Inverting colors in snapshot tests

[ghost]

💬 Questions and Help

I'm using create-react-app with jest for snapshot tests. Here's a sample output:

My team is finding this a bit difficult to grok, since the usual diff format they're used to (unix diff and git), uses red for an existing value, and green for the new value. Jest uses the opposite. I understand why it's done this way from the docs, but it's quite jarring in practice.

Is there a way to invert these colors?

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[quantizor]

The output is technically correct when you consider the intention of the test.

When a snapshot has been written, it's considered the source of truth. Thus any diff to the snapshot introduced by a new test run would show in red, since it as a deviation from the source of truth.

[quantizor]

If anything, the green color could probably be changed to something else to remove this false allusion to standard diffs. Perhaps just white.

[SimenB]

Duplicate of #5430

[github-actions]

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