import { beforeEach,describe, expect, it } from 'vitest';
import { cacheStats,clearCache, getCached, setCache } from '../../src/utils/cache.js';
describe('cache', () => {
beforeEach(() => {
clearCache();
});
it('stores and retrieves values', () => {
setCache('key1', { rate: 83.12 });
expect(getCached('key1')).toEqual({ rate: 83.12 });
});
it('returns null for missing keys', () => {
expect(getCached('nonexistent')).toBeNull();
});
it('respects TTL expiration', async () => {
setCache('short-ttl', 'value', 50); // 50ms TTL
expect(getCached('short-ttl')).toBe('value');
await new Promise((resolve) => { setTimeout(resolve, 60); });
expect(getCached('short-ttl')).toBeNull();
});
it('tracks hit and miss stats', () => {
setCache('tracked', 42);
getCached('tracked'); // hit
getCached('missing'); // miss
const stats = cacheStats();
expect(stats.hits).toBe(1);
expect(stats.misses).toBe(1);
expect(stats.size).toBe(1);
});
it('evicts oldest entries when full', () => {
// Fill cache to max (500 entries)
for (let i = 0; i < 500; i++) {
setCache(`entry-${i}`, i);
}
expect(cacheStats().size).toBe(500);
// Adding one more should evict the oldest
setCache('new-entry', 'fresh');
expect(cacheStats().size).toBe(500);
expect(getCached('new-entry')).toBe('fresh');
});
it('clears all entries and resets stats', () => {
setCache('a', 1);
setCache('b', 2);
getCached('a');
clearCache();
expect(cacheStats()).toEqual({ size: 0, hits: 0, misses: 0 });
expect(getCached('a')).toBeNull();
});
});
