noExportsInTest
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Diagnostic Category: lint/suspicious/noExportsInTest
Since: v1.6.0
Sources:
- Inspired from:
jest/no-export
Disallow using export or module.exports in files containing tests
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
Section titled ExamplesInvalid
Section titled Invalidexport function myHelper() {}describe('a test', () => { expect(1).toBe(1);});code-block.js:1:1 lint/suspicious/noExportsInTest ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
✖ Do not export from a test file.
> 1 │ export function myHelper() {}
│ ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
2 │ describe(‘a test’, () => {
3 │ expect(1).toBe(1);
Valid
Section titled Validfunction myHelper() {}describe('a test', () => { expect(1).toBe(1);});