Fix CI tests (#294)

* Update package-lock.json file

* Fix broken tests in blank.spec.js

Blank binary file was not getting serialized as { type: "Buffer", data: [] }
because read(file) was returning a string instead of Buffer.

* Fix webpack error when running browser tests

Webpack 4 cannot parse module containing optional chaining operator.
See https://stackoverflow.com/questions/59972341/how-to-make-webpack-accept-optional-chaining-without-babel

* Fix tests in invalid.spec.js when running in Chrome

* Change statusCode to status

* Set the --openssl-legacy-provider flag when running browser tests

Recent versions of node upgraded to OpenSSL 3.0, which deprecated some
older crypto hashing algorithms including md4.

Webpack 4 hard codes the use of md4 ins some places, so we have to set this
flag until we can upgrade Webpack.

* Use isomorphic-fetch instead of node-fetch

Browser tests were failing as polyfill.js was loading a node package in a browser context.

* Increase minimum version of node to 17

This was when the --openssl-legacy-provider option was introduced.
Prior versions of node do not recognize this option.

* Add chokidar@3 as an explicit dev dependency

Browser tests are failing in the CI environment with:
chokidar@3: Error: Cannot find module 'chokidar'

Don't know why but this thread might be relevant:
facebook/create-react-app#10811

* Skip test assertion due to conflict on Windows

See also #286

* Explicitly define browsers and plugins in karma.conf.js

* Replace karma-edge-launcher with newer package

.github/workflows/CI-CD.yaml

@@ -25,7 +25,7 @@ jobs:
           - macos-latest
           - windows-latest
         node:
-          - 14
+          - 17
           - lts/*
           - current
 

karma.conf.js

@@ -4,18 +4,70 @@
 
 "use strict";
 
-const { karmaConfig } = require("@jsdevtools/karma-config");
+const nodeUtil = require("util");
+const { buildConfig } = require("@jsdevtools/karma-config");
 const { host } = require("@jsdevtools/host-environment");
 
-module.exports = karmaConfig({
-  sourceDir: "lib",
-  fixtures: "test/fixtures/**/*.js",
-  browsers: {
-    chrome: host.ci ? host.os.linux : true,
-    firefox: host.ci ? host.os.linux : true,
-    // TODO these were disabled as unstable. should we remove saucelabs or what?
-    // safari: host.ci ? host.os.linux : host.os.mac,    // SauceLabs in CI
-    edge: host.ci ? host.os.linux : host.os.windows,  // SauceLabs in CI
-    // ie: host.ci ? host.os.windows : false,  // IE needs to run by itself, due to Babel transforms
-  },
-});
+module.exports = (karma) => {
+
+  const browsers = [];
+  const CI = isCI();
+  browsers.push(CI ? "ChromeHeadless" : "Chrome");
+  browsers.push(CI ? "FirefoxHeadless" : "Firefox");
+  host.os.mac && browsers.push("Safari");
+  host.os.windows && browsers.push("Edge");
+
+  const plugins = [
+    require("@jsdevtools/karma-host-environment"),
+    require("karma-verbose-reporter"),
+    require("karma-mocha"),
+    require("karma-webpack"), 
+  ]
+  plugins.push(require("karma-chrome-launcher"))
+  plugins.push(require("karma-firefox-launcher"))
+  host.os.mac && plugins.push(require("karma-safari-launcher"))
+  host.os.windows && plugins.push(require("@chiragrupani/karma-chromium-edge-launcher"))
+  plugins.push(require("karma-coverage-istanbul-reporter"))
+
+  const config = buildConfig({
+    sourceDir: "lib",
+    fixtures: "test/fixtures/**/*.js",
+    browsers: {
+      chrome: true,
+      firefox: true,
+      safari: host.os.mac,
+      edge: host.os.windows,
+      ie: false
+    },
+    config: {
+      browsers: browsers,
+      plugins: plugins
+    }
+  });
+
+  if (config.logLevel !== karma.LOG_DISABLE) {
+    console.debug("Karma Config:\n", nodeUtil.inspect(config, {
+      depth: 10,
+      colors: true,
+      compact: false,
+    }));
+  }
+
+  karma.set(config);
+};
+
+function isCI() {
+  let CI = environmentFlag("CI");
+  let karmaCI = environmentFlag("KARMA_CI");
+
+  return Boolean(CI || karmaCI || host.ci);
+};
+
+function environmentFlag(name) {
+  let value = environmentVariable(name);
+  return !["", "false", "off", "no"].includes(value);
+}
+
+function environmentVariable(name) {
+  return (process.env[name] || "").trim().toLowerCase();
+}

