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46 lines
991 B
Markdown
46 lines
991 B
Markdown
# Disallow using `exports` in files containing tests (`no-export`)
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Prevents using `exports` if a file has one or more tests in it.
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## Rule Details
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This rule aims to eliminate duplicate runs of tests by exporting things from
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test files. If you import from a test file, then all the tests in that file will
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be run in each imported instance, so bottom line, don't export from a test, but
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instead move helper functions into a separate file when they need to be shared
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across tests.
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Examples of **incorrect** code for this rule:
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```js
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export function myHelper() {}
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module.exports = function() {};
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module.exports = {
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something: 'that should be moved to a non-test file',
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};
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describe('a test', () => {
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expect(1).toBe(1);
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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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function myHelper() {}
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const myThing = {
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something: 'that can live here',
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};
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describe('a test', () => {
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expect(1).toBe(1);
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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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