Verify static methods calls in order

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Mirko Alicastro

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Jan 20, 2022, 4:58:10 PMJan 20
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Hey Mockito team.

I have a question about verifying static methods calls. I am aware of Mockito.inOrder(Object... mocks), but we can't pass a MockedStatic instance. Can we verify that some static methods have been called in a specific order? Here is a minimal, reproducible example:

import org.junit.jupiter.api.Test;
import org.mockito.MockedStatic;
import org.mockito.Mockito;

class StaticContext {
  public static void first() {  }
  public static void second() {  }
}

class ExampleTest {
  @Test
  public void shouldCallStaticMethodsInExpectedOrder() {
    // GIVEN
    try (MockedStatic<StaticContext> mockedStatic = Mockito.mockStatic(StaticContext.class)) {
      // WHEN
      StaticContext.first();
      StaticContext.second();

      // THEN
      mockedStatic.verify(StaticContext::first);
      mockedStatic.verify(StaticContext::second);
    }
  }
}

Dependencies:

org.junit.jupiter:junit-jupiter-engine:5.8.2
org.mockito:mockito-inline:4.2.0

How can we make the test fail if we swap StaticContext.first() with StaticContext.second()? I have tried also using verify with a lambda, i.e.:

mockedStatic.verify(() -> {
  StaticContext.first();
  StaticContext.second();
});

But, again, the order isn't enforced. I would expect to have a way to do it, since we can do it with regular mocks. Otherwise, it would be interesting to implement it.

Please, share your thoughts, thank you! 🙂 

Mirko Alicastro

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Feb 1, 2022, 6:10:49 PMFeb 1
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