Fabric: Enable react-test-renderer tests in the new cpp-app template #12376
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The upstream RN app template includes a jest test suite (run with `yarn test`) with a default test to render your app JS using the `react-test-renderer`. However, this only tests the iOS version of your app (it forces platform === 'ios') and therefore won't catch if there are issues in your `windows` platform files. Using `@rnx-kit/jest-preset`, you can run jest tests against any platform via a custom jest config. This PR adds `@rnx-kit/jest-preset` as a dev dependency to the new `cpp-app` template, as well as a `jest.config.windows.js` to use it. Furthermore it adds a script so users can run these tests for windows via `yarn test:windows`. To support this, I've extended the templateUtils added in microsoft#12374 to include functionality to run `npm i` / `yarn` to install any new dependencies added. Closes microsoft#11939
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marlenecota
approved these changes
Nov 17, 2023
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Description
The upstream RN app template includes a jest test suite (run with
yarn test) with a default test to render your app JS using thereact-test-renderer. However, this only tests the iOS version of your app (it forces platform === 'ios') and therefore won't catch if there are issues in yourwindowsplatform files.Using
@rnx-kit/jest-preset, you can run jest tests against any platform via a custom jest config.This PR adds
@rnx-kit/jest-presetas a dependency to the newcpp-apptemplate, as well as ajest.config.windows.jsto use it. Furthermore it adds a script so users can run these tests for windows viayarn test:windows.Finally this PR adds running
yarn test:windowsto the PR checks for testing the new app CLI.Closes #11939
Type of Change
Why
To expand test coverage options for app developers.
Closes #11939
What
See above.
Screenshots
Testing
Ran the tests in the provided RN template.
Changelog
Should this change be included in the release notes: yes
The new Fabric app template supports
yarn test:windowsto run jest app rendering tests with react-test-rendererMicrosoft Reviewers: Open in CodeFlow