Add `--detectOpenHandles` flag #6130

SimenB · 2018-05-04T07:05:17Z

Summary

Tracking down why Jest fails to exit at the end of a test run is a pain. Using tools like why-is-node-running is possible, but it requires some setup, and returns a ton of false positives. Baking it directly into Jest allows us to perform filtering on the output, to make sure only the relevant pieces are shown to the user.

This filtering is in this PR implemented as "does this._execModule( exist in the trace". This basically means a module executed by jest-runtime, but not Jest internals.

The following file will keep Jest running forever, because the server is never closed down:

require('express')().listen(3000);

With this PR, Jest will have the following output:

I added the data to testResults so other tooling should be able to report it as they wish as well.

EDIT: With some colors and relative paths:

Test plan

I haven't added any tests yet, as I'd like to get some feedback that this is acceptable before spending more time on it.

SimenB · 2018-05-04T07:13:32Z

packages/jest-cli/package.json

@@ -39,6 +40,9 @@
    "which": "^1.2.12",
    "yargs": "^11.0.0"
  },
+  "optionalDependencies": {
+    "why-is-node-running": "^2.0.2"


this needs Node 8 (uses async hooks), hoping sticking it in optionalDependencies is enough

if not, we could do the same thing detectLeaks does - require the user to install it themselves

What was the reason we didn't put weak in optional dependencies? Package managers tried to install it anyway?

The output was horrendous when it failed, and windows installs still crashed. See #5169

thymikee · 2018-05-04T07:32:11Z

packages/jest-cli/src/cli/index.js

+    const message =
+      chalk.red(
+        '\nJest has detected the following ' +
+          `${openHandles.length} open handles potentially keeping Jest from ` +


Maybe we can use pluralize? and rephrase to:

Jest has detected 1 open handle potentially preventing it from exiting:

We have our own pluralize in jest-matcher-utils. I can move it to jest-util, perhaps?

There's one in jest-cli too. Feel free to clean it up :D

ah didn't know about that one. I'll be lazy and just use it then

thymikee · 2018-05-04T07:35:05Z

packages/jest-cli/src/run_jest.js

@@ -67,26 +68,75 @@ const getTestPaths = async (
  });
 };

+function formatWhyRunning(whyRunning) {


maybe we can extract why-running-related logic to separate file?

yeah, good call. done

thymikee · 2018-05-04T07:35:23Z

packages/jest-cli/src/run_jest.js

+      return entry.split('\n').some(l => l.includes('this._execModule('));
+    })
+    .map(entry => {
+      const [title, ...lines] = entry.split('\n');


Dropping Node4 for good <3

I think we transpile this, but yeah 🎉

thymikee · 2018-05-04T07:38:20Z

packages/jest-cli/src/run_jest.js

+  if (whyRunning) {
+    runResults.openHandles = formatWhyRunning(whyRunning);
+  } else {
+    runResults.openHandles = [];


we can get rid of this check by assigning default value to whyRunning

meh, it gave me lots of flow issues

thymikee

LGTM, this is great 👍

thymikee · 2018-05-04T07:43:16Z

packages/jest-cli/src/cli/index.js

+          .map(({file, line}) => {
+            const relativeTestPath = slash(
+              path.relative(globalConfig.rootDir, file),
+            );


Do we want to slash this path? I'm not sure if it's possible to cmd/ctrl+click on Windows terminals, but this will probably not help. Just a guess though

we do the same with the normal stack traces. I can drop it here, if you think that's better?

codecov-io · 2018-05-04T07:50:57Z

Codecov Report

Merging #6130 into master will decrease coverage by 0.16%.
The diff coverage is 31.7%.

@@            Coverage Diff             @@
##           master    #6130      +/-   ##
==========================================
- Coverage   64.36%   64.19%   -0.17%     
==========================================
  Files         218      219       +1     
  Lines        8393     8423      +30     
  Branches        3        4       +1     
==========================================
+ Hits         5402     5407       +5     
- Misses       2990     3015      +25     
  Partials        1        1

Impacted Files	Coverage Δ
.../src/legacy_code_todo_rewrite/jest_adapter_init.js	`0% <ø> (ø)`	⬆️
packages/jest-config/src/index.js	`31.37% <ø> (ø)`	⬆️
packages/jest-config/src/defaults.js	`92.85% <ø> (ø)`	⬆️
packages/jest-cli/src/test_result_helpers.js	`12.5% <ø> (ø)`	⬆️
packages/jest-cli/src/test_scheduler.js	`37.89% <0%> (ø)`	⬆️
packages/jest-cli/src/get_node_handles.js	`0% <0%> (ø)`
packages/jest-config/src/normalize.js	`93.77% <100%> (ø)`	⬆️
packages/jest-cli/src/run_jest.js	`69.41% <63.63%> (-0.59%)`	⬇️
packages/jest-message-util/src/index.js	`80.76% <83.33%> (-0.34%)`	⬇️
... and 3 more

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SimenB · 2018-05-04T08:02:30Z

packages/jest-cli/package.json

@@ -4,8 +4,10 @@
  "version": "22.4.2",
  "main": "build/jest.js",
  "dependencies": {
+    "@babel/highlight": "^7.0.0-beta.46",


this is already in our tree as @babel/codeframe uses it

SimenB · 2018-05-04T08:02:46Z

packages/jest-cli/package.json

    "ansi-escapes": "^3.0.0",
    "chalk": "^2.0.1",
+    "easy-table": "^1.1.1",


seems small enough, happy to take suggestions about others

or other ideas on how to print the info

Stack trace with code frame maybe, but this is OK for now

Ooooh, faking a stack trace with this info, I like the idea! I'll give it a whack later today

SimenB · 2018-05-04T14:09:05Z

@thymikee using code frame:

It loses each line, but I think that's fine?

SimenB · 2018-05-04T15:32:05Z

I was having issues with the sourcemaps, so I ended up just inlining the whole module. That simplifies the code, as I don't have to care about the formatting from them. And we suddenly get function names etc.

Looks like this:

Note that this is only correct with sourcemaps, so we need to re-apply #5945, otherwise it'll point to the wrong stuff

cpojer · 2018-05-04T17:37:46Z

Ok, this is incredibly awesome. I really love this feature, thanks for working on it. Before we merge it, here are a two things to consider:

Can we turn this on by default? Right now, Jest wouldn't quit so this shouldn't make it worse and do nothing in the normal case. --forceExit can be used to skip the behavior.
Can we make this look as pretty as a normal assertion failure in Jest? That way people will actually pay attention and it will look as polished as everything else.

SimenB · 2018-05-04T17:46:48Z

Can we turn this on by default? Right now, Jest wouldn't quit so this shouldn't make it worse and do nothing in the normal case. --forceExit can be used to skip the behavior.

