61 lines
1.2 KiB
Markdown
61 lines
1.2 KiB
Markdown
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# Disallow string interpolation inside snapshots (`no-interpolation-in-snapshots`)
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Prevents the use of string interpolations in snapshots.
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## Rule Details
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Interpolation prevents snapshots from being updated. Instead, properties should
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be overloaded with a matcher by using
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[property matchers](https://jestjs.io/docs/en/snapshot-testing#property-matchers).
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Examples of **incorrect** code for this rule:
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```js
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expect(something).toMatchInlineSnapshot(
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`Object {
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property: ${interpolated}
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}`,
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);
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expect(something).toMatchInlineSnapshot(
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{ other: expect.any(Number) },
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`Object {
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other: Any<Number>,
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property: ${interpolated}
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}`,
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);
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expect(errorThrowingFunction).toThrowErrorMatchingInlineSnapshot(
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`${interpolated}`,
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);
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```
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Examples of **correct** code for this rule:
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```js
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expect(something).toMatchInlineSnapshot();
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expect(something).toMatchInlineSnapshot(
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`Object {
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property: 1
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}`,
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);
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expect(something).toMatchInlineSnapshot(
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{ property: expect.any(Date) },
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`Object {
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property: Any<Date>
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}`,
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);
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expect(errorThrowingFunction).toThrowErrorMatchingInlineSnapshot();
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expect(errorThrowingFunction).toThrowErrorMatchingInlineSnapshot(
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`Error Message`,
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);
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```
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## When Not To Use It
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Don't use this rule on non-jest test files.
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