a comment next to the specific code path that should not reject and keep
error messages as expressive as possible.</p>
<p>If specified, <code>error</code> can be a <a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Classes"><code>Class</code></a>, <a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Regular_Expressions"><code>RegExp</code></a> or a validation
function. See <a href="#assert_assert_throws_fn_error_message"><code>assert.throws()</code></a> for more details.</p>
<p>Besides the async nature to await the completion behaves identically to
<a href="#assert_assert_doesnotthrow_fn_error_message"><code>assert.doesNotThrow()</code></a>.</p>
<!-- eslint-disable no-restricted-syntax -->
<pre><code class="language-js">(async () =&gt; {
  await assert.doesNotReject(
    async () =&gt; {
      throw new TypeError('Wrong value');
    },
    SyntaxError
  );
})();
</code></pre>
<!-- eslint-disable no-restricted-syntax -->
<pre><code class="language-js">assert.doesNotReject(Promise.reject(new TypeError('Wrong value')))
  .then(() =&gt; {
    // ...
  });
</code></pre>
<h2>assert.doesNotThrow(fn[, error][, message])<a class="srclink" href="https://github.com/nodejs/node/blob/3a2e75d9a5c31d20e429d505b82dd182e33f459a/lib/assert.js#L784">[src]</a><span><a class="mark" href="#assert_assert_doesnotthrow_fn_error_message" id="assert_assert_doesnotthrow_fn_error_message">#</a></span></h2>
<div class="api_metadata">
<details class="changelog"><summary>History</summary>
<table>
<tbody><tr><th>Version</th><th>Changes</th></tr>
<tr><td>v5.11.0, v4.4.5</td>
<td><p>The <code>message</code> parameter is respected now.</p></td></tr>
<tr><td>v4.2.0</td>
<td><p>The <code>error</code> parameter can now be an arrow function.</p></td></tr>
<tr><td>v0.1.21</td>
<td><p><span>Added in: v0.1.21</span></p></td></tr>
</tbody></table>
</details>
</div>
<ul>
<li><code>fn</code> <a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Function" class="type">&lt;Function&gt;</a></li>
<li><code>error</code> <a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/RegExp" class="type">&lt;RegExp&gt;</a> | <a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Function" class="type">&lt;Function&gt;</a></li>
<li><code>message</code> <a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Data_structures#String_type" class="type">&lt;string&gt;</a></li>
</ul>
<p>Asserts that the function <code>fn</code> does not throw an error.</p>
<p>Using <code>assert.doesNotThrow()</code> is actually not useful because there
is no benefit in catching an error and then rethrowing it. Instead, consider
adding a comment next to the specific code path that should not throw and keep
error messages as expressive as possible.</p>
<p>When <code>assert.doesNotThrow()</code> is called, it will immediately call the <code>fn</code>
function.</p>
<p>If an error is thrown and it is the same type as that specified by the <code>error</code>
parameter, then an <code>AssertionError</code> is thrown. If the error is of a different
type, or if the <code>error</code> parameter is undefined, the error is propagated back
to the caller.</p>
<p>If specified, <code>error</code> can be a <a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Classes"><code>Class</code></a>, <a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Regular_Expressions"><code>RegExp</code></a> or a validation
function. See <a href="#assert_assert_throws_fn_error_message"><code>assert.throws()</code></a> for more details.</p>
<p>The following, for instance, will throw the <a href="https://nodejs.org/api/errors.html#errors_class_typeerror"><code>TypeError</code></a> because there is no
matching error type in the assertion:</p>
<!-- eslint-disable no-restricted-syntax -->
<pre><code class="language-js">assert.doesNotThrow(
  () =&gt; {
    throw new TypeError('Wrong value');
  },
  SyntaxError
);
</code></pre>
<p>However, the following will result in an <code>AssertionError</code> with the message
'Got unwanted exception...':</p>
<!-- eslint-disable no-restricted-syntax -->
<pre><code class="language-js">assert.doesNotThrow(
  () =&gt; {
    throw new TypeError('Wrong value');
  },
  TypeError
);
</code></pre>
<p>If an <code>AssertionError</code> is thrown and a value is provided for the <code>message</code>
parameter, the value of <code>message</code> will be appended to the <code>AssertionError</code>
message:</p>
<!-- eslint-disable no-restricted-syntax -->
<pre><code class="language-js">assert.doesNotThrow(
  () =&gt; {
    throw new TypeError('Wrong value');
  },
  /Wrong value/,
  'Whoops'
);
// Throws: AssertionError: Got unwanted exception: Whoops
</code></pre>
<h2>assert.equal(actual, expected[, message])<a class="srclink" href="https://github.com/nodejs/node/blob/3a2e75d9a5c31d20e429d505b82dd182e33f459a/lib/assert.js#L386">[src]</a><span><a class="mark" href="#assert_assert_equal_actual_expected_message" id="assert_assert_equal_actual_expected_message">#</a></span></h2>
<div class="api_metadata">
<span>Added in: v0.1.21</span>
</div>
<ul>
<li><code>actual</code> <a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Data_structures#Data_types" class="type">&lt;any&gt;</a></li>
<li><code>expected</code> <a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Data_structures#Data_types" class="type">&lt;any&gt;</a></li>
<li><code>message</code> <a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Data_structures#String_type" class="type">&lt;string&gt;</a> | <a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Error" class="type">&lt;Error&gt;</a></li>
</ul>
<p><strong>Strict mode</strong></p>
<p>An alias of <a href="#assert_assert_strictequal_actual_expected_message"><code>assert.strictEqual()</code></a>.</p>
<p><strong>Legacy mode</strong></p>
<p></p><div class="api_stability api_stability_0"><a href="https://nodejs.org/api/documentation.html#documentation_stability_index">Stability: 0</a> - Deprecated: Use <a href="#assert_assert_strictequal_actual_expected_message"><code>assert.strictEqual()</code></a> instead.</div><p></p>
<p>Tests shallow, coercive equality between the <code>actual</code> and <code>expected</code> parameters
using the <a href="https://tc39.github.io/ecma262/#sec-abstract-equality-comparison">Abstract Equality Comparison</a> ( <code>==</code> ).</p>
<pre><code class="language-js">const assert = require('assert');

assert.equal(1, 1);
// OK, 1 == 1
assert.equal(1, '1');
// OK, 1 == '1'

