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992 B
992 B
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:
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:
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.