Unfortunately, the overhead of async_hooks is quite high - up to 30% perf hit for promise-heavy applications (see https://github.com/bmeurer/async-hooks-performance-impact). So I think it should be behind a flag at least until that is better.

Can we make this look as pretty as a normal assertion failure in Jest? That way people will actually pay attention and it will look as polished as everything else.

It's now a code frame, so kinda looks like assertion errors. Any way in particular you think it could look more like an assertion error?

cpojer · 2018-05-04T18:34:37Z

Oh, that's quite a shame. Any way we can upsell this feature if Jest keeps hanging, like re-run with --detectOpenHandlers? Otherwise people won't be able to find out about this awesome feature.

The red text followed by the TCPSERVERWRAP and the two newlines afterwards looks odd. Could we make it look like

* (bullet) Message

Additional context

codeframe
stack trace

with the same newlines and indentation as assertion errors?

SimenB · 2018-05-04T19:10:59Z

Any way we can upsell this feature if Jest keeps hanging, like re-run with --detectOpenHandlers? Otherwise people won't be able to find out about this awesome feature.

Pushed a 1000 ms timeout if tests still hasn't quit, looks like so:

If --forceExit is used, it looks like so:

The red text followed by the TCPSERVERWRAP and the two newlines afterwards looks odd.

It gets kinda wonky when you have multiple handles:

How do you think that should look like? I wonder if multiple bulletpoints etc might be confusing. Maybe not, though

cpojer · 2018-05-04T19:51:54Z

Love the iterations!

The 1s timeout, does that keep Jest alive for one more second or will it still exit fast if there are no handlers?
I think we can treat it like multiple test failures, so having multiple bullets per open handle seems fine with me.

SimenB · 2018-05-04T20:24:28Z

The 1s timeout, does that keep Jest alive for one more second or will it still exit fast if there are no handlers?

The .unref calls makes it not keep the process open. https://nodejs.org/api/timers.html#timers_timeout_unref

I think we can treat it like multiple test failures, so having multiple bullets per open handle seems fine with me.

Aight, I'll whip something together 🙂

SimenB · 2018-05-04T20:40:43Z

Like this?

cpojer · 2018-05-04T20:42:25Z

Hell yeah.

SimenB · 2018-05-04T20:43:44Z

Awesome. I'll try to add some tests - I suppose sending sigint in the integration test should work

rickhanlonii · 2018-05-04T21:08:12Z

Beauty!

