test-multiple-setups

more than one setup factory call in one test

Deterministic checkadvisory by defaultbasetests

The argument

This rule states its summary and proves it with an example.

The proof

failsubject.unit.test.ts

import { expect, describe, test } from '@jest/globals';
import { getLabel } from './getLabel';

const setupLabel = ({ name = 'Ada' }: { name?: string } = {}) => {
	return { name };
};

const setupFallbackLabel = () => {
	return { name: '' };
};

describe('getLabel', () => {
	test('trims the name it is given', () => {
		const { name } = setupLabel({ name: ' Ada ' });
		const fallback = setupFallbackLabel();

		const label = getLabel({ name: name || fallback.name });

		expect(label).toBe('Ada');
	});
});

pass

import { expect, describe, test } from '@jest/globals';
import { describeRule } from './describeRule';

const setupRule = ({ id = 'test-shared-let' }: { id?: string } = {}) => {
	return { id };
};

// A rule about arrangement has to quote `setup()` in the guidance it renders,
// and the expected text is not a second call — it is what the assertion pins.
describe('describeRule', () => {
	test('renders the guidance the rule ships', () => {
		const { id } = setupRule();

		const described = describeRule({ id });

		expect(described.guidance).toBe('Arrange in a `setup()` factory that returns its locals as consts.');
	});
});

Turn it down

Both lines go in your lightsout.config.json.

"standards-checks": { "test-multiple-setups": "advisory" }

"standards-checks": { "test-multiple-setups": "off" }