assert.equal(1, 2);
// AssertionError: 1 == 2
assert.equal({ a: { b: 1 } }, { a: { b: 1 } });
// AssertionError: { a: { b: 1 } } == { a: { b: 1 } }
</code></pre>
<p>If the values are not equal, an <code>AssertionError</code> is thrown with a <code>message</code>
property set equal to the value of the <code>message</code> parameter. If the <code>message</code>
parameter is undefined, a default error message is assigned. If the <code>message</code>
parameter is an instance of an <a href="https://nodejs.org/api/errors.html#errors_class_error"><code>Error</code></a> then it will be thrown instead of the
<code>AssertionError</code>.</p>
<h2>assert.fail([message])<a class="srclink" href="https://github.com/nodejs/node/blob/3a2e75d9a5c31d20e429d505b82dd182e33f459a/lib/assert.js#L92">[src]</a><span><a class="mark" href="#assert_assert_fail_message" id="assert_assert_fail_message">#</a></span></h2>
<div class="api_metadata">
<span>Added in: v0.1.21</span>
</div>
<ul>
<li><code>message</code> <a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Data_structures#String_type" class="type">&lt;string&gt;</a> | <a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Error" class="type">&lt;Error&gt;</a> <strong>Default:</strong> <code>'Failed'</code></li>
</ul>
<p>Throws an <code>AssertionError</code> with the provided error message or a default error
message. If the <code>message</code> parameter is an instance of an <a href="https://nodejs.org/api/errors.html#errors_class_error"><code>Error</code></a> then it
will be thrown instead of the <code>AssertionError</code>.</p>
<pre><code class="language-js">const assert = require('assert').strict;

assert.fail();
// AssertionError [ERR_ASSERTION]: Failed

assert.fail('boom');
// AssertionError [ERR_ASSERTION]: boom

assert.fail(new TypeError('need array'));
// TypeError: need array
</code></pre>
<p>Using <code>assert.fail()</code> with more than two arguments is possible but deprecated.
See below for further details.</p>
<h2>assert.fail(actual, expected[, message[, operator[, stackStartFn]]])<a class="srclink" href="https://github.com/nodejs/node/blob/3a2e75d9a5c31d20e429d505b82dd182e33f459a/lib/assert.js#L92">[src]</a><span><a class="mark" href="#assert_assert_fail_actual_expected_message_operator_stackstartfn" id="assert_assert_fail_actual_expected_message_operator_stackstartfn">#</a></span></h2>
<div class="api_metadata">
<details class="changelog"><summary>History</summary>
<table>
<tbody><tr><th>Version</th><th>Changes</th></tr>
<tr><td>v10.0.0</td>
<td><p>Calling <code>assert.fail()</code> with more than one argument is deprecated and emits a warning.</p></td></tr>
<tr><td>v0.1.21</td>
<td><p><span>Added in: v0.1.21</span></p></td></tr>
</tbody></table>
</details>
</div>
<ul>
<li><code>actual</code> <a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Data_structures#Data_types" class="type">&lt;any&gt;</a></li>
<li><code>expected</code> <a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Data_structures#Data_types" class="type">&lt;any&gt;</a></li>
<li><code>message</code> <a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Data_structures#String_type" class="type">&lt;string&gt;</a> | <a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Error" class="type">&lt;Error&gt;</a></li>
<li><code>operator</code> <a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Data_structures#String_type" class="type">&lt;string&gt;</a> <strong>Default:</strong> <code>'!='</code></li>
<li><code>stackStartFn</code> <a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Function" class="type">&lt;Function&gt;</a> <strong>Default:</strong> <code>assert.fail</code></li>
</ul>
<p></p><div class="api_stability api_stability_0"><a href="https://nodejs.org/api/documentation.html#documentation_stability_index">Stability: 0</a> - Deprecated: Use <code>assert.fail([message])</code> or other assert
functions instead.</div><p></p>
<p>If <code>message</code> is falsy, the error message is set as the values of <code>actual</code> and
<code>expected</code> separated by the provided <code>operator</code>. If just the two <code>actual</code> and
<code>expected</code> arguments are provided, <code>operator</code> will default to <code>'!='</code>. If
<code>message</code> is provided as third argument it will be used as the error message and
the other arguments will be stored as properties on the thrown object. If
<code>stackStartFn</code> is provided, all stack frames above that function will be
removed from stacktrace (see <a href="https://nodejs.org/api/errors.html#errors_error_capturestacktrace_targetobject_constructoropt"><code>Error.captureStackTrace</code></a>). If no arguments are
given, the default message <code>Failed</code> will be used.</p>
<pre><code class="language-js">const assert = require('assert').strict;

assert.fail('a', 'b');
// AssertionError [ERR_ASSERTION]: 'a' != 'b'

assert.fail(1, 2, undefined, '&gt;');
// AssertionError [ERR_ASSERTION]: 1 &gt; 2

assert.fail(1, 2, 'fail');
// AssertionError [ERR_ASSERTION]: fail

assert.fail(1, 2, 'whoops', '&gt;');
// AssertionError [ERR_ASSERTION]: whoops

assert.fail(1, 2, new TypeError('need array'));
// TypeError: need array
</code></pre>
<p>In the last three cases <code>actual</code>, <code>expected</code>, and <code>operator</code> have no
influence on the error message.</p>
<p>Example use of <code>stackStartFn</code> for truncating the exception's stacktrace:</p>
<pre><code class="language-js">function suppressFrame() {
  assert.fail('a', 'b', undefined, '!==', suppressFrame);
}
suppressFrame();
// AssertionError [ERR_ASSERTION]: 'a' !== 'b'
//     at repl:1:1
//     at ContextifyScript.Script.runInThisContext (vm.js:44:33)
//     ...
</code></pre>
<h2>assert.ifError(value)<a class="srclink" href="https://github.com/nodejs/node/blob/3a2e75d9a5c31d20e429d505b82dd182e33f459a/lib/assert.js#L792">[src]</a><span><a class="mark" href="#assert_assert_iferror_value" id="assert_assert_iferror_value">#</a></span></h2>
<div class="api_metadata">
<details class="changelog"><summary>History</summary>
<table>
<tbody><tr><th>Version</th><th>Changes</th></tr>
<tr><td>v10.0.0</td>
<td><p>Instead of throwing the original error it is now wrapped into an <code>AssertionError</code> that contains the full stack trace.</p></td></tr>
<tr><td>v10.0.0</td>
<td><p>Value may now only be <code>undefined</code> or <code>null</code>. Before all falsy values were handled the same as <code>null</code> and did not throw.</p></td></tr>
<tr><td>v0.1.97</td>
<td><p><span>Added in: v0.1.97</span></p></td></tr>
</tbody></table>
</details>
</div>
<ul>
<li><code>value</code> <a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Data_structures#Data_types" class="type">&lt;any&gt;</a></li>
</ul>
<p>Throws <code>value</code> if <code>value</code> is not <code>undefined</code> or <code>null</code>. This is useful when
testing the <code>error</code> argument in callbacks. The stack trace contains all frames
from the error passed to <code>ifError()</code> including the potential new frames for
<code>ifError()</code> itself.</p>
<pre><code class="language-js">const assert = require('assert').strict;

assert.ifError(null);
// OK
assert.ifError(0);
// AssertionError [ERR_ASSERTION]: ifError got unwanted exception: 0
assert.ifError('error');
// AssertionError [ERR_ASSERTION]: ifError got unwanted exception: 'error'
assert.ifError(new Error());
// AssertionError [ERR_ASSERTION]: ifError got unwanted exception: Error

