blissfuljs/tests/arrays/AllSpec.js

Lightweight helper library for modern browsers.

describe("$.all", function() {

	it("exists", function() {
		expect($.all).to.exist;
		expect([]._.all).to.exist;
	});

	it("returns the value of the method for each item in the array", function () {
		var arr = ["Foo", "bar"];
		var result = $.all(arr, "toUpperCase");

		expect(result[0]).to.equal("FOO");
		expect(result[1]).to.equal("BAR");
		expect(result).to.deep.equal(arr._.all("toUpperCase"));
	});

	it("returns the original array if method returns nothing", function() {
		var Obj = function () {
			this.method = function () {};

			return this;
		};
		var arr = [new Obj(), new Obj(), new Obj()];
		var result = $.all(arr, "method");

		expect(result).to.deep.equal(arr);
	});

	describe("the method invoked by $.all", function() {
		var Obj, arr;

		beforeEach(function () {
			Obj = function() {
				this.method = sinon.spy();
				return this;
			},
			arr = [new Obj(), new Obj(), new Obj()];
		});

		it("calls once for each item in the array", function() {
			var result = $.all(arr, "method");
			expect(result.length).to.equal(3);

			arr.forEach(function (item) {
				expect(item.method.calledOnce).to.be.true;
			});

			expect(result).to.deep.equal(arr._.all("method"));
		});

		it("can take single params", function() {
			var result = $.all(arr, "method", "foo");
			arr.forEach(function (item) {
				expect(item.method.calledWith("foo")).to.be.true;
			});
		});

		it("can accept multiple params", function() {
			var result = $.all(arr, "method", ["foo", "bar"]);
			arr.forEach(function (item) {
				expect(item.method.calledWith(["foo", "bar"])).to.be.true;
			});
		});
	});

});