This Pull Request updates dependency [jest](https://github.com/facebook/jest) from `~22.4.0` to `~23.0.0` <details> <summary>Release Notes</summary> ### [`v23.0.0`](https://github.com/facebook/jest/blob/master/CHANGELOG.md#2300) [Compare Source](jestjs/jest@2745e3e...614f739) ##### Features * `[expect]` Expose `getObjectSubset`, `iterableEquality`, and `subsetEquality` ([#6210](`https://github.com/facebook/jest/pull/6210`)) * `[jest-snapshot]` Add snapshot property matchers ([#6210](`https://github.com/facebook/jest/pull/6210`)) * `[jest-config]` Support jest-preset.js files within Node modules ([#6185](`https://github.com/facebook/jest/pull/6185`)) * `[jest-cli]` Add `--detectOpenHandles` flag which enables Jest to potentially track down handles keeping it open after tests are complete. ([#6130](`https://github.com/facebook/jest/pull/6130`)) * `[jest-jasmine2]` Add data driven testing based on `jest-each` ([#6102](`https://github.com/facebook/jest/pull/6102`)) * `[jest-matcher-utils]` Change "suggest to equal" message to be more advisory ([#6103](`https://github.com/facebook/jest/issues/6103`)) * `[jest-message-util]` Don't ignore messages with `vendor` anymore ([#6117](`https://github.com/facebook/jest/pull/6117`)) * `[jest-validate]` Get rid of `jest-config` dependency ([#6067](`https://github.com/facebook/jest/pull/6067`)) * `[jest-validate]` Adds option to inject `deprecationEntries` ([#6067](`https://github.com/facebook/jest/pull/6067`)) * `[jest-snapshot]` [**BREAKING**] Concatenate name of test, optional snapshot name and count ([#6015](`https://github.com/facebook/jest/pull/6015`)) * `[jest-runtime]` Allow for transform plugins to skip the definition process method if createTransformer method was defined. ([#5999](`https://github.com/facebook/jest/pull/5999`)) * `[expect]` Add stack trace for async errors ([#6008](`https://github.com/facebook/jest/pull/6008`)) * `[jest-jasmine2]` Add stack trace for timeouts ([#6008](`https://github.com/facebook/jest/pull/6008`)) * `[jest-jasmine2]` Add stack trace for thrown non-`Error`s ([#6008](`https://github.com/facebook/jest/pull/6008`)) * `[jest-runtime]` Prevent modules from marking themselves as their own parent ([#5235](`https://github.com/facebook/jest/issues/5235`)) * `[jest-mock]` Add support for auto-mocking generator functions ([#5983](`https://github.com/facebook/jest/pull/5983`)) * `[expect]` Add support for async matchers ([#5919](`https://github.com/facebook/jest/pull/5919`)) * `[expect]` Suggest toContainEqual ([#5948](`https://github.com/facebook/jest/pull/5953`)) * `[jest-config]` Export Jest's default options ([#5948](`https://github.com/facebook/jest/pull/5948`)) * `[jest-editor-support]` Move `coverage` to `ProjectWorkspace.collectCoverage` ([#5929](`https://github.com/facebook/jest/pull/5929`)) * `[jest-editor-support]` Add `coverage` option to runner ([#5836](`https://github.com/facebook/jest/pull/5836`)) * `[jest-haste-map]` Support extracting dynamic `import`s ([#5883](`https://github.com/facebook/jest/pull/5883`)) * `[expect]` Improve output format for mismatchedArgs in mock/spy calls. ([#5846](`https://github.com/facebook/jest/pull/5846`)) * `[jest-cli]` Add support for using `--coverage` in combination with watch mode, `--onlyChanged`, `--findRelatedTests` and more ([#5601](`https://github.com/facebook/jest/pull/5601`)) * `[jest-jasmine2]` [**BREAKING**] Adds error throwing and descriptive errors to `it`/ `test` for invalid arguments. `[jest-circus]` Adds error throwing and descriptive errors to `it`/ `test` for invalid arguments ([#5558](`https://github.com/facebook/jest/pull/5558`)) * `[jest-matcher-utils]` Add `isNot` option to `matcherHint` function ([#5512](`https://github.com/facebook/jest/pull/5512`)) * `[jest-config]` Add `<rootDir>` to runtime files not found error report ([#5693](`https://github.com/facebook/jest/pull/5693`)) * `[expect]` Make toThrow matcher pass only if Error object is returned from promises ([#5670](`https://github.com/facebook/jest/pull/5670`)) * `[expect]` Add isError to utils ([#5670](`https://github.com/facebook/jest/pull/5670`)) * `[expect]` Add inverse matchers (`expect.not.arrayContaining`, etc., [#5517](`https://github.com/facebook/jest/pull/5517`)) * `[expect]` `expect.extend` now also extends asymmetric matchers ([#5503](`https://github.com/facebook/jest/pull/5503`)) * `[jest-mock]` Update `spyOnProperty` to support spying on the prototype chain ([#5753](`https://github.com/facebook/jest/pull/5753`)) * `[jest-mock]` Add tracking of return values in the `mock` property ([#5752](`https://github.com/facebook/jest/pull/5752`)) * `[jest-mock]` Add tracking of thrown errors in the `mock` property ([#5764](`https://github.com/facebook/jest/pull/5764`)) * `[expect]`Add nthCalledWith spy matcher ([#5605](`https://github.com/facebook/jest/pull/5605`)) * `[jest-cli]` Add `isSerial` property that runners can expose to specify that they can not run in parallel ([#5706](`https://github.com/facebook/jest/pull/5706`)) * `[expect]` Add `.toBeCalledTimes` and `toHaveBeenNthCalledWith` aliases ([#5826](`https://github.com/facebook/jest/pull/5826`)) * `[jest-cli]` Interactive Snapshot Mode improvements ([#5864](`https://github.com/facebook/jest/pull/5864`)) * `[jest-editor-support]` Add `no-color` option to runner ([#5909](`https://github.com/facebook/jest/pull/5909`)) * `[jest-jasmine2]` Pretty-print non-Error object errors ([#5980](`https://github.com/facebook/jest/pull/5980`)) * `[jest-message-util]` Include column in stack frames ([#5889](`https://github.com/facebook/jest/pull/5889`)) * `[expect]` Introduce toStrictEqual ([#6032](`https://github.com/facebook/jest/pull/6032`)) * `[expect]` Add return matchers ([#5879](`https://github.com/facebook/jest/pull/5879`)) * `[jest-cli]` Improve snapshot summaries ([#6181](`https://github.com/facebook/jest/pull/6181`)) * `[expect]` Include custom mock names in error messages ([#6199](`https://github.com/facebook/jest/pull/6199`)) * `[jest-diff]` Support returning diff from oneline strings ([#6221](`https://github.com/facebook/jest/pull/6221`)) * `[expect]` Improve return matchers ([#6172](`https://github.com/facebook/jest/pull/6172`)) * `[jest-cli]` Overhaul watch plugin hooks names ([#6249](`https://github.com/facebook/jest/pull/6249`)) * `[jest-mock]` Include tracked call results in serialized mock ([#6244](`https://github.com/facebook/jest/pull/6244`)) ##### Fixes * `[jest-cli]` Fix