I am spying a JS method. I want to return different things based on actual argument to the method. I tried callFake and tried to access arguments using arguments[0] but it says arguments[0] is undefined. Here is the code -
spyOn(testService, 'testParam').and.callFake(function() { var rValue = {}; if(arguments[0].indexOf("foo") !== -1){ return rValue; } else{ return {1}; } }) This is suggested here - Any way to modify Jasmine spies based on arguments?
But it does not work for me.
Use of arguments should work just fine. Also on a side note could you paste your entire object under test- though that's not the source of the issue.
Here is how I used it. See it in action here
var testObj = { 'sample': "This is a sample string", 'methodUnderTest': function(param) { console.log(param); return param; } }; testObj.methodUnderTest("You'll notice this string on console"); describe('dummy Test Suite', function() { it('test param passed in', function() { spyOn(testObj, 'methodUnderTest').and.callFake(function() { var param = arguments[0]; if (param === 5) { return "five"; } return param; }); var val = testObj.methodUnderTest(5); expect(val).toEqual('five'); var message = "This string is not printed on console"; val = testObj.methodUnderTest(message); expect(val).toEqual(message); }); }); 