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const memoizer = require('./..');
const assert = require('chai').assert;
describe('lru-memoizer (clone)', () => {
let loadTimes = 0, memoized;
beforeEach(() => {
loadTimes = 0;
memoized = memoizer({
load: (key, callback) => {
loadTimes++;
callback(null, { foo: key, buffer: Buffer.from('1234') });
},
hash: (key) => {
return key;
},
clone: true
});
});
it('should return a clone every time with the same cached structure', (done) => {
memoized('bar', (err, r1) => {
assert.isNull(err);
assert.strictEqual(loadTimes, 1);
assert.equal(r1.foo, 'bar');
r1.foo = 'bax';
memoized('bar', (err, r2) => {
assert.isNull(err);
assert.strictEqual(loadTimes, 1);
assert.equal(r2.foo, 'bar');
assert.notStrictEqual(r1, r2);
assert.notEqual(r1, r2);
done();
});
});
});
});