stdin encoding to utf8 for watch plugins. ([#6253](`https://github.com/facebook/jest/issues/6253`)) * `[expect]` Better detection of DOM Nodes for equality ([#6246](`https://github.com/facebook/jest/pull/6246`)) * `[jest-cli]` Fix misleading action description for F key when in "only failed tests" mode. ([#6167](`https://github.com/facebook/jest/issues/6167`)) * `[jest-worker]` Stick calls to workers before processing them ([#6073](`https://github.com/facebook/jest/pull/6073`)) * `[babel-plugin-jest-hoist]` Allow using `console` global variable ([#6075](`https://github.com/facebook/jest/pull/6075`)) * `[jest-jasmine2]` Always remove node core message from assert stack traces ([#6055](`https://github.com/facebook/jest/pull/6055`)) * `[expect]` Add stack trace when `expect.assertions` and `expect.hasAssertions` causes test failures. ([#5997](`https://github.com/facebook/jest/pull/5997`)) * `[jest-runtime]` Throw a more useful error when trying to require modules after the test environment is torn down ([#5888](`https://github.com/facebook/jest/pull/5888`)) * `[jest-mock]` [**BREAKING**] Replace timestamps with `invocationCallOrder` ([#5867](`https://github.com/facebook/jest/pull/5867`)) * `[jest-jasmine2]` Install `sourcemap-support` into normal runtime to catch runtime errors ([#5945](`https://github.com/facebook/jest/pull/5945`)) * `[jest-jasmine2]` Added assertion error handling inside `afterAll hook` ([#5884](`https://github.com/facebook/jest/pull/5884`)) * `[jest-cli]` Remove the notifier actions in case of failure when not in watch mode. ([#5861](`https://github.com/facebook/jest/pull/5861`)) * `[jest-mock]` Extend .toHaveBeenCalled return message with outcome ([#5951](`https://github.com/facebook/jest/pull/5951`)) * `[jest-runner]` Assign `process.env.JEST_WORKER_ID="1"` when in runInBand mode ([#5860](`https://github.com/facebook/jest/pull/5860`)) * `[jest-cli]` Add descriptive error message when trying to use `globalSetup`/`globalTeardown` file that doesn't export a function. ([#5835](`https://github.com/facebook/jest/pull/5835`)) * `[expect]` Do not rely on `instanceof RegExp`, since it will not work for RegExps created inside of a different VM ([#5729](`https://github.com/facebook/jest/pull/5729`)) * `[jest-resolve]` Update node module resolution algorithm to correctly handle symlinked paths ([#5085](`https://github.com/facebook/jest/pull/5085`)) * `[jest-editor-support]` Update `Settings` to use spawn in shell option ([#5658](`https://github.com/facebook/jest/pull/5658`)) * `[jest-cli]` Improve the error message when 2 projects resolve to the same config ([#5674](`https://github.com/facebook/jest/pull/5674`)) * `[jest-runtime]` remove retainLines from coverage instrumentation ([#5692](`https://github.com/facebook/jest/pull/5692`)) * `[jest-cli]` Fix update snapshot issue when using watchAll ([#5696](`https://github.com/facebook/jest/pull/5696`)) * `[expect]` Fix rejects.not matcher ([#5670](`https://github.com/facebook/jest/pull/5670`)) * `[jest-runtime]` Prevent Babel warnings on large files ([#5702](`https://github.com/facebook/jest/pull/5702`)) * `[jest-mock]` Prevent `mockRejectedValue` from causing unhandled rejection ([#5720](`https://github.com/facebook/jest/pull/5720`)) * `[pretty-format]` Handle React fragments better ([#5816](`https://github.com/facebook/jest/pull/5816`)) * `[pretty-format]` Handle formatting of `React.forwardRef` and `Context` components ([#6093](`https://github.com/facebook/jest/pull/6093`)) * `[jest-cli]` Switch collectCoverageFrom back to a string ([#5914](`https://github.com/facebook/jest/pull/5914`)) * `[jest-regex-util]` Fix handling regex symbols in tests path on Windows ([#5941](`https://github.com/facebook/jest/pull/5941`)) * `[jest-util]` Fix handling of NaN/Infinity in mock timer delay ([#5966](`https://github.com/facebook/jest/pull/5966`)) * `[jest-resolve]` Generalise test for package main entries equivalent to ".". ([#5968](`https://github.com/facebook/jest/pull/5968`)) * `[jest-config]` Ensure that custom resolvers are used when resolving the configuration ([#5976](`https://github.com/facebook/jest/pull/5976`)) * `[website]` Fix website docs ([#5853](`https://github.com/facebook/jest/pull/5853`)) * `[expect]` Fix isEqual Set and Map to compare object values and keys regardless of order ([#6150](`https://github.com/facebook/jest/pull/6150`)) * `[pretty-format]` [**BREAKING**] Remove undefined props from React elements ([#6162](`https://github.com/facebook/jest/pull/6162`)) * `[jest-haste-map]` Properly resolve mocked node modules without package.json defined ([#6232](`https://github.com/facebook/jest/pull/6232`)) ##### Chore & Maintenance * `[jest-runner]` Move sourcemap installation from `jest-jasmine2` to `jest-runner` ([#6176](`https://github.com/facebook/jest/pull/6176`)) * `[jest-cli]` Use yargs's built-in `version` instead of rolling our own ([#6215](`https://github.com/facebook/jest/pull/6215`)) * `[docs]` Add explanation on how to mock methods not implemented in JSDOM * `[jest-jasmine2]` Simplify `Env.execute` and TreeProcessor to setup and clean resources for the top suite the same way as for all of the children suites ([#5885](`https://github.com/facebook/jest/pull/5885`)) * `[babel-jest]` [**BREAKING**] Always return object from transformer ([#5991](`https://github.com/facebook/jest/pull/5991`)) * `[*]` Run Prettier on compiled output ([#5858](`https://github.com/facebook/jest/pull/3497`)) * `[jest-cli]` Add fileChange hook for plugins ([#5708](`https://github.com/facebook/jest/pull/5708`)) * `[docs]` Add docs on using `jest.mock(...)` ([#5648](`https://github.com/facebook/jest/pull/5648`)) * `[docs]` Mention Jest Puppeteer Preset ([#5722](`https://github.com/facebook/jest/pull/5722`)) * `[docs]` Add jest-community section to website ([#5675](`https://github.com/facebook/jest/pull/5675`)) * `[docs]` Add versioned docs for v22.4 ([##5733](https://github.com/facebook/jest/pull/#5733)) * `[docs]` Improve Snapshot Testing Guide ([#5812](`https://github.com/facebook/jest/issues/5812`)) * `[jest-runtime]` [**BREAKING**] Remove `jest.genMockFn` and `jest.genMockFunction` ([#6173](`https://github.com/facebook/jest/pull/6173`)) * `[jest-message-util]` Avoid adding unnecessary indent to blank lines in stack traces ([#6211](`https://github.com/facebook/jest/pull/6211`)) --- </details> --- This PR has been generated by [Renovate Bot](https://renovatebot.com).

