Summary:
Pull Request resolved: https://github.com/facebook/react-native/pull/42827
This is a simple snapshot test using ReactTestRender's toJSON. We have almost the same functionality in RNTR already, so let's see if we can support tests like this.
Merging the new setup and environment with the existing configuration (https://fburl.com/code/s85sma77) still causes issues so here we add unmocking and new setup inline. Added task T177114228 to track following up on this
Note that some formatting is changed and props are dropped on the snapshot. This is resolved with refactor in next diff
Changelog: [internal]
Reviewed By: yungsters
Differential Revision: D53321823
fbshipit-source-id: a20f77c29fefb9172f8a8189bd821dd202b2ff02
Summary:
The goal is to provide testing utilities that use Fabric and concurrent rendering by default to support the new RN architecture. Currently most testing is done through ReactTestRenderer, which is an overly-simplified rendering environment, non-concurrent by default, and over exposes internals. A dedicated RN environment in JS can allow for more realistic test execution.
This is the initial commit to create the `react-native-test-renderer` package. It currently only offers a simple toJSON() method on the root of a test, which is used for snapshot unit tests. We will be iterating here to add a query interface, event handling, and more.
## Changelog:
[GENERAL] [ADDED] - Added react-native-test-renderer package for Fabric rendered integration tests
Pull Request resolved: https://github.com/facebook/react-native/pull/42644
Test Plan:
```
$> cd packages/react-native-test-renderer
$> yarn jest
```
Output:
```
PASS src/renderer/__tests__/render-test.js
render
toJSON
✓ returns expected JSON output based on renderer component (7 ms)
Test Suites: 1 passed, 1 total
1 passed, 1 total
Snapshots: 1 passed, 1 total
Time: 2.869 s
```
Reviewed By: yungsters
Differential Revision: D53183101
Pulled By: jackpope
fbshipit-source-id: 8e29ba35f55f6c4eb2613ab106bc669d72f33d1d
Jack Pope