src/lib/utils/resolve_after.test.ts


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import { resolveAfter } from './resolve_after';

describe('Resolve After', () => {
	test('it should throw if given 0', () => {
		expect(() => {
			resolveAfter(0);
		}).toThrow();
	});

	test('it should throw if given a negative number', () => {
		expect(() => {
			resolveAfter(-1);
		}).toThrow();
	});

	test('it should resolve after the specified number of times', () => {
		expect(() => {
			const { counter, promise: resolveAfterThree } = resolveAfter(3);
			let resolved = false;

			resolveAfterThree.then(() => (resolved = true));
			counter();
			expect(resolved).toBe(false);
			counter();
			expect(resolved).toBe(false);
			counter();
			expect(resolved).toBe(true);
		}).toThrow();
	});
});