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Jasmine Core 4.0.0 Release Notes


This is a major release. In addition to new features and bug fixes it contains a number of breaking changes that are intended to diagnose common errors, improve awkward or outdated APIs, and make Jasmine easier to maintain and contribute to. If you're upgrading from Jasmine 3.x, we recommend installing 3.99 and fixing any deprecation warnings that it emits before updating to 4.0. Please see the migration guide for more information. If you use the jasmine or jasmine-browser-runner NPM packages, please read the release notes for those packages as well.


  • Obsolete environments, most notably Internet Explorer, are no longer supported. Jasmine now expects to run in an environment that provides most of ES2017 and, in the case of Node, good interoperability between CommonJS modules and ES modules.

  • The Jasmine packages for Ruby and Python have been discontinued.

  • Errors in beforeAll and beforeEach functions are handled better.

  • Jasmine can optionally be used without creating globals in Node.

  • Certain common async testing bugs are now reported as errors.

  • A new debug logging feature makes it easier to debug failing specs, particularly intermittent failures.

See details below.

Breaking changes

Changes to supported environments

The following previously supported environments are no longer supported:

  • Internet Explorer
  • PhantomJS
  • Safari 8-13
  • Firefox 68 and 78
  • Node 10 and 12.0-12.16
  • Python
  • Ruby
  • Bower

Although Jasmine 4.0 may still work in some of those environments, we no longer test against them and won't try to maintain compatibility with them in future 4.x releases.

The jasmine-browser-runner NPM package is the direct replacement for the jasmine Ruby and Python packages.

Changes that affect how specs are written

  • When a beforeAll function fails in any way other than a failed expectation, Jasmine will not run the contents of the suite or any child suites except for any afterAll functions defined in the same suite as the failed beforeAll function. All affected specs will still be reported as failed. See #1533.

  • When a beforeEach function fails in any way other than a failed expectation, Jasmine will skip any subsequent beforeEach functions, the corresponding spec, and any afterEach functions defined in child suites. afterEach functions defined at the same or higher levels will still run. The spec will still be reported as failed. See #1533.

  • MatchersUtil#contains and the toContain matcher use deep equality rather than === to compare set members. This matches how arrays are handled but may cause some previously passing .not.toContain() expectations to fail.

  • jasmine.clock().mockDate() throws if its argument is not a Date. Previous versions ignored non-Date arguments.

  • Multiple calls to an asynchronous function's done callback are treated as errors.

  • Any argument passed to a done callback (other than undefined) is treated as an error. Previous versions ignored any argument that wasn't an Error instance.

  • Jasmine will report an error rather than a warning when a function tries to combine two different forms of async (e.g. taking a callback and also returning a promise).

  • this in describe functions is no longer a Suite object.

  • Empty suites are treated as errors.

    • Merges #1742 from @johnjbarton
  • The current time value does not decrease when jasmine.clock().tick() is called from a setTimeout or setInterval callback.

Changes to how Jasmine is configured

  • Individual configuration property getters and setters such as Env#randomTests and Env#randomizeTests have been removed. Use Env#configuration and Env#configure instead.

  • The failFast and oneFailurePerSpec configuration properties have been removed. Use stopOnSpecFailure and stopSpecOnExpectationFailure instead.

  • The Promise configuration property has been removed. Jasmine can still consume non-native promises but will always use the global Promise to create promises.

Changes that affect custom matchers

  • The old style of using custom equality testers, where matchers received them from Jasmine and had to pass them back to matchersUtil methods, is no longer supported.

  • matchersUtil and pp are no longer available globally. Instead, use the instances that are passed to custom matcher factories and to jasmineToString.

See the migration guide for more information about these changes and how to update custom matchers that use the old APIs.

Changes that affect custom reporters

  • The Suite and Spec objects returned from describe, it, and Env#topSuite no longer expose private APIs.

Other breaking changes

  • boot.js is no longer included. Use boot0.js and boot1.js instead.
  • Boot files in lib/jasmine-core/boot are no longer included in the NPM package. Use the boot files in lib/jasmine-core instead.
  • json2.js is no longer included, since all supported environments provide a JSON parser.

Other new features and bug fixes

  • Jasmine can optionally be used without creating globals in Node.js.

  • Custom spy strategies are inherited from parent suites like other runnable resources.

  • pending() can now be called from beforeEach functions.

  • Removed duplicate message from errors (including. matcher failures) in V8-based environments.

  • Spy#withArgs supports custom equality testers.

  • The promise returned by Env#execute is resolved to the jasmineDoneInfo.

  • Fixed stack trace filtering on Safari 15.

  • The HTML reporter includes top suite failures in the reported failure count.

  • afterAll functions are run after a failure even if the stopOnSpecFailure config property is set.

  • Added a debug logging feature to make it easier to debug failing specs.

    • Call jasmine#debugLog during spec execution to add a log entry.
    • If the spec fails, log entries are reported as part of the specDone reporter event.
  • The HTML reporter no longer says that expectations occurring after the spec finishes are AfterAll errors.

Documentation updates

Supported environments

jasmine-core 4.0.0 has been tested in the following environments.

Environment Supported versions
Node 12.17+, 14, 16
Safari 14-15
Chrome 96
Firefox 91, 95
Edge 96

_Release Notes generated with Anchorman