4.0.0-beta.8 (2020-09-22)

Bug Fixes

• instrumenter: ignore declare syntax (b1faa16)

Features

• core: add --cleanTempDir cli option (6ef792c)
• instrumenter: improve placement error (12e097e)

4.0.0-beta.7 (2020-09-17)

Bug Fixes

• core: allow skipped tests when matching mutants (#2487) (09eacee), closes #2485
• instrumenter: don't mutate constructor blocks with initialized class properties (#2484) (ca464a3), closes #2474
• instrumenter: place mutants in if statements (#2481) (4df4102), closes #2469

4.0.0-beta.6 (2020-09-10)

Bug Fixes

• instrumenter: skip as expressions (#2471) (2432d84)

4.0.0-beta.5 (2020-09-09)

Bug Fixes

• jasmine-runner: fix memory leaks (457d807)
• mocha-runner: don't allow custom timeout (#2463) (e90b563)
• mocha-runner: fix memory leaks (23eede2)
• reporters: correctly report avg tests/mutants (#2458) (582e01b)

Features

• mutate: a new default for mutate (#2452) (673516d), closes #2384
• typescript: Disable type checking (#2446) (3ff996b), closes #2438

4.0.0-beta.4 (2020-08-29)

Bug Fixes

• input files: support emojis in file names (#2430) (139f9f3)
• input files: support emojis in file names (#2433) (b5feae2)

Features

• api: rename test_runner2 -> test_runner (#2442) (4d3ae97)
• jest-runner: switch mutants using env (#2416) (cad01ba)
• karma-runner: force bail = true in all cases (ba928a1)
• options: deprecate old stryker options (#2395) (7c637c8)
• reporter-api: support mutation switching (67f1ed5)
• test-runner: add nrOfTests metric (0eea448)
• wct-runner: drop support for wct (#2440) (7c55424)

Performance Improvements

• express: add benchmark express (#2431) (7cfb8f1)

BREAKING CHANGES

• api: Plugin creators should now use 'test_runner' instead of 'test_runner2'.
• wct-runner: The @stryker-mutator/wct-runner package is dropped in Stryker 4.0. Please see https://github.com/stryker-mutator/stryker/issues/2386 for more details. Feel free to keep using @stryker-mutator/wct-runner@3 or start a community fork. Note that support for the web-component-tester itself is minimal, you might want to consider switching to a different test runner. Stryker still supports Mocha, Jest, Jasmine and Karma.
• reporter-api: The onMutantTested and onAllMutantsTested methods on the Reporter api have changed

4.0.0-beta.3 (2020-08-19)

Bug Fixes

• core: exit process on error (#2378) (af18a59), closes #2315
• exit prematurely: exit when no tests were executed (#2380) (6885e16)
• instrumenter: support anonymous function names (#2388) (c7d150a), closes #2362

Features

• core: add ability to override file headers (#2363) (430d6d3)
• core: strip comments in sandbox (#2365) (55f27f2), closes #2364
• instrumenter: add support for .mjs and .cjs file formats (#2391) (5ba4c5c)
• jest-runner: remove deprecated project types (#2361) (d0aa5c3)
• mocha: deprecate mocha < v6 (#2379) (fee0754)
• test runner api: remove sandboxFileNames injectable values (#2369) (92f3bf5), closes #2351

BREAKING CHANGES

• exit prematurely: Stryker will now exit with exit code 1 when no tests were executed in the initial test run.
• mocha: Mocha@<6 is deprecated and support for it will be removed in Stryker v5
• jest-runner: Project types react and react-ts has been removed. Please use create-react-app and create-react-app-ts respectively

4.0.0-beta.2 (2020-08-07)

Bug Fixes

• ArrowFunction mutator: don't mutate () => undefined (#2313) (310145e)
• instrumenter: don't mutate string literals in object properties (#2354) (cd43952)
• mutator: issue with block statement mutator (#2342) (aaa4ff6), closes #2314

Features

• command: Support command test runner with mutation switching (#2345) (59b1cfc)
• jest-runner: support mutation switching (#2350) (9e6e6e0)

4.0.0-beta.1 (2020-07-17)

Bug Fixes

• Jest: Notify users of lacking Jest support (#2322) (0bbc0c1)

4.0.0-beta.0 (2020-07-10)

Bug Fixes

• buildCommand: allow for a single command string in posix (77b6a20)
• instrumenter: don't mutate require (963e289)
• jasmine-runner: update deprecated api calls (#2250) (b6d6dfd)
• karma-runner: mocha filtering with / (#2290) (3918633)
• reporter: report event order (#2311) (ceb73a8)
• sandbox: exec build command before symlink (bd25cd6)
• typescript-checker: support empty files (#2310) (284a28c)

Features

• api: add id to Mutant interface (#2255) (cfc9053)
• api: add new test runner api (#2249) (bbbc308)
• api: remove support for options editors (5e56d0e)
• checker: add checker api (#2240) (d463f86), closes #1514 #1980
• core: add support for checker plugins (#2285) (69358e1)
• core: support build command (f71ba87)
• html-parser: add // [@ts-nocheck](https://github.com/ts-nocheck) to scripts (8ceff31)
• instrumenter: add mutant placers (#2224) (0e05025)
• instrumenter: add parsers (#2222) (3b57ef2)
• instrumenter: add the mutation testing instrumenter (#2212) (197e177)
• instrumenter: add transformers (#2234) (61c8fe6)
• instrumenter: allow override of babel plugins (8758cfd)
• instrumenter: implement Instrumenter class (8df9172)
• jasmine-runner: implement new test runner api (#2256) (871db8c), closes #2249
• mutator: remove Mutator API (3ca89cf)
• mutators: add mutators to instrumenter package (#2266) (3b87743)
• sandbox: add ignore header to js files (#2291) (3adde83), closes #2276
• test-framework: remove TestFramework API (fe5e200)
• transpiler: remove Transpiler API (06f668b)
• tsconfig: rewrite tsconfig references (#2292) (4ee4950), closes #2276
• typescript-checker: a typescript type checker plugin (#2241) (42adb95), closes /github.com/stryker-mutator/stryker/blob/f44008993a543dc3f38ca99516f56d315fdcb735/packages/typescript/src/transpiler/TranspilingLanguageService.ts#L23 #391

BREAKING CHANGES

• core: * --maxConcurrentTestRunners is now deprecated. Please use --concurrency instead.