// Create some random error frames.
let err;
(function errorFrame() {
  err = new Error('test error');
})();

(function ifErrorFrame() {
  assert.ifError(err);
})();
// AssertionError [ERR_ASSERTION]: ifError got unwanted exception: test error
//     at ifErrorFrame
//     at errorFrame
</code></pre>
<h2>assert.notDeepEqual(actual, expected[, message])<a class="srclink" href="https://github.com/nodejs/node/blob/3a2e75d9a5c31d20e429d505b82dd182e33f459a/lib/assert.js#L438">[src]</a><span><a class="mark" href="#assert_assert_notdeepequal_actual_expected_message" id="assert_assert_notdeepequal_actual_expected_message">#</a></span></h2>
<div class="api_metadata">
<details class="changelog"><summary>History</summary>
<table>
<tbody><tr><th>Version</th><th>Changes</th></tr>
<tr><td>v9.0.0</td>
<td><p>The <code>Error</code> names and messages are now properly compared</p></td></tr>
<tr><td>v8.0.0</td>
<td><p>The <code>Set</code> and <code>Map</code> content is also compared</p></td></tr>
<tr><td>v6.4.0, v4.7.1</td>
<td><p>Typed array slices are handled correctly now.</p></td></tr>
<tr><td>v6.1.0, v4.5.0</td>
<td><p>Objects with circular references can be used as inputs now.</p></td></tr>
<tr><td>v5.10.1, v4.4.3</td>
<td><p>Handle non-<code>Uint8Array</code> typed arrays correctly.</p></td></tr>
<tr><td>v0.1.21</td>
<td><p><span>Added in: v0.1.21</span></p></td></tr>
</tbody></table>
</details>
</div>
<ul>
<li><code>actual</code> <a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Data_structures#Data_types" class="type">&lt;any&gt;</a></li>
<li><code>expected</code> <a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Data_structures#Data_types" class="type">&lt;any&gt;</a></li>
<li><code>message</code> <a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Data_structures#String_type" class="type">&lt;string&gt;</a> | <a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Error" class="type">&lt;Error&gt;</a></li>
</ul>
<p><strong>Strict mode</strong></p>
<p>An alias of <a href="#assert_assert_notdeepstrictequal_actual_expected_message"><code>assert.notDeepStrictEqual()</code></a>.</p>
<p><strong>Legacy mode</strong></p>
<p></p><div class="api_stability api_stability_0"><a href="https://nodejs.org/api/documentation.html#documentation_stability_index">Stability: 0</a> - Deprecated: Use <a href="#assert_assert_notdeepstrictequal_actual_expected_message"><code>assert.notDeepStrictEqual()</code></a> instead.</div><p></p>
<p>Tests for any deep inequality. Opposite of <a href="#assert_assert_deepequal_actual_expected_message"><code>assert.deepEqual()</code></a>.</p>
<pre><code class="language-js">const assert = require('assert');

const obj1 = {
  a: {
    b: 1
  }
};
const obj2 = {
  a: {
    b: 2
  }
};
const obj3 = {
  a: {
    b: 1
  }
};
const obj4 = Object.create(obj1);

assert.notDeepEqual(obj1, obj1);
// AssertionError: { a: { b: 1 } } notDeepEqual { a: { b: 1 } }

assert.notDeepEqual(obj1, obj2);
// OK

assert.notDeepEqual(obj1, obj3);
// AssertionError: { a: { b: 1 } } notDeepEqual { a: { b: 1 } }

assert.notDeepEqual(obj1, obj4);
// OK
</code></pre>
<p>If the values are deeply equal, an <code>AssertionError</code> is thrown with a <code>message</code>
property set equal to the value of the <code>message</code> parameter. If the <code>message</code>
parameter is undefined, a default error message is assigned. If the <code>message</code>
parameter is an instance of an <a href="https://nodejs.org/api/errors.html#errors_class_error"><code>Error</code></a> then it will be thrown instead of the
<code>AssertionError</code>.</p>
<h2>assert.notDeepStrictEqual(actual, expected[, message])<a class="srclink" href="https://github.com/nodejs/node/blob/3a2e75d9a5c31d20e429d505b82dd182e33f459a/lib/assert.js#L472">[src]</a><span><a class="mark" href="#assert_assert_notdeepstrictequal_actual_expected_message" id="assert_assert_notdeepstrictequal_actual_expected_message">#</a></span></h2>
<div class="api_metadata">
<details class="changelog"><summary>History</summary>
<table>
<tbody><tr><th>Version</th><th>Changes</th></tr>
<tr><td>v9.0.0</td>
<td><p>The <code>-0</code> and <code>+0</code> are not considered equal anymore.</p></td></tr>
<tr><td>v9.0.0</td>
<td><p>The <code>NaN</code> is now compared using the <a href="https://tc39.github.io/ecma262/#sec-samevaluezero">SameValueZero</a> comparison.</p></td></tr>
<tr><td>v9.0.0</td>
<td><p>The <code>Error</code> names and messages are now properly compared</p></td></tr>
<tr><td>v8.0.0</td>
<td><p>The <code>Set</code> and <code>Map</code> content is also compared</p></td></tr>
<tr><td>v6.4.0, v4.7.1</td>
<td><p>Typed array slices are handled correctly now.</p></td></tr>
<tr><td>v6.1.0</td>
<td><p>Objects with circular references can be used as inputs now.</p></td></tr>
<tr><td>v5.10.1, v4.4.3</td>
<td><p>Handle non-<code>Uint8Array</code> typed arrays correctly.</p></td></tr>
<tr><td>v1.2.0</td>
<td><p><span>Added in: v1.2.0</span></p></td></tr>
</tbody></table>
</details>
</div>
<ul>
<li><code>actual</code> <a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Data_structures#Data_types" class="type">&lt;any&gt;</a></li>
<li><code>expected</code> <a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Data_structures#Data_types" class="type">&lt;any&gt;</a></li>
<li><code>message</code> <a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Data_structures#String_type" class="type">&lt;string&gt;</a> | <a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Error" class="type">&lt;Error&gt;</a></li>
</ul>
<p>Tests for deep strict inequality. Opposite of <a href="#assert_assert_deepstrictequal_actual_expected_message"><code>assert.deepStrictEqual()</code></a>.</p>
<pre><code class="language-js">const assert = require('assert').strict;

