cannot resolve method “when”

问题

I'm following the Vogella tutorial on Mockito and get stuck pretty much immediately. IntelliJ displays cannot resolve method 'when' for the class below.

...what did I miss?

import org.junit.Test;
import org.junit.runner.RunWith;
import org.mockito.Mockito;
import org.mockito.runners.MockitoJUnitRunner;

@RunWith(MockitoJUnitRunner.class)
public class MockitoTest  {

@Test
public void test1()  {
    MyClass test = Mockito.mock(MyClass.class);
    // define return value for method getUniqueId()
    test.when(test.getUniqueId()).thenReturn(43);

    // TODO use mock in test.... 
}

}

回答1:

The method when() is not part of your class MyClass. It's part of the class Mockito:

Mockito.when(test.getUniqueId()).thenReturn(43);

or, with a static import:

import static org.mockito.Mockito.*;

...

when(test.getUniqueId()).thenReturn(43);

回答2:

you are trying to get when from the mocked class. You need to do something like:

...
MyClass test = Mockito.mock(MyClass.class);
Mockito.when(test.getUniqueId()).thenReturn(43);
...

来源：https://stackoverflow.com/questions/25268783/cannot-resolve-method-when