89 lines
2.1 KiB
JavaScript
89 lines
2.1 KiB
JavaScript
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var memoizer = require('./..');
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var assert = require('chai').assert;
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describe('lru-memoizer', function () {
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var loadTimes = 0, memoized;
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beforeEach(function () {
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loadTimes = 0;
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memoized = memoizer({
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load: function (a, b, callback) {
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loadTimes++;
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return setTimeout(function () {
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if (a === 0) {
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return callback(new Error('a cant be 0'));
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}
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callback(null, a+b);
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}, 10);
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},
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hash: function (a, b) {
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return a + '-' + b;
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},
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max: 10
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});
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});
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it('should cache the result of an async function', function (done) {
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memoized(1,2, function (err, result) {
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assert.isNull(err);
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assert.strictEqual(result, 3);
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assert.strictEqual(loadTimes, 1);
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memoized(1,2, function (err, result) {
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assert.isNull(err);
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assert.strictEqual(result, 3);
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assert.strictEqual(loadTimes, 1);
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done();
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});
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});
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});
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it('should use the hash function for keys', function (done) {
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memoized(1, 2, function () {
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memoized(2,3, function () {
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assert.includeMembers(memoized.keys(), ['1-2', '2-3']);
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done();
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});
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});
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});
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it('should not cache errored funcs', function (done) {
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memoized(0, 2, function (err) {
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assert.isNotNull(err);
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assert.notInclude(memoized.keys(), ['0-2']);
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done();
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});
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});
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it('should expose the hash function', function() {
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assert.equal(memoized.hash(0, 2), '0-2');
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});
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it('should expose the load function', function(done) {
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memoized.load(1, 2, (err, result) => {
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assert.equal(result, 3);
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done();
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});
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});
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it('should expose the max prop', function() {
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assert.equal(memoized.max, 10);
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});
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it('should allow to del a key', function(done) {
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memoized(1,2, () => {
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assert.strictEqual(loadTimes, 1);
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memoized.del(1,2);
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memoized(1,2, (err, result) => {
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assert.isNull(err);
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assert.strictEqual(result, 3);
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assert.strictEqual(loadTimes, 2);
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done();
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});
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});
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});
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});
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