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48 lines
1.1 KiB
Markdown
48 lines
1.1 KiB
Markdown
# Disallow specific matchers & modifiers (`no-restricted-matchers`)
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This rule bans specific matchers & modifiers from being used, and can suggest
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alternatives.
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## Rule Details
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Bans are expressed in the form of a map, with the value being either a string
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message to be shown, or `null` if the default rule message should be used.
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Both matchers, modifiers, and chains of the two are checked, allowing for
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specific variations of a matcher to be banned if desired.
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By default, this map is empty, meaning no matchers or modifiers are banned.
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For example:
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```json
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{
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"jest/no-restricted-matchers": [
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"error",
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{
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"toBeFalsy": null,
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"resolves": "Use `expect(await promise)` instead.",
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"not.toHaveBeenCalledWith": null
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}
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]
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}
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```
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Examples of **incorrect** code for this rule with the above configuration
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```js
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it('is false', () => {
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expect(a).toBeFalsy();
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});
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it('resolves', async () => {
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await expect(myPromise()).resolves.toBe(true);
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});
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describe('when an error happens', () => {
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it('does not upload the file', async () => {
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expect(uploadFileMock).not.toHaveBeenCalledWith('file.name');
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});
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});
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```
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