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chore(docs): add waitForValueToChange shim to migration guide #924

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14 changes: 14 additions & 0 deletions MIGRATION_GUIDE.md
Original file line number Diff line number Diff line change
Expand Up @@ -115,6 +115,20 @@ APIs. A similar result can be achieved by using `waitFor`:
+});
```

Alternatively this utility can be implemented as the following, for a direct migration:

```ts
import { waitFor } from '@testing-library/react';

const waitForValueToChange = async <T>(getValue: () => T) => {
const original = getValue();

await waitFor(async () => {
expect(await original).not.toBe(await getValue());
});
};
```

## `waitForNextUpdate`

This utility has not been included in the React Testing Library or React Native Testing Library
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