Is it possible to do strict mocks with Mockito?

Question

I\'d like to use strict mocks, at least when developing for the first time some tests against old code, so any methods invoked on my mock will throw an exception if I didn\'t sp

Answer 1

Add this @Rule to your test class as a public field:

@RunWith(JUnitParamsRunner.class)
public class MyClassTests {

    @Rule
    public MockitoRule mockito = MockitoJUnit.rule().strictness(Strictness.STRICT_STUBS);

    @Test
    ....
}

This value was added to Mockito in version 2.3.0

From the documentation:

Ensures clean tests, reduces test code duplication, improves debuggability. Offers best combination of flexibility and productivity. Highly recommended. Planned as default for Mockito v3. Adds following behavior:

• Improved productivity: the test fails early when code under test invokes stubbed method with different arguments (see PotentialStubbingProblem).
• Cleaner tests without unnecessary stubbings: the test fails when unused stubs are present (see UnnecessaryStubbingException).
• Cleaner, more DRY tests ("Don't Repeat Yourself"): If you use Mockito.verifyNoMoreInteractions(Object...) you no longer need to explicitly verify stubbed invocations. They are automatically verified for you.