This Pull Request updates dependency [jest](https://github.com/facebook/jest) from `~22.4.0` to `~23.0.0` <details> <summary>Release Notes</summary> ### [`v23.0.0`](https://github.com/facebook/jest/blob/master/CHANGELOG.md#2300) [Compare Source](jestjs/jest@2745e3e...v23.0.0) ##### Features * `[expect]` Expose `getObjectSubset`, `iterableEquality`, and `subsetEquality` ([#6210](`https://github.com/facebook/jest/pull/6210`)) * `[jest-snapshot]` Add snapshot property matchers ([#6210](`https://github.com/facebook/jest/pull/6210`)) * `[jest-config]` Support jest-preset.js files within Node modules ([#6185](`https://github.com/facebook/jest/pull/6185`)) * `[jest-cli]` Add `--detectOpenHandles` flag which enables Jest to potentially track down handles keeping it open after tests are complete. ([#6130](`https://github.com/facebook/jest/pull/6130`)) * `[jest-jasmine2]` Add data driven testing based on `jest-each` ([#6102](`https://github.com/facebook/jest/pull/6102`)) * `[jest-matcher-utils]` Change "suggest to equal" message to be more advisory ([#6103](`https://github.com/facebook/jest/issues/6103`)) * `[jest-message-util]` Don't ignore messages with `vendor` anymore ([#6117](`https://github.com/facebook/jest/pull/6117`)) * `[jest-validate]` Get rid of `jest-config` dependency ([#6067](`https://github.com/facebook/jest/pull/6067`)) * `[jest-validate]` Adds option to inject `deprecationEntries` ([#6067](`https://github.com/facebook/jest/pull/6067`)) * `[jest-snapshot]` [**BREAKING**] Concatenate name of test, optional snapshot name and count ([#6015](`https://github.com/facebook/jest/pull/6015`)) * `[jest-runtime]` Allow for transform plugins to skip the definition process method if createTransformer method was defined. ([#5999](`https://github.com/facebook/jest/pull/5999`)) * `[expect]` Add stack trace for async errors ([#6008](`https://github.com/facebook/jest/pull/6008`)) * `[jest-jasmine2]` Add stack trace for timeouts ([#6008](`https://github.com/facebook/jest/pull/6008`)) * `[jest-jasmine2]` Add stack trace for thrown non-`Error`s ([#6008](`https://github.com/facebook/jest/pull/6008`)) * `[jest-runtime]` Prevent modules from marking themselves as their own parent ([#5235](`https://github.com/facebook/jest/issues/5235`)) * `[jest-mock]` Add support for auto-mocking generator functions ([#5983](`https://github.com/facebook/jest/pull/5983`)) * `[expect]` Add support for async matchers ([#5919](`https://github.com/facebook/jest/pull/5919`)) * `[expect]` Suggest toContainEqual ([#5948](`https://github.com/facebook/jest/pull/5953`)) * `[jest-config]` Export Jest's default options ([#5948](`https://github.com/facebook/jest/pull/5948`)) * `[jest-editor-support]` Move `coverage` to `ProjectWorkspace.collectCoverage` ([#5929](`https://github.com/facebook/jest/pull/5929`)) * `[jest-editor-support]` Add `coverage` option to runner ([#5836](`https://github.com/facebook/jest/pull/5836`)) * `[jest-haste-map]` Support extracting dynamic `import`s ([#5883](`https://github.com/facebook/jest/pull/5883`)) * `[expect]` Improve output format for mismatchedArgs in mock/spy calls. ([#5846](`https://github.com/facebook/jest/pull/5846`)) * `[jest-cli]` Add support for using `--coverage` in combination with watch mode, `--onlyChanged`, `--findRelatedTests` and more ([#5601](`https://github.com/facebook/jest/pull/5601`)) * `[jest-jasmine2]` [**BREAKING**] Adds error throwing and descriptive errors to `it`/ `test` for invalid arguments. `[jest-circus]` Adds error throwing and descriptive errors to `it`/ `test` for invalid arguments ([#5558](`https://github.com/facebook/jest/pull/5558`)) * `[jest-matcher-utils]` Add `isNot` option to `matcherHint` function ([#5512](`https://github.com/facebook/jest/pull/5512`)) * `[jest-config]` Add `<rootDir>` to runtime files not found error report ([#5693](`https://github.com/facebook/jest/pull/5693`)) * `[expect]` Make toThrow matcher pass only if Error object is returned from promises ([#5670](`https://github.com/facebook/jest/pull/5670`)) * `[expect]` Add isError to utils ([#5670](`https://github.com/facebook/jest/pull/5670`)) * `[expect]` Add inverse matchers (`expect.not.arrayContaining`, etc., [#5517](`https://github.com/facebook/jest/pull/5517`)) * `[expect]` `expect.extend` now also extends asymmetric matchers ([#5503](`https://github.com/facebook/jest/pull/5503`)) * `[jest-mock]` Update `spyOnProperty` to support spying on the prototype chain ([#5753](`https://github.com/facebook/jest/pull/5753`)) * `[jest-mock]` Add tracking of return values in the `mock` property ([#5752](`https://github.com/facebook/jest/pull/5752`)) * `[jest-mock]` Add tracking of thrown errors in the `mock` property ([#5764](`https://github.com/facebook/jest/pull/5764`)) * `[expect]`Add nthCalledWith spy matcher ([#5605](`https://github.com/facebook/jest/pull/5605`)) * `[jest-cli]` Add `isSerial` property that runners can expose to specify that they can not run in parallel ([#5706](`https://github.com/facebook/jest/pull/5706`)) * `[expect]` Add `.toBeCalledTimes` and `toHaveBeenNthCalledWith` aliases ([#5826](`https://github.com/facebook/jest/pull/5826`)) * `[jest-cli]` Interactive Snapshot Mode improvements ([#5864](`https://github.com/facebook/jest/pull/5864`)) * `[jest-editor-support]` Add `no-color` option to runner ([#5909](`https://github.com/facebook/jest/pull/5909`)) * `[jest-jasmine2]` Pretty-print non-Error object errors ([#5980](`https://github.com/facebook/jest/pull/5980`)) * `[jest-message-util]` Include column in stack frames ([#5889](`https://github.com/facebook/jest/pull/5889`)) * `[expect]` Introduce toStrictEqual ([#6032](`https://github.com/facebook/jest/pull/6032`)) * `[expect]` Add return matchers ([#5879](`https://github.com/facebook/jest/pull/5879`)) * `[jest-cli]` Improve snapshot summaries ([#6181](`https://github.com/facebook/jest/pull/6181`)) * `[expect]` Include custom mock names in error messages ([#6199](`https://github.com/facebook/jest/pull/6199`)) * `[jest-diff]` Support returning diff from oneline strings ([#6221](`https://github.com/facebook/jest/pull/6221`)) * `[expect]` Improve return matchers ([#6172](`https://github.com/facebook/jest/pull/6172`)) * `[jest-cli]` Overhaul watch plugin hooks names ([#6249](`https://github.com/facebook/jest/pull/6249`)) * `[jest-mock]` Include tracked call results in serialized mock ([#6244](`https://github.com/facebook/jest/pull/6244`)) ##### Fixes * `[jest-cli]` Fix