@v4fire/core/src/core/cache/never/spec.js

V4Fire core library

/*!
 * V4Fire Core
 * https://github.com/V4Fire/Core
 *
 * Released under the MIT license
 * https://github.com/V4Fire/Core/blob/master/LICENSE
 */

import NeverCache from 'core/cache/never';

describe('core/cache/never', () => {
	it('crud', () => {
		const cache = new NeverCache();
		expect(cache.has('foo')).toBe(false);
		expect(cache.set('foo', 1)).toBe(1);
		expect(cache.get('foo')).toBeUndefined();
		expect(cache.has('foo')).toBe(false);
		expect(cache.size).toBe(0);
		expect(cache.remove('foo')).toBeUndefined();
		expect(cache.has('foo')).toBe(false);
	});

	it('default iterator', () => {
		const
			cache = new NeverCache();

		cache.set('1', 1);
		cache.set('2', 2);

		expect(cache[Symbol.iterator]().next()).toEqual({value: undefined, done: true});
		expect([...cache]).toEqual([]);
	});

	it('`keys`', () => {
		const
			cache = new NeverCache();

		cache.set('1', 1);
		cache.set('2', 2);

		expect([...cache.keys()]).toEqual([]);
	});

	it('`values`', () => {
		const
			cache = new NeverCache();

		cache.set('1', 1);
		cache.set('2', 2);

		expect([...cache.values()]).toEqual([]);
	});

	it('`entries`', () => {
		const
			cache = new NeverCache();

		cache.set('1', 1);
		cache.set('2', 2);

		expect([...cache.entries()]).toEqual([]);
	});

	it('`clear`', () => {
		const cache = new NeverCache();

		cache.set('foo', 1);
		cache.set('bar', 2);

		expect(cache.clear()).toEqual(new Map([]));
	});

	it('`clear` with a filter', () => {
		const cache = new NeverCache();

		cache.set('foo', 1);
		cache.set('bar', 2);

		expect(cache.clear((el) => el > 1)).toEqual(new Map([]));
	});
});