Most fo this suite of tests covers mutator functions for arrays

Arrays.prototype part2

(function () {

    describe("Array", function () {

        //part 2

        it("Array push()", function () {
            var arr = [];

            arr.push(2);

            expect(arr.length).toBe(1);
        });

        it("Array pop()", function () {
            var arr = [0, 1, 2];

            arr.pop();

            expect(arr).toEqual([0, 1]);
        });

        it("Array unshift()", function () {
            var arr = [1, 2];

            arr.unshift(0);


            expect(arr).toEqual([0, 1, 2]);
        });


        it("Array shift", function () {
            var arr = [1, 2];

            arr.shift();

            expect(arr).toEqual([2]);
        });


        it("Array splice()", function () {

            var arr = [1, 2, 3, 4, 5];
            var spliced = arr.splice(0, 3);


            expect(spliced).toEqual([1, 2, 3]);
            expect(arr).toEqual([4,5]);
        });

        it("Array concat()", function () {
            var arr = [1,2,3,4,5];
            var arr2 = [6,7,8,9,0];

            var concatenated = arr2.concat(arr);

            expect(concatenated).toEqual([6,7,8,9,0,1,2,3,4,5])
        });


        it("Array join()", function () {
            var arr = [1,2,3,4];
            var joined = arr.join("");

            expect(joined).toEqual('1234');
        });

        it("Array indexOf()", function () {
            var arr = [1,4,3,2];

            var idx = arr.indexOf(4);

            expect(idx).toBe(1);

        })


    });


}());