72 lines
1.4 KiB
JavaScript
72 lines
1.4 KiB
JavaScript
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import { debounce } from '..';
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import { expect } from 'chai';
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/*global describe,it*/
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describe('debounce()', () => {
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it('should debounce when used as a simple decorator', next => {
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let c = {
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calls: 0,
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args: null,
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@debounce
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foo(...args) {
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c.calls++;
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c.args = args;
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c.context = this;
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}
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};
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expect(c).to.have.property('calls', 0);
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c.foo(1);
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expect(c).to.have.property('calls', 0);
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c.foo(2);
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c.foo(3);
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setTimeout( () => {
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expect(c).to.have.property('calls', 1);
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expect(c.args).to.deep.equal([3]);
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expect(c.context).to.equal(c);
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next();
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}, 20);
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});
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it('should debounce when used as a function', next => {
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let c = debounce( (...args) => {
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m.calls++;
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m.args = args;
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}),
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m = { calls:0, args:null };
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expect(m).to.have.property('calls', 0);
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c(1);
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expect(m).to.have.property('calls', 0);
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c(2);
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c(3);
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setTimeout( () => {
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expect(m).to.have.property('calls', 1);
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expect(m.args).to.deep.equal([3]);
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next();
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}, 20);
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});
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it('should support passing a delay', next => {
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let c = debounce(5, (...args) => {
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m.calls.push(args);
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}),
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m = { calls:[] };
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c(1);
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setTimeout(()=> c(2), 1);
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setTimeout(()=> c(3), 10);
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setTimeout(()=> c(4), 14);
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setTimeout(()=> c(5), 22);
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expect(m.calls).to.have.length(0);
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setTimeout( () => {
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expect(m.calls).to.deep.equal([ [2], [4], [5] ]);
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next();
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}, 30);
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});
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});
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