stdin encoding to utf8 for watch plugins. ([#6253](`https://github.com/facebook/jest/issues/6253`)) * `[expect]` Better detection of DOM Nodes for equality ([#6246](`https://github.com/facebook/jest/pull/6246`)) * `[jest-cli]` Fix misleading action description for F key when in "only failed tests" mode. ([#6167](`https://github.com/facebook/jest/issues/6167`)) * `[jest-worker]` Stick calls to workers before processing them ([#6073](`https://github.com/facebook/jest/pull/6073`)) * `[babel-plugin-jest-hoist]` Allow using `console` global variable ([#6075](`https://github.com/facebook/jest/pull/6075`)) * `[jest-jasmine2]` Always remove node core message from assert stack traces ([#6055](`https://github.com/facebook/jest/pull/6055`)) * `[expect]` Add stack trace when `expect.assertions` and `expect.hasAssertions` causes test failures. ([#5997](`https://github.com/facebook/jest/pull/5997`)) * `[jest-runtime]` Throw a more useful error when trying to require modules after the test environment is torn down ([#5888](`https://github.com/facebook/jest/pull/5888`)) * `[jest-mock]` [**BREAKING**] Replace timestamps with `invocationCallOrder` ([#5867](`https://github.com/facebook/jest/pull/5867`)) * `[jest-jasmine2]` Install `sourcemap-support` into normal runtime to catch runtime errors ([#5945](`https://github.com/facebook/jest/pull/5945`)) * `[jest-jasmine2]` Added assertion error handling inside `afterAll hook` ([#5884](`https://github.com/facebook/jest/pull/5884`)) * `[jest-cli]` Remove the notifier actions in case of failure when not in watch mode. ([#5861](`https://github.com/facebook/jest/pull/5861`)) * `[jest-mock]` Extend .toHaveBeenCalled return message with outcome ([#5951](`https://github.com/facebook/jest/pull/5951`)) * `[jest-runner]` Assign `process.env.JEST_WORKER_ID="1"` when in runInBand mode ([#5860](`https://github.com/facebook/jest/pull/5860`)) * `[jest-cli]` Add descriptive error message when trying to use `globalSetup`/`globalTeardown` file that doesn't export a function. ([#5835](`https://github.com/facebook/jest/pull/5835`)) * `[expect]` Do not rely on `instanceof RegExp`, since it will not work for RegExps created inside of a different VM ([#5729](`https://github.com/facebook/jest/pull/5729`)) * `[jest-resolve]` Update node module resolution algorithm to correctly handle symlinked paths ([#5085](`https://github.com/facebook/jest/pull/5085`)) * `[jest-editor-support]` Update `Settings` to use spawn in shell option ([#5658](`https://github.com/facebook/jest/pull/5658`)) * `[jest-cli]` Improve the error message when 2 projects resolve to the same config ([#5674](`https://github.com/facebook/jest/pull/5674`)) * `[jest-runtime]` remove retainLines from coverage instrumentation ([#5692](`https://github.com/facebook/jest/pull/5692`)) * `[jest-cli]` Fix update snapshot issue when using watchAll ([#5696](`https://github.com/facebook/jest/pull/5696`)) * `[expect]` Fix rejects.not matcher ([#5670](`https://github.com/facebook/jest/pull/5670`)) * `[jest-runtime]` Prevent Babel warnings on large files ([#5702](`https://github.com/facebook/jest/pull/5702`)) * `[jest-mock]` Prevent `mockRejectedValue` from causing unhandled rejection ([#5720](`https://github.com/facebook/jest/pull/5720`)) * `[pretty-format]` Handle React fragments better ([#5816](`https://github.com/facebook/jest/pull/5816`)) * `[pretty-format]` Handle formatting of `React.forwardRef` and `Context` components ([#6093](`https://github.com/facebook/jest/pull/6093`)) * `[jest-cli]` Switch collectCoverageFrom back to a string ([#5914](`https://github.com/facebook/jest/pull/5914`)) * `[jest-regex-util]` Fix handling regex symbols in tests path on Windows ([#5941](`https://github.com/facebook/jest/pull/5941`)) * `[jest-util]` Fix handling of NaN/Infinity in mock timer delay ([#5966](`https://github.com/facebook/jest/pull/5966`)) * `[jest-resolve]` Generalise test for package main entries equivalent to ".". ([#5968](`https://github.com/facebook/jest/pull/5968`)) * `[jest-config]` Ensure that custom resolvers are used when resolving the configuration ([#5976](`https://github.com/facebook/jest/pull/5976`)) * `[website]` Fix website docs ([#5853](`https://github.com/facebook/jest/pull/5853`)) * `[expect]` Fix isEqual Set and Map to compare object values and keys regardless of order ([#6150](`https://github.com/facebook/jest/pull/6150`)) * `[pretty-format]` [**BREAKING**] Remove undefined props from React elements ([#6162](`https://github.com/facebook/jest/pull/6162`)) * `[jest-haste-map]` Properly resolve mocked node modules without package.json defined ([#6232](`https://github.com/facebook/jest/pull/6232`)) ##### Chore & Maintenance * `[jest-runner]` Move sourcemap installation from `jest-jasmine2` to `jest-runner` ([#6176](`https://github.com/facebook/jest/pull/6176`)) * `[jest-cli]` Use yargs's built-in `version` instead of rolling our own ([#6215](`https://github.com/facebook/jest/pull/6215`)) * `[docs]` Add explanation on how to mock methods not implemented in JSDOM * `[jest-jasmine2]` Simplify `Env.execute` and TreeProcessor to setup and clean resources for the top suite the same way as for all of the children suites ([#5885](`https://github.com/facebook/jest/pull/5885`)) * `[babel-jest]` [**BREAKING**] Always return object from transformer ([#5991](`https://github.com/facebook/jest/pull/5991`)) * `[*]` Run Prettier on compiled output ([#5858](`https://github.com/facebook/jest/pull/3497`)) * `[jest-cli]` Add fileChange hook for plugins ([#5708](`https://github.com/facebook/jest/pull/5708`)) * `[docs]` Add docs on using `jest.mock(...)` ([#5648](`https://github.com/facebook/jest/pull/5648`)) * `[docs]` Mention Jest Puppeteer Preset ([#5722](`https://github.com/facebook/jest/pull/5722`)) * `[docs]` Add jest-community section to website ([#5675](`https://github.com/facebook/jest/pull/5675`)) * `[docs]` Add versioned docs for v22.4 ([##5733](https://github.com/facebook/jest/pull/#5733)) * `[docs]` Improve Snapshot Testing Guide ([#5812](`https://github.com/facebook/jest/issues/5812`)) * `[jest-runtime]` [**BREAKING**] Remove `jest.genMockFn` and `jest.genMockFunction` ([#6173](`https://github.com/facebook/jest/pull/6173`)) * `[jest-message-util]` Avoid adding unnecessary indent to blank lines in stack traces ([#6211](`https://github.com/facebook/jest/pull/6211`)) --- </details> --- This PR has been generated by [Renovate Bot](https://renovatebot.com).

