rsnext/packages/next/build/jest/__mocks__/fileMock.js
Balázs Orbán 2060d0e3e9
fix(image): don't show placeholder warning in Jest (#41329)
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
2022-10-11 16:06:54 +02:00

6 lines
117 B
JavaScript

module.exports = {
src: '/img.jpg',
height: 40,
width: 40,
blurDataURL: 'data:image/png;base64,imagedata',
}