assert.notDeepStrictEqual({ a: 1 }, { a: '1' });
// OK
</code></pre>
<p>If the values are deeply and strictly equal, an <code>AssertionError</code> is thrown with
a <code>message</code> property set equal to the value of the <code>message</code> parameter. If the
<code>message</code> parameter is undefined, a default error message is assigned. If the
<code>message</code> parameter is an instance of an <a href="https://nodejs.org/api/errors.html#errors_class_error"><code>Error</code></a> then it will be thrown
instead of the <code>AssertionError</code>.</p>
<h2>assert.notEqual(actual, expected[, message])<a class="srclink" href="https://github.com/nodejs/node/blob/3a2e75d9a5c31d20e429d505b82dd182e33f459a/lib/assert.js#L404">[src]</a><span><a class="mark" href="#assert_assert_notequal_actual_expected_message" id="assert_assert_notequal_actual_expected_message">#</a></span></h2>
<div class="api_metadata">
<span>Added in: v0.1.21</span>
</div>
<ul>
<li><code>actual</code> <a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Data_structures#Data_types" class="type">&lt;any&gt;</a></li>
<li><code>expected</code> <a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Data_structures#Data_types" class="type">&lt;any&gt;</a></li>
<li><code>message</code> <a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Data_structures#String_type" class="type">&lt;string&gt;</a> | <a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Error" class="type">&lt;Error&gt;</a></li>
</ul>
<p><strong>Strict mode</strong></p>
<p>An alias of <a href="#assert_assert_notstrictequal_actual_expected_message"><code>assert.notStrictEqual()</code></a>.</p>
<p><strong>Legacy mode</strong></p>
<p></p><div class="api_stability api_stability_0"><a href="https://nodejs.org/api/documentation.html#documentation_stability_index">Stability: 0</a> - Deprecated: Use <a href="#assert_assert_notstrictequal_actual_expected_message"><code>assert.notStrictEqual()</code></a> instead.</div><p></p>
<p>Tests shallow, coercive inequality with the <a href="https://tc39.github.io/ecma262/#sec-abstract-equality-comparison">Abstract Equality Comparison</a>
( <code>!=</code> ).</p>
<pre><code class="language-js">const assert = require('assert');

assert.notEqual(1, 2);
// OK

assert.notEqual(1, 1);
// AssertionError: 1 != 1

assert.notEqual(1, '1');
// AssertionError: 1 != '1'
</code></pre>
<p>If the values are equal, an <code>AssertionError</code> is thrown with a <code>message</code> property
set equal to the value of the <code>message</code> parameter. If the <code>message</code> parameter is
undefined, a default error message is assigned. If the <code>message</code> parameter is an
instance of an <a href="https://nodejs.org/api/errors.html#errors_class_error"><code>Error</code></a> then it will be thrown instead of the
<code>AssertionError</code>.</p>
<h2>assert.notStrictEqual(actual, expected[, message])<a class="srclink" href="https://github.com/nodejs/node/blob/3a2e75d9a5c31d20e429d505b82dd182e33f459a/lib/assert.js#L503">[src]</a><span><a class="mark" href="#assert_assert_notstrictequal_actual_expected_message" id="assert_assert_notstrictequal_actual_expected_message">#</a></span></h2>
<div class="api_metadata">
<details class="changelog"><summary>History</summary>
<table>
<tbody><tr><th>Version</th><th>Changes</th></tr>
<tr><td>v10.0.0</td>
<td><p>Used comparison changed from Strict Equality to <code>Object.is()</code></p></td></tr>
<tr><td>v0.1.21</td>
<td><p><span>Added in: v0.1.21</span></p></td></tr>
</tbody></table>
</details>
</div>
<ul>
<li><code>actual</code> <a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Data_structures#Data_types" class="type">&lt;any&gt;</a></li>
<li><code>expected</code> <a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Data_structures#Data_types" class="type">&lt;any&gt;</a></li>
<li><code>message</code> <a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Data_structures#String_type" class="type">&lt;string&gt;</a> | <a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Error" class="type">&lt;Error&gt;</a></li>
</ul>
<p>Tests strict inequality between the <code>actual</code> and <code>expected</code> parameters as
determined by the <a href="https://tc39.github.io/ecma262/#sec-samevalue">SameValue Comparison</a>.</p>
<pre><code class="language-js">const assert = require('assert').strict;

assert.notStrictEqual(1, 2);
// OK

assert.notStrictEqual(1, 1);
// AssertionError [ERR_ASSERTION]: Expected "actual" to be strictly unequal to:
//
// 1

assert.notStrictEqual(1, '1');
// OK
</code></pre>
<p>If the values are strictly equal, an <code>AssertionError</code> is thrown with a <code>message</code>
property set equal to the value of the <code>message</code> parameter. If the <code>message</code>
parameter is undefined, a default error message is assigned. If the <code>message</code>
parameter is an instance of an <a href="https://nodejs.org/api/errors.html#errors_class_error"><code>Error</code></a> then it will be thrown instead of the
<code>AssertionError</code>.</p>
<h2>assert.ok(value[, message])<a class="srclink" href="https://github.com/nodejs/node/blob/3a2e75d9a5c31d20e429d505b82dd182e33f459a/lib/assert.js#L379">[src]</a><span><a class="mark" href="#assert_assert_ok_value_message" id="assert_assert_ok_value_message">#</a></span></h2>
<div class="api_metadata">
<details class="changelog"><summary>History</summary>
<table>
<tbody><tr><th>Version</th><th>Changes</th></tr>
<tr><td>v10.0.0</td>
<td><p>The <code>assert.ok()</code> (no arguments) will now use a predefined error message.</p></td></tr>
<tr><td>v0.1.21</td>
<td><p><span>Added in: v0.1.21</span></p></td></tr>
</tbody></table>
</details>
</div>
<ul>
<li><code>value</code> <a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Data_structures#Data_types" class="type">&lt;any&gt;</a></li>
<li><code>message</code> <a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Data_structures#String_type" class="type">&lt;string&gt;</a> | <a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Error" class="type">&lt;Error&gt;</a></li>
</ul>
<p>Tests if <code>value</code> is truthy. It is equivalent to
<code>assert.equal(!!value, true, message)</code>.</p>
<p>If <code>value</code> is not truthy, an <code>AssertionError</code> is thrown with a <code>message</code>
property set equal to the value of the <code>message</code> parameter. If the <code>message</code>
parameter is <code>undefined</code>, a default error message is assigned. If the <code>message</code>
parameter is an instance of an <a href="https://nodejs.org/api/errors.html#errors_class_error"><code>Error</code></a> then it will be thrown instead of the
<code>AssertionError</code>.
If no arguments are passed in at all <code>message</code> will be set to the string:
<code>'No value argument passed to `assert.ok()`'</code>.</p>
<p>Be aware that in the <code>repl</code> the error message will be different to the one
thrown in a file! See below for further details.</p>
<pre><code class="language-js">const assert = require('assert').strict;

assert.ok(true);
// OK
assert.ok(1);
// OK

assert.ok();
// AssertionError: No value argument passed to `assert.ok()`

assert.ok(false, 'it\'s false');
// AssertionError: it's false

// In the repl:
assert.ok(typeof 123 === 'string');
// AssertionError: false == true