lib/refs.js

@@ -4,7 +4,7 @@ const { ono } = require("@jsdevtools/ono");
 const $Ref = require("./ref");
 const url = require("./util/url");
 
-const isWindows = /^win/.test(globalThis.process?.platform);
+const isWindows = /^win/.test(globalThis.process ? globalThis.process.platform : undefined);
 const getPathFromOs = filePath => isWindows ? filePath.replace(/\\/g, "/") : filePath;
 
 module.exports = $Refs;

lib/resolvers/http.js

@@ -68,7 +68,7 @@ module.exports = {
    * @param {object} file           - An object containing information about the referenced file
    * @param {string} file.url       - The full URL of the referenced file
    * @param {string} file.extension - The lowercased file extension (e.g. ".txt", ".html", etc.)
-   * @returns {Promise<string>}
+   * @returns {Promise<Buffer>}
    */
   read (file) {
     let u = url.parse(file.url);
@@ -89,7 +89,7 @@ module.exports = {
  * @param {object} httpOptions  - The `options.resolve.http` object
  * @param {number} [redirects]  - The redirect URLs that have already been followed
  *
- * @returns {Promise<string>}
+ * @returns {Promise<Buffer>}
  * The promise resolves with the raw downloaded data, or rejects if there is an HTTP error.
  */
 function download (u, httpOptions, redirects) {
@@ -99,25 +99,25 @@ function download (u, httpOptions, redirects) {
 
   return get(u, httpOptions)
     .then((res) => {
-      if (res.statusCode >= 400) {
-        throw ono({ status: res.statusCode }, `HTTP ERROR ${res.statusCode}`);
+      if (res.status >= 400) {
+        throw ono({ status: res.statusCode }, `HTTP ERROR ${res.status}`);
       }
-      else if (res.statusCode >= 300) {
+      else if (res.status >= 300) {
         if (redirects.length > httpOptions.redirects) {
-          throw new ResolverError(ono({ status: res.statusCode },
+          throw new ResolverError(ono({ status: res.status },
             `Error downloading ${redirects[0]}. \nToo many redirects: \n  ${redirects.join(" \n  ")}`));
         }
         else if (!res.headers.location) {
-          throw ono({ status: res.statusCode }, `HTTP ${res.statusCode} redirect with no location header`);
+          throw ono({ status: res.status }, `HTTP ${res.status} redirect with no location header`);
         }
         else {
-          // console.log('HTTP %d redirect %s -> %s', res.statusCode, u.href, res.headers.location);
+          // console.log('HTTP %d redirect %s -> %s', res.status, u.href, res.headers.location);
           let redirectTo = url.resolve(u, res.headers.location);
           return download(redirectTo, httpOptions, redirects);
         }
       }
       else {
-        return res.text();
+        return res.body ? res.arrayBuffer().then(buf => Buffer.from(buf)) : Buffer.alloc(0);
       }
     })
     .catch((err) => {

lib/util/url.js

@@ -3,7 +3,7 @@
 const nodePath = require("path");
 const projectDir = nodePath.resolve(__dirname, "..", "..");
 
-let isWindows = /^win/.test(globalThis.process?.platform),
+let isWindows = /^win/.test(globalThis.process ? globalThis.process.platform : undefined),
     forwardSlashPattern = /\//g,
     protocolPattern = /^(\w{2,}):\/\//i,
     url = module.exports,