In Jest, we were mocking the `next/image` imports with a width and
height of `24`. If the developer set `placeholder="blur"` on their
images though, this triggered the warning:
> Image with src "/img.jpg" is smaller than 40x40. Consider removing the
"placeholder='blur'" property to improve performance.
Since we cannot reliably hide this warning without knowing the actual
image dimensions, and we also provide a `blurDataURL` by default, we
should increase the mock image size to suppress the warning.
Note that using `moduleNameMapper` in `jest.config.js`, the developer
can already tweak the mock behavior:
a78163dc61/packages/next/build/jest/jest.ts (L111-L121)Fixes#41248
The default mock value caused `next/image` to throw an error.
Fixes#33976
## Bug
- [ ] Related issues linked using `fixes #number`
- [ ] Integration tests added
- [ ] Errors have helpful link attached, see `contributing.md`
## Feature
- [ ] Implements an existing feature request or RFC. Make sure the feature request has been accepted for implementation before opening a PR.
- [ ] Related issues linked using `fixes #number`
- [ ] Integration tests added
- [ ] Documentation added
- [ ] Telemetry added. In case of a feature if it's used or not.
- [ ] Errors have helpful link attached, see `contributing.md`
## Documentation / Examples
- [ ] Make sure the linting passes by running `yarn lint`