// In a file (e.g. test.js):
assert.ok(typeof 123 === 'string');
// AssertionError: The expression evaluated to a falsy value:
//
//   assert.ok(typeof 123 === 'string')

assert.ok(false);
// AssertionError: The expression evaluated to a falsy value:
//
//   assert.ok(false)

assert.ok(0);
// AssertionError: The expression evaluated to a falsy value:
//
//   assert.ok(0)

// Using `assert()` works the same:
assert(0);
// AssertionError: The expression evaluated to a falsy value:
//
//   assert(0)
</code></pre>
<h2>assert.rejects(asyncFn[, error][, message])<a class="srclink" href="https://github.com/nodejs/node/blob/3a2e75d9a5c31d20e429d505b82dd182e33f459a/lib/assert.js#L780">[src]</a><span><a class="mark" href="#assert_assert_rejects_asyncfn_error_message" id="assert_assert_rejects_asyncfn_error_message">#</a></span></h2>
<div class="api_metadata">
<span>Added in: v10.0.0</span>
</div>
<ul>
<li><code>asyncFn</code> <a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Function" class="type">&lt;Function&gt;</a> | <a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Promise" class="type">&lt;Promise&gt;</a></li>
<li><code>error</code> <a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/RegExp" class="type">&lt;RegExp&gt;</a> | <a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Function" class="type">&lt;Function&gt;</a> | <a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object" class="type">&lt;Object&gt;</a> | <a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Error" class="type">&lt;Error&gt;</a></li>
<li><code>message</code> <a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Data_structures#String_type" class="type">&lt;string&gt;</a></li>
</ul>
<p>Awaits the <code>asyncFn</code> promise or, if <code>asyncFn</code> is a function, immediately
calls the function and awaits the returned promise to complete. It will then
check that the promise is rejected.</p>
<p>If <code>asyncFn</code> is a function and it throws an error synchronously,
<code>assert.rejects()</code> will return a rejected <code>Promise</code> with that error. If the
function does not return a promise, <code>assert.rejects()</code> will return a rejected
<code>Promise</code> with an <a href="https://nodejs.org/api/errors.html#errors_err_invalid_return_value"><code>ERR_INVALID_RETURN_VALUE</code></a> error. In both cases the error
handler is skipped.</p>
<p>Besides the async nature to await the completion behaves identically to
<a href="#assert_assert_throws_fn_error_message"><code>assert.throws()</code></a>.</p>
<p>If specified, <code>error</code> can be a <a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Classes"><code>Class</code></a>, <a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Regular_Expressions"><code>RegExp</code></a>, a validation function,
an object where each property will be tested for, or an instance of error where
each property will be tested for including the non-enumerable <code>message</code> and
<code>name</code> properties.</p>
<p>If specified, <code>message</code> will be the message provided by the <code>AssertionError</code> if
the <code>asyncFn</code> fails to reject.</p>
<pre><code class="language-js">(async () =&gt; {
  await assert.rejects(
    async () =&gt; {
      throw new TypeError('Wrong value');
    },
    {
      name: 'TypeError',
      message: 'Wrong value'
    }
  );
})();
</code></pre>
<pre><code class="language-js">assert.rejects(
  Promise.reject(new Error('Wrong value')),
  Error
).then(() =&gt; {
  // ...
});
</code></pre>
<p><code>error</code> cannot be a string. If a string is provided as the second
argument, then <code>error</code> is assumed to be omitted and the string will be used for
<code>message</code> instead. This can lead to easy-to-miss mistakes. Please read the
example in <a href="#assert_assert_throws_fn_error_message"><code>assert.throws()</code></a> carefully if using a string as the second
argument gets considered.</p>
<h2>assert.strictEqual(actual, expected[, message])<a class="srclink" href="https://github.com/nodejs/node/blob/3a2e75d9a5c31d20e429d505b82dd182e33f459a/lib/assert.js#L488">[src]</a><span><a class="mark" href="#assert_assert_strictequal_actual_expected_message" id="assert_assert_strictequal_actual_expected_message">#</a></span></h2>
<div class="api_metadata">
<details class="changelog"><summary>History</summary>
<table>
<tbody><tr><th>Version</th><th>Changes</th></tr>
<tr><td>v10.0.0</td>
<td><p>Used comparison changed from Strict Equality to <code>Object.is()</code></p></td></tr>
<tr><td>v0.1.21</td>
<td><p><span>Added in: v0.1.21</span></p></td></tr>
</tbody></table>
</details>
</div>
<ul>
<li><code>actual</code> <a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Data_structures#Data_types" class="type">&lt;any&gt;</a></li>
<li><code>expected</code> <a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Data_structures#Data_types" class="type">&lt;any&gt;</a></li>
<li><code>message</code> <a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Data_structures#String_type" class="type">&lt;string&gt;</a> | <a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Error" class="type">&lt;Error&gt;</a></li>
</ul>
<p>Tests strict equality between the <code>actual</code> and <code>expected</code> parameters as
determined by the <a href="https://tc39.github.io/ecma262/#sec-samevalue">SameValue Comparison</a>.</p>
<pre><code class="language-js">const assert = require('assert').strict;

assert.strictEqual(1, 2);
// AssertionError [ERR_ASSERTION]: Expected inputs to be strictly equal:
//
// 1 !== 2

assert.strictEqual(1, 1);
// OK

assert.strictEqual('Hello foobar', 'Hello World!');
// AssertionError [ERR_ASSERTION]: Expected inputs to be strictly equal:
// + actual - expected
//
// + 'Hello foobar'
// - 'Hello World!'
//          ^

const apples = 1;
const oranges = 2;
assert.strictEqual(apples, oranges, `apples ${apples} !== oranges ${oranges}`);
// AssertionError [ERR_ASSERTION]: apples 1 !== oranges 2

