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chore: add mention of snapshot format change in upgrade guide #13038

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merged 2 commits into from Jul 17, 2022
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chore: add mention of snapshot format change in upgrade guide #13038

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chore: add mention of snapshot format change in upgrade guide
SimenB Jul 17, 2022
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13 changes: 13 additions & 0 deletions docs/UpgradingToJest29.md
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Expand Up @@ -14,3 +14,16 @@ See [changelog](https://github.com/facebook/jest/blob/main/CHANGELOG.md#2900) fo
## Compatibility

The supported Node versions are 14.15, 16.10, 18.0 and above.

## Snapshot format

As announced in the [Jest 28 blog post](/blog/2022/04/25/jest-28#future), Jets 29 has changed the default snapshot formatting to `{escapeString: false, printBasicPrototype: false}`.

If you want to keep the old behavior, you can set the `snapshotFormat` property to:

```diff
+ snapshotFormat: {
+ escapeString: true,
+ printBasicPrototype: true
+ }
```