This Pull Request updates dependency [jest](https://github.com/facebook/jest) from `v22.4.3` to `v23.0.1` <details> <summary>Release Notes</summary> ### [`v23.0.1`](https://github.com/facebook/jest/blob/master/CHANGELOG.md#2301) [Compare Source](jestjs/jest@v23.0.0...3a3b4e3) ##### Chore & Maintenance * `[jest-jasemine2]` Add dependency on jest-each ([#6308](`https://github.com/facebook/jest/pull/6308`)) * `[jest-each]` Move jest-each into core Jest ([#6278](`https://github.com/facebook/jest/pull/6278`)) * `[examples]` Update typescript example to using ts-jest ([#6260](`https://github.com/facebook/jest/pull/6260`)) ##### Fixes * `[pretty-format]` Serialize inverse asymmetric matchers correctly ([#6272](`https://github.com/facebook/jest/pull/6272`)) --- ### [`v23.0.0`](https://github.com/facebook/jest/blob/master/CHANGELOG.md#2300) [Compare Source](jestjs/jest@2745e3e...v23.0.0) ##### Features * `[expect]` Expose `getObjectSubset`, `iterableEquality`, and `subsetEquality` ([#6210](`https://github.com/facebook/jest/pull/6210`)) * `[jest-snapshot]` Add snapshot property matchers ([#6210](`https://github.com/facebook/jest/pull/6210`)) * `[jest-config]` Support jest-preset.js files within Node modules ([#6185](`https://github.com/facebook/jest/pull/6185`)) * `[jest-cli]` Add `--detectOpenHandles` flag which enables Jest to potentially track down handles keeping it open after tests are complete. ([#6130](`https://github.com/facebook/jest/pull/6130`)) * `[jest-jasmine2]` Add data driven testing based on `jest-each` ([#6102](`https://github.com/facebook/jest/pull/6102`)) * `[jest-matcher-utils]` Change "suggest to equal" message to be more advisory ([#6103](`https://github.com/facebook/jest/issues/6103`)) * `[jest-message-util]` Don't ignore messages with `vendor` anymore ([#6117](`https://github.com/facebook/jest/pull/6117`)) * `[jest-validate]` Get rid of `jest-config` dependency ([#6067](`https://github.com/facebook/jest/pull/6067`)) * `[jest-validate]` Adds option to inject `deprecationEntries` ([#6067](`https://github.com/facebook/jest/pull/6067`)) * `[jest-snapshot]` [**BREAKING**] Concatenate name of test, optional snapshot name and count ([#6015](`https://github.com/facebook/jest/pull/6015`)) * `[jest-runtime]` Allow for transform plugins to skip the definition process method if createTransformer method was defined. ([#5999](`https://github.com/facebook/jest/pull/5999`)) * `[expect]` Add stack trace for async errors ([#6008](`https://github.com/facebook/jest/pull/6008`)) * `[jest-jasmine2]` Add stack trace for timeouts ([#6008](`https://github.com/facebook/jest/pull/6008`)) * `[jest-jasmine2]` Add stack trace for thrown non-`Error`s ([#6008](`https://github.com/facebook/jest/pull/6008`)) * `[jest-runtime]` Prevent modules from marking themselves as their own parent ([#5235](`https://github.com/facebook/jest/issues/5235`)) * `[jest-mock]` Add support for auto-mocking generator functions ([#5983](`https://github.com/facebook/jest/pull/5983`)) * `[expect]` Add support for async matchers ([#5919](`https://github.com/facebook/jest/pull/5919`)) * `[expect]` Suggest toContainEqual ([#5948](`https://github.com/facebook/jest/pull/5953`)) * `[jest-config]` Export Jest's default options ([#5948](`https://github.com/facebook/jest/pull/5948`)) * `[jest-editor-support]` Move `coverage` to `ProjectWorkspace.collectCoverage` ([#5929](`https://github.com/facebook/jest/pull/5929`)) * `[jest-editor-support]` Add `coverage` option to runner ([#5836](`https://github.com/facebook/jest/pull/5836`)) * `[jest-haste-map]` Support extracting dynamic `import`s ([#5883](`https://github.com/facebook/jest/pull/5883`)) * `[expect]` Improve output format for mismatchedArgs in mock/spy calls. ([#5846](`https://github.com/facebook/jest/pull/5846`)) * `[jest-cli]` Add support for using `--coverage` in combination with watch mode, `--onlyChanged`, `--findRelatedTests` and more ([#5601](`https://github.com/facebook/jest/pull/5601`)) * `[jest-jasmine2]` [**BREAKING**] Adds error throwing and descriptive errors to `it`/ `test` for invalid arguments. `[jest-circus]` Adds error throwing and descriptive errors to `it`/ `test` for invalid arguments ([#5558](`https://github.com/facebook/jest/pull/5558`)) * `[jest-matcher-utils]` Add `isNot` option to `matcherHint` function ([#5512](`https://github.com/facebook/jest/pull/5512`)) * `[jest-config]` Add `<rootDir>` to runtime files not found error report ([#5693](`https://github.com/facebook/jest/pull/5693`)) * `[expect]` Make toThrow matcher pass only if Error object is returned from promises ([#5670](`https://github.com/facebook/jest/pull/5670`)) * `[expect]` Add isError to utils ([#5670](`https://github.com/facebook/jest/pull/5670`)) * `[expect]` Add inverse matchers (`expect.not.arrayContaining`, etc., [#5517](`https://github.com/facebook/jest/pull/5517`)) * `[expect]` `expect.extend` now also extends asymmetric matchers ([#5503](`https://github.com/facebook/jest/pull/5503`)) * `[jest-mock]` Update `spyOnProperty` to support spying on the prototype chain ([#5753](`https://github.com/facebook/jest/pull/5753`)) * `[jest-mock]` Add tracking of return values in the `mock` property ([#5752](`https://github.com/facebook/jest/pull/5752`)) * `[jest-mock]` Add tracking of thrown errors in the `mock` property ([#5764](`https://github.com/facebook/jest/pull/5764`)) * `[expect]`Add nthCalledWith spy matcher ([#5605](`https://github.com/facebook/jest/pull/5605`)) * `[jest-cli]` Add `isSerial` property that runners can expose to specify that they can not run in parallel ([#5706](`https://github.com/facebook/jest/pull/5706`)) * `[expect]` Add `.toBeCalledTimes` and `toHaveBeenNthCalledWith` aliases ([#5826](`https://github.com/facebook/jest/pull/5826`)) * `[jest-cli]` Interactive Snapshot Mode improvements ([#5864](`https://github.com/facebook/jest/pull/5864`)) * `[jest-editor-support]` Add `no-color` option to runner ([#5909](`https://github.com/facebook/jest/pull/5909`)) * `[jest-jasmine2]` Pretty-print non-Error object errors ([#5980](`https://github.com/facebook/jest/pull/5980`)) * `[jest-message-util]` Include column in stack frames ([#5889](`https://github.com/facebook/jest/pull/5889`)) * `[expect]` Introduce toStrictEqual ([#6032](`https://github.com/facebook/jest/pull/6032`)) * `[expect]` Add return matchers ([#5879](`https://github.com/facebook/jest/pull/5879`)) * `[jest-cli]` Improve snapshot summaries ([#6181](`https://github.com/facebook/jest/pull/6181`)) * `[expect]` Include custom mock names in error messages ([#6199](`https://github.com/facebook/jest/pull/6199`)) * `[jest-diff]` Support returning diff from oneline strings ([#6221](`https://github.com/facebook/jest/pull/6221`)) * `[expect]` Improve return matchers ([#6172](`https://github.com/facebook/jest/pull/6172`)) * `[jest-cli]` Overhaul watch plugin hooks names ([#6249](`https://github.com/facebook/jest/pull/6249`)) * `[jest-mock]` Include tracked call results in serialized mock ([#6244](`https://github.com/facebook/jest/pull/6244`)) ##### Fixes * `[jest-cli]` Fix stdin encoding to utf8 for watch plugins. ([#6253](`https://github.com/facebook/jest/issues/6253`)) * `[expect]` Better detection of DOM Nodes for equality ([#6246](`https://github.com/facebook/jest/pull/6246`)) * `[jest-cli]` Fix misleading action description for F key when in "only failed tests" mode. ([#6167](`https://github.com/facebook/jest/issues/6167`)) * `[jest-worker]` Stick calls to workers before processing them ([#6073](`https://github.com/facebook/jest/pull/6073`)) * `[babel-plugin-jest-hoist]` Allow