Add Jest 26 blog post #9950
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Add Jest 26 blog post #9950
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cpojer
commented
May 2, 2020
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Thanks for getting this started! I'll add a paragraph about new fake timers (when I land it) and one for native ESM support |
SimenB
reviewed
May 2, 2020
Codecov Report
@@ Coverage Diff @@
## master #9950 +/- ##
==========================================
- Coverage 63.92% 63.90% -0.02%
==========================================
Files 293 293
Lines 12489 12489
Branches 3080 3080
==========================================
- Hits 7983 7981 -2
- Misses 3862 3863 +1
- Partials 644 645 +1
Continue to review full report at Codecov.
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thymikee
reviewed
May 2, 2020
cpojer
commented
May 2, 2020
website/blog/2020-05-06-jest-26.md
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| * `[jest-config, jest-resolve]` Remove support for `browser` field ([#9943](https://github.com/facebook/jest/pull/9943)) | ||
| * TypeScript definitions requires a minimum of TypeScript v3.8 ([#9823](https://github.com/facebook/jest/pull/9823)) | ||
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| With the above changes Jest 26 is now 4 MiB smaller than Jest 25.5.4 (53 → 49 MiB). Please keep in mind that many dependencies like Babel are likely already part of your project. Jest's own size was reduced from 4.3 MiB to 3.1 MiB. |
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Added the sizes comparing 26 alpha and 25.5.4.
cpojer
commented
May 2, 2020
website/blog/2020-05-06-jest-26.md
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| With the above changes Jest 26 is now 4 MiB smaller than Jest 25.5.4 (53 → 49 MiB). Please keep in mind that many dependencies like Babel are likely already part of your project. Jest's own size was reduced from 4.3 MiB to 3.1 MiB. | ||
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| While this is a good start, it isn’t enough to make Jest meaningfully leaner. We are planning on gradually reducing Jest's size by about 70%. Most of the changes to reduce Jest’s default setup will be small breaking changes and we want to bring the community with us as much as possible. Therefore we will make the following changes in Jest 27 and Jest 28 using a [“Tick-Tock" release process](https://en.wikipedia.org/wiki/Tick%E2%80%93tock_model): |
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I think 70% is reasonable if we remove Babel, Jasmine and JSDOM from the default install. Removing all of them likely has a bigger effect than removing them one by one as some transitive deps are probably shared.
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orta
reviewed
May 3, 2020
cpojer
commented
May 3, 2020
SimenB
reviewed
May 3, 2020
SimenB
reviewed
May 3, 2020
website/blog/2020-05-06-jest-26.md
Outdated
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| * Dropped support for Node 8 ([#9423](https://github.com/facebook/jest/pull/9423)) | ||
| * `[jest-environment-jsdom]` Upgrade `jsdom` to v16 ([#9606](https://github.com/facebook/jest/pull/9606)) | ||
| * `[jest-runtime]` Remove long-deprecated `require.requireActual` and `require.requireMock` methods ([#9854](https://github.com/facebook/jest/pull/9854)) |
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we should call out the lint rule that will autofix this for folks
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SimenB
reviewed
May 3, 2020
SimenB
reviewed
May 4, 2020
website/blog/2020-05-06-jest-26.md
Outdated
| * `[jest-haste-map]` Removed `providesModuleNodeModules` ([#8535](https://github.com/facebook/jest/pull/8535)) | ||
| * `[jest-circus]` Fail tests if a test takes a done callback and have return values ([#9129](https://github.com/facebook/jest/pull/9129)) | ||
| * `[jest-circus]` Throw a proper error if a test / hooks is defined asynchronously ([#8096](https://github.com/facebook/jest/pull/8096)) | ||
| * ***TODO*** |
eps1lon
reviewed
May 4, 2020
jeysal
reviewed
May 4, 2020
jeysal
reviewed
May 4, 2020
Co-authored-by: Orta <orta.therox+github@gmail.com>
Co-authored-by: Orta <orta.therox+github@gmail.com>
Co-authored-by: Orta <orta.therox+github@gmail.com>
Co-authored-by: Simen Bekkhus <sbekkhus91@gmail.com>
Co-authored-by: Simen Bekkhus <sbekkhus91@gmail.com>
Co-authored-by: Tim Seckinger <seckinger.tim@gmail.com>
Co-authored-by: Tim Seckinger <seckinger.tim@gmail.com>
Co-authored-by: Tim Seckinger <seckinger.tim@gmail.com>
Co-authored-by: Tim Seckinger <seckinger.tim@gmail.com>
rickhanlonii
reviewed
May 5, 2020
SimenB
reviewed
May 5, 2020
Co-authored-by: Simen Bekkhus <sbekkhus91@gmail.com>
Co-authored-by: Simen Bekkhus <sbekkhus91@gmail.com>
Co-authored-by: Simen Bekkhus <sbekkhus91@gmail.com>
Co-authored-by: Simen Bekkhus <sbekkhus91@gmail.com>
MichaelDeBoey
suggested changes
May 5, 2020
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Jest 26, yeah!