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