Jasmine js comparing arrays

Question

Is there a way in jasmine js to check if two arrays are equal  for example   arr    1  2  3  expect arr  toBe  1  2  3   expect arr  toEqual  1  2  3     Neither seems to work

User · Answer

You can compare an array like the below mentioned if the array has some values

it('should check if the array are equal', function() {
        var mockArr = [1, 2, 3];
        expect(mockArr ).toEqual([1, 2, 3]);
 });

But if the array that is returned from some function has more than 1 elements and all are zero then verify by using

expect(mockArray[0]).toBe(0);

User · Answer

Just did the test and it works with toEqual  please find my test   http   jsfiddle net 7q9N7 3   describe  toEqual   function         it  passes if arrays are equal   function             var arr    1  2  3           expect arr  toEqual  1  2  3                  Just for information      toBe   versus toEqual    toEqual   checks equivalence  toBe    on the   other hand  makes sure that they re the exact same object

User · Answer

I had a similar issue where one of the arrays was modified  I was using it for  httpBackend  and the returned object from that was actually a  promise object containing the array  not an Array object     You can create a jasmine matcher to match the array by creating a toBeArray function   beforeEach function        use strict     this addMatchers       toBeArray  function array          this message   function             return  Expected     angular mock dump this actual      to be array     angular mock dump array                        var arraysAreSame   function x  y             var arraysAreSame   true           for var i  i  lt  x length  i                if x i      y i                  arraysAreSame   false           return arraysAreSame                 return arraysAreSame this actual  array                     And then just use it in your tests like the other jasmine matchers   it  should compare arrays properly   function       var array1  array2                  expect array1 0   toBe array2 0      expect array1  toBeArray array2

User · Answer

just for the record you can always compare using JSON stringify   const arr    1 2 3   expect JSON stringify arr   toBe JSON stringify  1 2 3     expect JSON stringify arr   toEqual JSON stringify  1 2 3       It s all meter of taste   this will also work for complex literal objects

[javascript] Jasmine.js comparing arrays

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