assert.strictEqual(1, '1', new TypeError('Inputs are not identical'));
// TypeError: Inputs are not identical
</code></pre>
<p>If the values are not strictly equal, an <code>AssertionError</code> is thrown with a
<code>message</code> property set equal to the value of the <code>message</code> parameter. If the
<code>message</code> parameter is undefined, a default error message is assigned. If the
<code>message</code> parameter is an instance of an <a href="https://nodejs.org/api/errors.html#errors_class_error"><code>Error</code></a> then it will be thrown
instead of the <code>AssertionError</code>.</p>
<h2>assert.throws(fn[, error][, message])<a class="srclink" href="https://github.com/nodejs/node/blob/3a2e75d9a5c31d20e429d505b82dd182e33f459a/lib/assert.js#L776">[src]</a><span><a class="mark" href="#assert_assert_throws_fn_error_message" id="assert_assert_throws_fn_error_message">#</a></span></h2>
<div class="api_metadata">
<details class="changelog"><summary>History</summary>
<table>
<tbody><tr><th>Version</th><th>Changes</th></tr>
<tr><td>v10.2.0</td>
<td><p>The <code>error</code> parameter can be an object containing regular expressions now.</p></td></tr>
<tr><td>v9.9.0</td>
<td><p>The <code>error</code> parameter can now be an object as well.</p></td></tr>
<tr><td>v4.2.0</td>
<td><p>The <code>error</code> parameter can now be an arrow function.</p></td></tr>
<tr><td>v0.1.21</td>
<td><p><span>Added in: v0.1.21</span></p></td></tr>
</tbody></table>
</details>
</div>
<ul>
<li><code>fn</code> <a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Function" class="type">&lt;Function&gt;</a></li>
<li><code>error</code> <a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/RegExp" class="type">&lt;RegExp&gt;</a> | <a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Function" class="type">&lt;Function&gt;</a> | <a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object" class="type">&lt;Object&gt;</a> | <a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Error" class="type">&lt;Error&gt;</a></li>
<li><code>message</code> <a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Data_structures#String_type" class="type">&lt;string&gt;</a></li>
</ul>
<p>Expects the function <code>fn</code> to throw an error.</p>
<p>If specified, <code>error</code> can be a <a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Classes"><code>Class</code></a>, <a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Regular_Expressions"><code>RegExp</code></a>, a validation function,
a validation object where each property will be tested for strict deep equality,
or an instance of error where each property will be tested for strict deep
equality including the non-enumerable <code>message</code> and <code>name</code> properties. When
using an object, it is also possible to use a regular expression, when
validating against a string property. See below for examples.</p>
<p>If specified, <code>message</code> will be appended to the message provided by the
<code>AssertionError</code> if the <code>fn</code> call fails to throw or in case the error validation
fails.</p>
<p>Custom validation object/error instance:</p>
<pre><code class="language-js">const err = new TypeError('Wrong value');
err.code = 404;
err.foo = 'bar';
err.info = {
  nested: true,
  baz: 'text'
};
err.reg = /abc/i;

assert.throws(
  () =&gt; {
    throw err;
  },
  {
    name: 'TypeError',
    message: 'Wrong value',
    info: {
      nested: true,
      baz: 'text'
    }
    // Only properties on the validation object will be tested for.
    // Using nested objects requires all properties to be present. Otherwise
    // the validation is going to fail.
  }
);

// Using regular expressions to validate error properties:
assert.throws(
  () =&gt; {
    throw err;
  },
  {
    // The `name` and `message` properties are strings and using regular
    // expressions on those will match against the string. If they fail, an
    // error is thrown.
    name: /^TypeError$/,
    message: /Wrong/,
    foo: 'bar',
    info: {
      nested: true,
      // It is not possible to use regular expressions for nested properties!
      baz: 'text'
    },
    // The `reg` property contains a regular expression and only if the
    // validation object contains an identical regular expression, it is going
    // to pass.
    reg: /abc/i
  }
);

// Fails due to the different `message` and `name` properties:
assert.throws(
  () =&gt; {
    const otherErr = new Error('Not found');
    otherErr.code = 404;
    throw otherErr;
  },
  err // This tests for `message`, `name` and `code`.
);
</code></pre>
<p>Validate instanceof using constructor:</p>
<pre><code class="language-js">assert.throws(
  () =&gt; {
    throw new Error('Wrong value');
  },
  Error
);
</code></pre>
<p>Validate error message using <a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Regular_Expressions"><code>RegExp</code></a>:</p>
<p>Using a regular expression runs <code>.toString</code> on the error object, and will
therefore also include the error name.</p>
<pre><code class="language-js">assert.throws(
  () =&gt; {
    throw new Error('Wrong value');
  },
  /^Error: Wrong value$/
);
</code></pre>
<p>Custom error validation:</p>
<pre><code class="language-js">assert.throws(
  () =&gt; {
    throw new Error('Wrong value');
  },
  (err) =&gt; {
    assert(err instanceof Error);
    assert(/value/.test(err));
    // Returning anything from validation functions besides `true` is not
    // recommended. Doing so results in the caught error being thrown again.
    // That is usually not the desired outcome. Throw an error about the
    // specific validation that failed instead (as done in this example).
    return true;
  },
  'unexpected error'
);
</code></pre>
<p><code>error</code> cannot be a string. If a string is provided as the second
argument, then <code>error</code> is assumed to be omitted and the string will be used for
<code>message</code> instead. This can lead to easy-to-miss mistakes. Using the same
message as the thrown error message is going to result in an
<code>ERR_AMBIGUOUS_ARGUMENT</code> error. Please read the example below carefully if using
a string as the second argument gets considered:</p>
<!-- eslint-disable no-restricted-syntax -->
<pre><code class="language-js">function throwingFirst() {
  throw new Error('First');
}
function throwingSecond() {
  throw new Error('Second');
}
function notThrowing() {}

// The second argument is a string and the input function threw an Error.
// The first case will not throw as it does not match for the error message
// thrown by the input function!
assert.throws(throwingFirst, 'Second');
// In the next example the message has no benefit over the message from the
// error and since it is not clear if the user intended to actually match
// against the error message, Node.js throws an `ERR_AMBIGUOUS_ARGUMENT` error.
assert.throws(throwingSecond, 'Second');
// TypeError [ERR_AMBIGUOUS_ARGUMENT]

// The string is only used (as message) in case the function does not throw:
assert.throws(notThrowing, 'Second');
// AssertionError [ERR_ASSERTION]: Missing expected exception: Second

// If it was intended to match for the error message do this instead:
// It does not throw because the error messages match.
assert.throws(throwingSecond, /Second$/);

// If the error message does not match, the error from within the function is
// not caught.
assert.throws(throwingFirst, /Second$/);
// Error: First
//     at throwingFirst (repl:2:9)
</code></pre>
<p>Due to the confusing notation, it is recommended not to use a string as the
second argument. This might lead to difficult-to-spot errors.</p>
      </div>
    </div>
  </div>
  <script src="data:application/javascript;base64,/*
SHJS - Syntax Highlighting in JavaScript
Copyright (C) 2007, 2008 gnombat@users.sourceforge.net
License: http://shjs.sourceforge.net/doc/gplv3.html
*/

if (! this.sh_languages) {
  this.sh_languages = {};
}
var sh_requests = {};

function sh_isEmailAddress(url) {
  if (/^mailto:/.test(url)) {
    return false;
  }
  return url.indexOf('@') !== -1;
}

function sh_setHref(tags, numTags, inputString) {
  var url = inputString.substring(tags[numTags - 2].pos, tags[numTags - 1].pos);
  if (url.length >= 2 && url.charAt(0) === '<' && url.charAt(url.length - 1) === '>') {
    url = url.substr(1, url.length - 2);
  }
  if (sh_isEmailAddress(url)) {
    url = 'mailto:' + url;
  }
  tags[numTags - 2].node.href = url;
}

/*
Konqueror has a bug where the regular expression /$/g will not match at the end
of a line more than once:

  var regex = /$/g;
  var match;

  var line = '1234567890';
  regex.lastIndex = 10;
  match = regex.exec(line);

  var line2 = 'abcde';
  regex.lastIndex = 5;
  match = regex.exec(line2);  // fails
*/
function sh_konquerorExec(s) {
  var result = [''];
  result.index = s.length;
  result.input = s;
  return result;
}

