every.test.js•1.27 kB
"use strict";
var assert = require("@sinonjs/referee-sinon").assert;
var sinon = require("@sinonjs/referee-sinon").sinon;
var every = require("./every");
describe("util/core/every", function () {
it("returns true when the callback function returns true for every element in an iterable", function () {
var obj = [true, true, true, true];
var allTrue = every(obj, function (val) {
return val;
});
assert(allTrue);
});
it("returns false when the callback function returns false for any element in an iterable", function () {
var obj = [true, true, true, false];
var result = every(obj, function (val) {
return val;
});
assert.isFalse(result);
});
it("calls the given callback once for each item in an iterable until it returns false", function () {
var iterableOne = [true, true, true, true];
var iterableTwo = [true, true, false, true];
var callback = sinon.spy(function (val) {
return val;
});
every(iterableOne, callback);
assert.equals(callback.callCount, 4);
callback.resetHistory();
every(iterableTwo, callback);
assert.equals(callback.callCount, 3);
});
});