forked from M3-Academy/challenge-algorithms-v2.0
42 lines
1.2 KiB
JavaScript
42 lines
1.2 KiB
JavaScript
"use strict";
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var assert = require("@sinonjs/referee-sinon").assert;
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var sinon = require("@sinonjs/referee-sinon").sinon;
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var every = require("./every");
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describe("util/core/every", function() {
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it("returns true when the callback function returns true for every element in an iterable", function() {
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var obj = [true, true, true, true];
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var allTrue = every(obj, function(val) {
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return val;
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});
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assert(allTrue);
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});
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it("returns false when the callback function returns false for any element in an iterable", function() {
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var obj = [true, true, true, false];
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var result = every(obj, function(val) {
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return val;
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});
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assert.isFalse(result);
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});
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it("calls the given callback once for each item in an iterable until it returns false", function() {
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var iterableOne = [true, true, true, true];
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var iterableTwo = [true, true, false, true];
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var callback = sinon.spy(function(val) {
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return val;
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});
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every(iterableOne, callback);
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assert.equals(callback.callCount, 4);
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callback.resetHistory();
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every(iterableTwo, callback);
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assert.equals(callback.callCount, 3);
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});
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});
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