sync/test/util/simple-cache.js

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2022-09-20 05:59:06 +00:00
const { SimpleCache } = require('../../lib/util/simple-cache');
const assert = require('assert');
describe('SimpleCache', () => {
const CACHE_MAX_ELEM = 5;
const CACHE_MAX_AGE = 5;
let cache;
beforeEach(() => {
cache = new SimpleCache({
maxElem: CACHE_MAX_ELEM,
maxAge: CACHE_MAX_AGE
});
});
it('sets, gets, and deletes a value', () => {
assert.strictEqual(cache.get('foo'), null);
cache.put('foo', 'bar');
assert.strictEqual(cache.get('foo'), 'bar');
cache.delete('foo');
assert.strictEqual(cache.get('foo'), null);
});
it('does not return an expired value', done => {
cache.put('foo', 'bar');
setTimeout(() => {
assert.strictEqual(cache.get('foo'), null);
done();
}, CACHE_MAX_AGE + 1);
});
it('cleans up old values', done => {
cache.put('foo', 'bar');
setTimeout(() => {
assert.strictEqual(cache.get('foo'), null);
done();
}, CACHE_MAX_AGE * 2);
});
it('removes the oldest entry if max elem is reached', () => {
for (let i = 0; i < CACHE_MAX_ELEM + 1; i++) {
cache.put(`foo${i}`, 'bar');
}
assert.strictEqual(cache.get('foo0'), null);
assert.strictEqual(cache.get('foo1'), 'bar');
});
});