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-rw-r--r--tests/memoize.js72
1 files changed, 72 insertions, 0 deletions
diff --git a/tests/memoize.js b/tests/memoize.js
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+++ b/tests/memoize.js
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+import { memoize } from '..';
+import { expect } from 'chai';
+
+/*global describe,it*/
+
+describe('memoize()', () => {
+ it('should memoize when used as a simple decorator', next => {
+ let c = {
+ @memoize
+ foo(key) {
+ c[key] = (c[key] || 0) + 1;
+ }
+ };
+
+ expect(c).not.to.have.property('a');
+ c.foo('a');
+ expect(c).to.have.property('a', 1);
+ c.foo('a');
+ c.foo('a');
+ expect(c).to.have.property('a', 1);
+
+ next();
+ });
+
+ it('should memoize when used as a function', next => {
+ let c = memoize( key => {
+ m[key] = (m[key] || 0) + 1;
+ }),
+ m = {};
+
+ expect(m).not.to.have.property('a');
+ c('a');
+ expect(m).to.have.property('a', 1);
+ c('a');
+ c('a');
+ expect(m).to.have.property('a', 1);
+
+ next();
+ });
+
+ it('should memoize when called without arguments', next => {
+ let c = memoize( key => {
+ m[key] = (m[key] || 0) + 1;
+ }),
+ m = {};
+
+ expect(m).not.to.have.property('undefined');
+ c();
+ expect(m).to.have.property('undefined', 1);
+ c();
+ c();
+ expect(m).to.have.property('undefined', 1);
+
+ next();
+ });
+
+ it('should memoize when called with an empty string', next => {
+ let c = memoize( key => {
+ m[key] = (m[key] || 0) + 1;
+ }),
+ m = {};
+
+ expect(m).not.to.have.property('');
+ c('');
+ expect(m).to.have.property('', 1);
+ c('');
+ c('');
+ expect(m).to.have.property('', 1);
+
+ next();
+ });
+});