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`
* chore: convert Jest examples to TypeScript
* test: use absolute imports in test files
* chore: address review comments
* fix: add pages to tsconfig.json paths
* fix: add styles to tsconfig.json paths
* chore: upgrade dependencies/snapshots
* docs: match Testing docs with example code
* docs: link to docs from mock test files
Co-authored-by: Lee Robinson <me@leerob.io>