doAnswer 的作用和 Mockito 使用then、thenAnswer 自定义方法处理逻辑相同,但使用方式不同:
import org.junit.Assert;
import org.junit.Test;
import org.mockito.MockitoAnnotations;
import org.mockito.invocation.InvocationOnMock;
import org.mockito.stubbing.Answer;
import java.util.Random;
import static org.mockito.Mockito.*;
public class MockitoDemo {
@Test
public void test() {
MockitoAnnotations.initMocks(this);
Random random = mock(Random.class);
doAnswer(new Answer() {
@Override
public Object answer(InvocationOnMock invocation) throws Throwable {
return 1;
}
}).when(random).nextInt();
Assert.assertEquals(1, random.nextInt());
}
}