/**
Highlights all elements containing source code in a text string.  The return
value is an array of objects, each representing an HTML start or end tag.  Each
object has a property named pos, which is an integer representing the text
offset of the tag. Every start tag also has a property named node, which is the
DOM element started by the tag. End tags do not have this property.
@param  inputString  a text string
@param  language  a language definition object
@return  an array of tag objects
*/
function sh_highlightString(inputString, language) {
  if (/Konqueror/.test(navigator.userAgent)) {
    if (! language.konquered) {
      for (var s = 0; s < language.length; s++) {
        for (var p = 0; p < language[s].length; p++) {
          var r = language[s][p][0];
          if (r.source === '$') {
            r.exec = sh_konquerorExec;
          }
        }
      }
      language.konquered = true;
    }
  }

  var a = document.createElement('a');
  var span = document.createElement('span');

  // the result
  var tags = [];
  var numTags = 0;

  // each element is a pattern object from language
  var patternStack = [];

  // the current position within inputString
  var pos = 0;

  // the name of the current style, or null if there is no current style
  var currentStyle = null;

  var output = function(s, style) {
    var length = s.length;
    // this is more than just an optimization - we don't want to output empty <span></span> elements
    if (length === 0) {
      return;
    }
    if (! style) {
      var stackLength = patternStack.length;
      if (stackLength !== 0) {
        var pattern = patternStack[stackLength - 1];
        // check whether this is a state or an environment
        if (! pattern[3]) {
          // it's not a state - it's an environment; use the style for this environment
          style = pattern[1];
        }
      }
    }
    if (currentStyle !== style) {
      if (currentStyle) {
        tags[numTags++] = {pos: pos};
        if (currentStyle === 'sh_url') {
          sh_setHref(tags, numTags, inputString);
        }
      }
      if (style) {
        var clone;
        if (style === 'sh_url') {
          clone = a.cloneNode(false);
        }
        else {
          clone = span.cloneNode(false);
        }
        clone.className = style;
        tags[numTags++] = {node: clone, pos: pos};
      }
    }
    pos += length;
    currentStyle = style;
  };

  var endOfLinePattern = /\r\n|\r|\n/g;
  endOfLinePattern.lastIndex = 0;
  var inputStringLength = inputString.length;
  while (pos < inputStringLength) {
    var start = pos;
    var end;
    var startOfNextLine;
    var endOfLineMatch = endOfLinePattern.exec(inputString);
    if (endOfLineMatch === null) {
      end = inputStringLength;
      startOfNextLine = inputStringLength;
    }
    else {
      end = endOfLineMatch.index;
      startOfNextLine = endOfLinePattern.lastIndex;
    }

    var line = inputString.substring(start, end);

    var matchCache = [];
    for (;;) {
      var posWithinLine = pos - start;

      var stateIndex;
      var stackLength = patternStack.length;
      if (stackLength === 0) {
        stateIndex = 0;
      }
      else {
        // get the next state
        stateIndex = patternStack[stackLength - 1][2];
      }

      var state = language[stateIndex];
      var numPatterns = state.length;
      var mc = matchCache[stateIndex];
      if (! mc) {
        mc = matchCache[stateIndex] = [];
      }
      var bestMatch = null;
      var bestPatternIndex = -1;
      for (var i = 0; i < numPatterns; i++) {
        var match;
        if (i < mc.length && (mc[i] === null || posWithinLine <= mc[i].index)) {
          match = mc[i];
        }
        else {
          var regex = state[i][0];
          regex.lastIndex = posWithinLine;
          match = regex.exec(line);
          mc[i] = match;
        }
        if (match !== null && (bestMatch === null || match.index < bestMatch.index)) {
          bestMatch = match;
          bestPatternIndex = i;
          if (match.index === posWithinLine) {
            break;
          }
        }
      }

      if (bestMatch === null) {
        output(line.substring(posWithinLine), null);
        break;
      }
      else {
        // got a match
        if (bestMatch.index > posWithinLine) {
          output(line.substring(posWithinLine, bestMatch.index), null);
        }

        var pattern = state[bestPatternIndex];

        var newStyle = pattern[1];
        var matchedString;
        if (newStyle instanceof Array) {
          for (var subexpression = 0; subexpression < newStyle.length; subexpression++) {
            matchedString = bestMatch[subexpression + 1];
            output(matchedString, newStyle[subexpression]);
          }
        }
        else {
          matchedString = bestMatch[0];
          output(matchedString, newStyle);
        }

        switch (pattern[2]) {
        case -1:
          // do nothing
          break;
        case -2:
          // exit
          patternStack.pop();
          break;
        case -3:
          // exitall
          patternStack.length = 0;
          break;
        default:
          // this was the start of a delimited pattern or a state/environment
          patternStack.push(pattern);
          break;
        }
      }
    }

    // end of the line
    if (currentStyle) {
      tags[numTags++] = {pos: pos};
      if (currentStyle === 'sh_url') {
        sh_setHref(tags, numTags, inputString);
      }
      currentStyle = null;
    }
    pos = startOfNextLine;
  }

  return tags;
}

////////////////////////////////////////////////////////////////////////////////
// DOM-dependent functions

function sh_getClasses(element) {
  var result = [];
  var htmlClass = element.className;
  if (htmlClass && htmlClass.length > 0) {
    var htmlClasses = htmlClass.split(' ');
    for (var i = 0; i < htmlClasses.length; i++) {
      if (htmlClasses[i].length > 0) {
        result.push(htmlClasses[i]);
      }
    }
  }
  return result;
}

function sh_addClass(element, name) {
  var htmlClasses = sh_getClasses(element);
  for (var i = 0; i < htmlClasses.length; i++) {
    if (name.toLowerCase() === htmlClasses[i].toLowerCase()) {
      return;
    }
  }
  htmlClasses.push(name);
  element.className = htmlClasses.join(' ');
}

/**
Extracts the tags from an HTML DOM NodeList.
@param  nodeList  a DOM NodeList
@param  result  an object with text, tags and pos properties
*/
function sh_extractTagsFromNodeList(nodeList, result) {
  var length = nodeList.length;
  for (var i = 0; i < length; i++) {
    var node = nodeList.item(i);
    switch (node.nodeType) {
    case 1:
      if (node.nodeName.toLowerCase() === 'br') {
        var terminator;
        if (/MSIE/.test(navigator.userAgent)) {
          terminator = '\r';
        }
        else {
          terminator = '\n';
        }
        result.text.push(terminator);
        result.pos++;
      }
      else {
        result.tags.push({node: node.cloneNode(false), pos: result.pos});
        sh_extractTagsFromNodeList(node.childNodes, result);
        result.tags.push({pos: result.pos});
      }
      break;
    case 3:
    case 4:
      result.text.push(node.data);
      result.pos += node.length;
      break;
    }
  }
}

