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Upgrading babel-jest 19 to 20

Breaking19.0.0 → 20.0.3Breaking6New20Changed3Fixed34Other15

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BreakingUpgrade verdict

6 breaking changes.

In plain terms
  • On continuous integration, missing snapshots are not created automatically, so tests fail instead.
  • Deletes the `jest-file-exists` package.
  • Removes the `Config` type.
  • Jest no longer loads babel-polyfill automatically; only regenerator-runtime is loaded, which fixes a memory leak.
Must act Top 3 of 6 that need code or config changes

What you must change

Breaking6
Jest no longer writes new snapshots by default on CI.
20.0.0GitHub ReleaseSummarizedView source
Deletes the jest-file-exists package.
jest-file-exists
20.0.0GitHub ReleaseSummarizedView source
Removes the Config type.
Config
20.0.0GitHub ReleaseSummarizedView source
Replaces auto-loading of babel-polyfill with only regenerator-runtime, fixing a major memory leak.
babel-polyfillregenerator-runtime
20.0.0GitHub ReleaseSummarizedView source
Forks Jasmine 2.5 into Jest's own test runner and rewrites large parts of Jasmine.
20.0.0GitHub ReleaseSummarizedView source
Moves the typescript parser from jest-editor-support into a separate jest-test-typescript-parser package.
jest-editor-supportjest-test-typescript-parser
20.0.0GitHub ReleaseSummarizedView source