Mock static methods

Question

I have a static method in a class. the method is not final. I keep getting a when() requires an argument which has to be 'a method call on a mock' error. Below is my code.

mockStatic(HomefeedExperimentUtils.class);

when(HomefeedExperimentUtils.getGroupAndActivateExperiment(
    "link_stock_signal_filter_exp")).thenReturn(
    "treatment");

I've also tried:

HomefeedExperimentUtils mock = org.mockito.Mockito.mock(HomefeedExperimentUtils.class);

when(mock.getGroupAndActivateExperiment(
    "link_stock_signal_filter_exp")).thenReturn(
    "treatment");

Any help with be appreciated.

Thanks!

Don't mock statics. Test public behavior, and if the statics are public, test them directly. — chrylis -cautiouslyoptimistic-, Oct 09 '17 at 19:07
Do not use `static` methods in the first place. They make your code inflexible and hard to reuse (as your problem to use a mock instead shows). And no: there is no rule that utility classes *must* have static methods... — Timothy Truckle, Oct 09 '17 at 19:10

score 0 · Answer 1 · answered Oct 09 '17 at 19:06

0

Mockito is not able perform static mocking, use PowerMock to extend their capability and achieve that.

https://github.com/powermock/powermock/wiki

answered Oct 09 '17 at 19:06

Paulo Ricardo Almeida

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But before you surrender to your bad design by using PowerMock remove the `static` key word from that method under test! – Timothy Truckle Oct 09 '17 at 19:08

Mock static methods

1 Answers1