using `console` global variable ([#6075](`https://github.com/facebook/jest/pull/6075`)) * `[jest-jasmine2]` Always remove node core message from assert stack traces ([#6055](`https://github.com/facebook/jest/pull/6055`)) * `[expect]` Add stack trace when `expect.assertions` and `expect.hasAssertions` causes test failures. ([#5997](`https://github.com/facebook/jest/pull/5997`)) * `[jest-runtime]` Throw a more useful error when trying to require modules after the test environment is torn down ([#5888](`https://github.com/facebook/jest/pull/5888`)) * `[jest-mock]` [**BREAKING**] Replace timestamps with `invocationCallOrder` ([#5867](`https://github.com/facebook/jest/pull/5867`)) * `[jest-jasmine2]` Install `sourcemap-support` into normal runtime to catch runtime errors ([#5945](`https://github.com/facebook/jest/pull/5945`)) * `[jest-jasmine2]` Added assertion error handling inside `afterAll hook` ([#5884](`https://github.com/facebook/jest/pull/5884`)) * `[jest-cli]` Remove the notifier actions in case of failure when not in watch mode. ([#5861](`https://github.com/facebook/jest/pull/5861`)) * `[jest-mock]` Extend .toHaveBeenCalled return message with outcome ([#5951](`https://github.com/facebook/jest/pull/5951`)) * `[jest-runner]` Assign `process.env.JEST_WORKER_ID="1"` when in runInBand mode ([#5860](`https://github.com/facebook/jest/pull/5860`)) * `[jest-cli]` Add descriptive error message when trying to use `globalSetup`/`globalTeardown` file that doesn't export a function. ([#5835](`https://github.com/facebook/jest/pull/5835`)) * `[expect]` Do not rely on `instanceof RegExp`, since it will not work for RegExps created inside of a different VM ([#5729](`https://github.com/facebook/jest/pull/5729`)) * `[jest-resolve]` Update node module resolution algorithm to correctly handle symlinked paths ([#5085](`https://github.com/facebook/jest/pull/5085`)) * `[jest-editor-support]` Update `Settings` to use spawn in shell option ([#5658](`https://github.com/facebook/jest/pull/5658`)) * `[jest-cli]` Improve the error message when 2 projects resolve to the same config ([#5674](`https://github.com/facebook/jest/pull/5674`)) * `[jest-runtime]` remove retainLines from coverage instrumentation ([#5692](`https://github.com/facebook/jest/pull/5692`)) * `[jest-cli]` Fix update snapshot issue when using watchAll ([#5696](`https://github.com/facebook/jest/pull/5696`)) * `[expect]` Fix rejects.not matcher ([#5670](`https://github.com/facebook/jest/pull/5670`)) * `[jest-runtime]` Prevent Babel warnings on large files ([#5702](`https://github.com/facebook/jest/pull/5702`)) * `[jest-mock]` Prevent `mockRejectedValue` from causing unhandled rejection ([#5720](`https://github.com/facebook/jest/pull/5720`)) * `[pretty-format]` Handle React fragments better ([#5816](`https://github.com/facebook/jest/pull/5816`)) * `[pretty-format]` Handle formatting of `React.forwardRef` and `Context` components ([#6093](`https://github.com/facebook/jest/pull/6093`)) * `[jest-cli]` Switch collectCoverageFrom back to a string ([#5914](`https://github.com/facebook/jest/pull/5914`)) * `[jest-regex-util]` Fix handling regex symbols in tests path on Windows ([#5941](`https://github.com/facebook/jest/pull/5941`)) * `[jest-util]` Fix handling of NaN/Infinity in mock timer delay ([#5966](`https://github.com/facebook/jest/pull/5966`)) * `[jest-resolve]` Generalise test for package main entries equivalent to ".". ([#5968](`https://github.com/facebook/jest/pull/5968`)) * `[jest-config]` Ensure that custom resolvers are used when resolving the configuration ([#5976](`https://github.com/facebook/jest/pull/5976`)) * `[website]` Fix website docs ([#5853](`https://github.com/facebook/jest/pull/5853`)) * `[expect]` Fix isEqual Set and Map to compare object values and keys regardless of order ([#6150](`https://github.com/facebook/jest/pull/6150`)) * `[pretty-format]` [**BREAKING**] Remove undefined props from React elements ([#6162](`https://github.com/facebook/jest/pull/6162`)) * `[jest-haste-map]` Properly resolve mocked node modules without package.json defined ([#6232](`https://github.com/facebook/jest/pull/6232`)) ##### Chore & Maintenance * `[jest-runner]` Move sourcemap installation from `jest-jasmine2` to `jest-runner` ([#6176](`https://github.com/facebook/jest/pull/6176`)) * `[jest-cli]` Use yargs's built-in `version` instead of rolling our own ([#6215](`https://github.com/facebook/jest/pull/6215`)) * `[docs]` Add explanation on how to mock methods not implemented in JSDOM * `[jest-jasmine2]` Simplify `Env.execute` and TreeProcessor to setup and clean resources for the top suite the same way as for all of the children suites ([#5885](`https://github.com/facebook/jest/pull/5885`)) * `[babel-jest]` [**BREAKING**] Always return object from transformer ([#5991](`https://github.com/facebook/jest/pull/5991`)) * `[*]` Run Prettier on compiled output ([#5858](`https://github.com/facebook/jest/pull/3497`)) * `[jest-cli]` Add fileChange hook for plugins ([#5708](`https://github.com/facebook/jest/pull/5708`)) * `[docs]` Add docs on using `jest.mock(...)` ([#5648](`https://github.com/facebook/jest/pull/5648`)) * `[docs]` Mention Jest Puppeteer Preset ([#5722](`https://github.com/facebook/jest/pull/5722`)) * `[docs]` Add jest-community section to website ([#5675](`https://github.com/facebook/jest/pull/5675`)) * `[docs]` Add versioned docs for v22.4 ([#5733](`https://github.com/facebook/jest/pull/5733`)) * `[docs]` Improve Snapshot Testing Guide ([#5812](`https://github.com/facebook/jest/issues/5812`)) * `[jest-runtime]` [**BREAKING**] Remove `jest.genMockFn` and `jest.genMockFunction` ([#6173](`https://github.com/facebook/jest/pull/6173`)) * `[jest-message-util]` Avoid adding unnecessary indent to blank lines in stack traces ([#6211](`https://github.com/facebook/jest/pull/6211`)) --- ### [`v22.4.4`](jestjs/jest@6851d8b...v22.4.4) [Compare Source](jestjs/jest@6851d8b...v22.4.4) --- </details> --- This PR has been generated by [Renovate Bot](https://renovatebot.com).

github-actions · 2021-05-12T16:09:32Z

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facebook-github-bot added the cla signed label May 4, 2018

SimenB commented May 4, 2018

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dependencies bot mentioned this pull request Jun 1, 2018

Update babel-jest in / from 22.1.0 to 23.0.1 leonardofaria/leozera-ui#192

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TheAlexLichter mentioned this pull request Sep 30, 2018

Allow detectOpenHandles in jest.config.js #6747

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dependencies bot mentioned this pull request Nov 1, 2018

Update jest in / from 22.1.4 to 23.6.0 leonardofaria/leozera-ui#250

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snyk-bot mentioned this pull request Mar 17, 2020

[Snyk] Upgrade expect from 23.0.0 to 23.6.0 yowainwright/react-workshop#8

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github-actions bot locked as resolved and limited conversation to collaborators May 12, 2021

Add --detectOpenHandles flag #6130

Add --detectOpenHandles flag #6130

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SimenB commented May 4, 2018 • edited Loading

Summary

Test plan

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codecov-io commented May 4, 2018 • edited Loading

Codecov Report

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github-actions bot commented May 12, 2021

Add `--detectOpenHandles` flag #6130

Add `--detectOpenHandles` flag #6130

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