单元测试以检查数组是否反转

Question

I have the following code and I am trying to write a Jasmine unit test that will check if the array is reversed. I have created a fiddle with my attempt and can see what is wrong, the current test is checking if it is equal but I want to be specific and check if it is reversed. What is the correct way to implement this?

http://jsfiddle.net/37qnmahk/4/

Code:

    $scope.reverse = function(array) {
        var copy = [].concat(array);
        return copy.reverse();
    };

Unit test:

describe('reverse', function() {
    it('passes if array is reversed', function() {
        var arr = [1, 2, 3];
        scope.reverse();
        scope.$digest();
        expect(arr).toEqual([3, 2, 1]);
    });
});

Answer 1

Actually in the test, after declaring the array, you should call your reverse function.

describe('reverse', function() {
    it('passes if array is reversed', function() {
        var arr = [1, 2, 3];
        //call your reverse function here
        expect(arr).toEqual([3, 2, 1]);
    });
});