Using Mockito, how do I test a 'finite loop' with a boolean condition?

Question

Using Mockito, how do I test a \'finite loop\' ?

I have a method I want to test that looks like this:

public void dismissSearchAreaSuggestions()
{
           


        

Answer 1

As long as you make all of your stubs a part of the same chain, Mockito will proceed through them in sequence, always repeating the final call.

// returns false, false, true, true, true...
when(your.mockedCall(param))'
    .thenReturn(Boolean.FALSE, Boolean.FALSE, Boolean.TRUE);

You can also do so with this syntax...

// returns false, false, true, true, true...
when(your.mockedCall(param))
    .thenReturn(Boolean.FALSE)
    .thenReturn(Boolean.FALSE)
    .thenReturn(Boolean.TRUE);

...which can come in handy if the actions aren't all return values.

// returns false, false, true, then throws an exception
when(your.mockedCall(param))
    .thenReturn(Boolean.FALSE)
    .thenReturn(Boolean.FALSE)
    .thenReturn(Boolean.TRUE)
    .thenThrow(new Exception("Called too many times!"));

If you want things to get more complex than that, consider writing an Answer.