import { describe, it, expect, vi, beforeEach } from 'vitest';
import { MemoryCache } from './memory-cache';

describe('MemoryCache', () => {
	it('stores and retrieves values', () => {
		const cache = new MemoryCache<string>(1000);
		cache.set('foo', 'bar');
		expect(cache.get('foo')).toBe('bar');
	});

	it('returns undefined for missing keys', () => {
		const cache = new MemoryCache<string>(1000);
		expect(cache.get('missing')).toBeUndefined();
	});

	it('expires entries after TTL', async () => {
		const cache = new MemoryCache<string>(50); // 50ms TTL
		cache.set('foo', 'bar');
		
		expect(cache.get('foo')).toBe('bar');

		await new Promise(resolve => setTimeout(resolve, 100));
		expect(cache.get('foo')).toBeUndefined();
	});

	it('respects max size', () => {
		const cache = new MemoryCache<string>(1000, 2);
		cache.set('a', '1');
		cache.set('b', '2');
		cache.set('c', '3'); // Should evict 'a'

		expect(cache.get('a')).toBeUndefined();
		expect(cache.get('b')).toBe('2');
		expect(cache.get('c')).toBe('3');
	});

	it('deletes entries', () => {
		const cache = new MemoryCache<string>(1000);
		cache.set('foo', 'bar');
		cache.delete('foo');
		expect(cache.get('foo')).toBeUndefined();
	});

	it('clears all entries', () => {
		const cache = new MemoryCache<string>(1000);
		cache.set('a', '1');
		cache.set('b', '2');
		cache.clear();
		expect(cache.get('a')).toBeUndefined();
		expect(cache.get('b')).toBeUndefined();
	});
});