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41 lines
1023 B
41 lines
1023 B
# Require a message for `toThrow()` (`require-to-throw-message`) |
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`toThrow()` (and its alias `toThrowError()`) is used to check if an error is |
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thrown by a function call, such as in `expect(() => a()).toThrow()`. However, if |
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no message is defined, then the test will pass for any thrown error. Requiring a |
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message ensures that the intended error is thrown. |
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## Rule details |
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This rule triggers a warning if `toThrow()` or `toThrowError()` is used without |
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an error message. |
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### Default configuration |
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The following patterns are considered warnings: |
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```js |
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test('all the things', async () => { |
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expect(() => a()).toThrow(); |
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expect(() => a()).toThrowError(); |
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await expect(a()).rejects.toThrow(); |
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await expect(a()).rejects.toThrowError(); |
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}); |
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``` |
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The following patterns are not considered warnings: |
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```js |
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test('all the things', async () => { |
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expect(() => a()).toThrow('a'); |
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expect(() => a()).toThrowError('a'); |
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await expect(a()).rejects.toThrow('a'); |
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await expect(a()).rejects.toThrowError('a'); |
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}); |
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```
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