blissfuljs/tests/objects/OverloadSpec.js

Lightweight helper library for modern browsers.

describe("$.overload", function() {
	var spy, funct;

	describe("with an index of zero", function() {
		beforeEach(function () {
			spy = sinon.spy();
			funct = $.overload(spy, 0);
		});

		it("retains the scope of the original function", function () {
			var that = this;
			var method = $.overload(function() {
				expect(this).to.deep.equal(that);
			});
		});

		it("handles single object as parameter", function() {
			funct({key: "val"}, "hey", "there");
			expect(spy.args[0]).to.deep.equal(["key", "val", "hey", "there"]);
		});

		it("handles string, object as parameters", function() {
			funct("key", "val", "hey", "there");
			expect(spy.args[0]).to.deep.equal(["key", "val", "hey", "there"]);
		});
	});

	describe("nested objects", function() {

		beforeEach(function () {
			spy = sinon.spy();
			funct = $.overload(spy, 1);
		});

		it("can take a nested object", function() {
			funct("before", {key: {}}, "after");
			expect(spy.args[0]).to.deep.equal(["before", "key", {}, "after"]);
		});

		it("can unfold two depths", function() {
			funct("before", {
				"mousedown": {"a": "", "span": "", "img": ""},
				"mouseup": {"a": "", "span": "", "img": ""}
			});

			expect(spy.args[0][1]).to.deep.equal("mousedown");
			expect($.type(spy.args[0][2])).to.equal("object");
		});
	});

	describe("with an index of 1", function() {
		beforeEach(function () {
			spy = sinon.spy();
			funct = $.overload(spy, 1);
		});

		it("handles single object as parameter", function() {
			funct("foo", {key: "val"}, "hey", "there");
			expect(spy.args[0]).to.deep.equal(["foo", "key", "val", "hey", "there"]);
		});

		it("handles string, object as parameters", function() {
			funct("foo", "key", "val", "hey", "there");
			expect(spy.args[0]).to.deep.equal(["foo", "key", "val", "hey", "there"]);
		});
	});
});