/**
Extracts the tags from the text of an HTML element. The extracted tags will be
returned as an array of tag objects. See sh_highlightString for the format of
the tag objects.
@param  element  a DOM element
@param  tags  an empty array; the extracted tag objects will be returned in it
@return  the text of the element
@see  sh_highlightString
*/
function sh_extractTags(element, tags) {
  var result = {};
  result.text = [];
  result.tags = tags;
  result.pos = 0;
  sh_extractTagsFromNodeList(element.childNodes, result);
  return result.text.join('');
}

/**
Merges the original tags from an element with the tags produced by highlighting.
@param  originalTags  an array containing the original tags
@param  highlightTags  an array containing the highlighting tags - these must not overlap
@result  an array containing the merged tags
*/
function sh_mergeTags(originalTags, highlightTags) {
  var numOriginalTags = originalTags.length;
  if (numOriginalTags === 0) {
    return highlightTags;
  }

  var numHighlightTags = highlightTags.length;
  if (numHighlightTags === 0) {
    return originalTags;
  }

  var result = [];
  var originalIndex = 0;
  var highlightIndex = 0;

  while (originalIndex < numOriginalTags && highlightIndex < numHighlightTags) {
    var originalTag = originalTags[originalIndex];
    var highlightTag = highlightTags[highlightIndex];

    if (originalTag.pos <= highlightTag.pos) {
      result.push(originalTag);
      originalIndex++;
    }
    else {
      result.push(highlightTag);
      if (highlightTags[highlightIndex + 1].pos <= originalTag.pos) {
        highlightIndex++;
        result.push(highlightTags[highlightIndex]);
        highlightIndex++;
      }
      else {
        // new end tag
        result.push({pos: originalTag.pos});

        // new start tag
        highlightTags[highlightIndex] = {node: highlightTag.node.cloneNode(false), pos: originalTag.pos};
      }
    }
  }

  while (originalIndex < numOriginalTags) {
    result.push(originalTags[originalIndex]);
    originalIndex++;
  }

  while (highlightIndex < numHighlightTags) {
    result.push(highlightTags[highlightIndex]);
    highlightIndex++;
  }

  return result;
}

/**
Inserts tags into text.
@param  tags  an array of tag objects
@param  text  a string representing the text
@return  a DOM DocumentFragment representing the resulting HTML
*/
function sh_insertTags(tags, text) {
  var doc = document;

  var result = document.createDocumentFragment();
  var tagIndex = 0;
  var numTags = tags.length;
  var textPos = 0;
  var textLength = text.length;
  var currentNode = result;

  // output one tag or text node every iteration
  while (textPos < textLength || tagIndex < numTags) {
    var tag;
    var tagPos;
    if (tagIndex < numTags) {
      tag = tags[tagIndex];
      tagPos = tag.pos;
    }
    else {
      tagPos = textLength;
    }

    if (tagPos <= textPos) {
      // output the tag
      if (tag.node) {
        // start tag
        var newNode = tag.node;
        currentNode.appendChild(newNode);
        currentNode = newNode;
      }
      else {
        // end tag
        currentNode = currentNode.parentNode;
      }
      tagIndex++;
    }
    else {
      // output text
      currentNode.appendChild(doc.createTextNode(text.substring(textPos, tagPos)));
      textPos = tagPos;
    }
  }

  return result;
}

/**
Highlights an element containing source code.  Upon completion of this function,
the element will have been placed in the "sh_sourceCode" class.
@param  element  a DOM <pre> element containing the source code to be highlighted
@param  language  a language definition object
*/
function sh_highlightElement(element, language) {
  sh_addClass(element, 'sh_sourceCode');
  var originalTags = [];
  var inputString = sh_extractTags(element, originalTags);
  var highlightTags = sh_highlightString(inputString, language);
  var tags = sh_mergeTags(originalTags, highlightTags);
  var documentFragment = sh_insertTags(tags, inputString);
  while (element.hasChildNodes()) {
    element.removeChild(element.firstChild);
  }
  element.appendChild(documentFragment);
}

function sh_getXMLHttpRequest() {
  if (window.ActiveXObject) {
    return new ActiveXObject('Msxml2.XMLHTTP');
  }
  else if (window.XMLHttpRequest) {
    return new XMLHttpRequest();
  }
  throw 'No XMLHttpRequest implementation available';
}

function sh_load(language, element, prefix, suffix) {
  if (language in sh_requests) {
    sh_requests[language].push(element);
    return;
  }
  sh_requests[language] = [element];
  var request = sh_getXMLHttpRequest();
  var url = prefix + 'sh_' + language + suffix;
  request.open('GET', url, true);
  request.onreadystatechange = function () {
    if (request.readyState === 4) {
      try {
        if (! request.status || request.status === 200) {
          eval(request.responseText);
          var elements = sh_requests[language];
          for (var i = 0; i < elements.length; i++) {
            sh_highlightElement(elements[i], sh_languages[language]);
          }
        }
        else {
          throw 'HTTP error: status ' + request.status;
        }
      }
      finally {
        request = null;
      }
    }
  };
  request.send(null);
}

/**
Highlights all elements containing source code on the current page. Elements
containing source code must be "pre" elements with a "class" attribute of
"sh_LANGUAGE", where LANGUAGE is a valid language identifier; e.g., "sh_java"
identifies the element as containing "java" language source code.
*/
function highlight(prefix, suffix, tag) {
  var nodeList = document.getElementsByTagName(tag);
  for (var i = 0; i < nodeList.length; i++) {
    var element = nodeList.item(i);
    var htmlClasses = sh_getClasses(element);
    var highlighted = false;
    var donthighlight = false;
    for (var j = 0; j < htmlClasses.length; j++) {
      var htmlClass = htmlClasses[j].toLowerCase();
      if (htmlClass === 'sh_none') {
        donthighlight = true
        continue;
      }
      if (htmlClass.substr(0, 3) === 'sh_') {
        var language = htmlClass.substring(3);
        if (language in sh_languages) {
          sh_highlightElement(element, sh_languages[language]);
          highlighted = true;
        }
        else if (typeof(prefix) === 'string' && typeof(suffix) === 'string') {
          sh_load(language, element, prefix, suffix);
        }
        else {
          throw 'Found <' + tag + '> element with class="' + htmlClass + '", but no such language exists';
        }
        break;
      }
    }
    if (highlighted === false && donthighlight == false) {
      sh_highlightElement(element, sh_languages["javascript"]);
    }
  }
}



function sh_highlightDocument(prefix, suffix) {
  highlight(prefix, suffix, 'tt');
  highlight(prefix, suffix, 'code');
  highlight(prefix, suffix, 'pre');
}
"></script>
  <script src="data:application/javascript;base64,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"></script>
  <script>highlight(undefined, undefined, 'pre');</script>


</body></html>