73 lines
1.3 KiB
JavaScript
73 lines
1.3 KiB
JavaScript
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import { memoize } from '..';
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import { expect } from 'chai';
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/*global describe,it*/
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describe('memoize()', () => {
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it('should memoize when used as a simple decorator', next => {
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let c = {
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@memoize
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foo(key) {
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c[key] = (c[key] || 0) + 1;
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}
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};
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expect(c).not.to.have.property('a');
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c.foo('a');
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expect(c).to.have.property('a', 1);
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c.foo('a');
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c.foo('a');
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expect(c).to.have.property('a', 1);
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next();
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});
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it('should memoize when used as a function', next => {
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let c = memoize( key => {
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m[key] = (m[key] || 0) + 1;
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}),
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m = {};
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expect(m).not.to.have.property('a');
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c('a');
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expect(m).to.have.property('a', 1);
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c('a');
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c('a');
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expect(m).to.have.property('a', 1);
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next();
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});
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it('should memoize when called without arguments', next => {
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let c = memoize( key => {
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m[key] = (m[key] || 0) + 1;
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}),
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m = {};
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expect(m).not.to.have.property('undefined');
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c();
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expect(m).to.have.property('undefined', 1);
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c();
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c();
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expect(m).to.have.property('undefined', 1);
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next();
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});
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it('should memoize when called with an empty string', next => {
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let c = memoize( key => {
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m[key] = (m[key] || 0) + 1;
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}),
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m = {};
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expect(m).not.to.have.property('');
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c('');
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expect(m).to.have.property('', 1);
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c('');
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c('');
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expect(m).to.have.property('', 1);
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next();
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});
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});
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