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chore(docs): Update Jest instructions for v27 #31649

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May 31, 2021
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chore(docs): Update Jest instructions for v27 #31649

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afbd2d6
Update unit-testing docs according to change in Jest v27.0.0 for crea…
sj-rai May 29, 2021
8c5d526
Update unit-testing.md
LekoArts May 31, 2021
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5 changes: 4 additions & 1 deletion docs/docs/how-to/testing/unit-testing.md
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Expand Up @@ -65,9 +65,12 @@ const babelOptions = {
presets: ["babel-preset-gatsby"],
}

module.exports = require("babel-jest").createTransformer(babelOptions)
module.exports = require("babel-jest").default.createTransformer(babelOptions)
```

> **Note:** If you're using Jest 26.6.3 or below, the last line has to be changed to
> `module.exports = require("babel-jest").createTransformer(babelOptions)`

- The next option is `moduleNameMapper`. This
section works a bit like webpack rules and tells Jest how to handle imports.
You are mainly concerned here with mocking static file imports, which Jest can't
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