Question

I’am using Mockolate and flex unit 4 to write mocks for my tests in AS3. I want to call the same method on a mock with the same arguments multiple
times and return a different result each time. A basic example is:

            [Rule] 
            public var mocks:MockolateRule = new MockolateRule(); 

            [Mock(type="strict")] 
            public var list:IList; 

            [Test] 
            public function test():void{ 

                    var seq:Sequence = sequence(); 
                    expecting(function ():void { 
                            expect(list.getItemAt(0)).returns("Item1").thrice().inSequence(seq); 
                            expect(list.getItemAt(0)).returns("Item2").inSequence(seq); 
                            expect(list.getItemAt(0)).returns("Item3").inSequence(seq); 
                    }); 

                    trace(list.getItemAt(0)); 
                    trace(list.getItemAt(0)); 
                    trace(list.getItemAt(0)); 

                    verify(list); 
            } 

This results in:

Item1 
Item2 
Item2 

And and error:

1 unmet Exception

What I want is

Item1 
Item2 
Item2 

and no exceptions, i.e. test passes.

I’ve tried a few alternatives such as:

                    expecting(function ():void { 
                            expect(list.getItemAt(0)).returns("Item1").inSequence(seq); 
                            expect(list.getItemAt(0)).returns("Item2").inSequence(seq); 
                            expect(list.getItemAt(0)).returns("Item3").inSequence(seq); 
                    }); 

and others to no avail. Surely I’m missing something simple here. This
seems like something that should be easy.

Thanks guys,

Theo.

Answer 1

This bugged the hell out of me, until I found out it is really very simple: Just use all the expected return values as parameters to the first returns() statement.

 expect(list.getItemAt(0)).returns("Item1", "Item2", "Item3", "Item4").inSequence(seq); 

The mock will return the last of these parameters for each subsequent call.