java - 方法调用计数断言

Question

我刚刚开始使用 PowerMock 和 EasyMock，我对模拟方法调用的计数方式有些困惑。

示例代码:

class ClassToBeTested{
 private boolean toBeMocked(Integer i){
  return i%2==1; 
  }
 }

和测试代码:

@RunWith(PowerMockRunner.class)
@PrepareForTest(ClassToBeTested.class)
public class ClassToBeTestedTest{

 private final Integer i=2;
 ClassToBeTested underTest;

 @Before
 public void setUp() throws Exception {
  underTest=PowerMock.createPartialMock(ClassToBeTested.class,
                    "toBeMocked");
  PowerMock.expectPrivate(underTest, "toBeMocked", i)
            .andReturn(true);
  PowerMock.replay(underTest);
 }
 @Test
 public dummyTest(){
  Assert.assertTrue(underTest.toBeMocked(i);
  //the call is: underTest.toBeMocked(2)
  //so the computation is return 2%2==1; google says it 0 :)
  //thus real method would return 0==1 (false)
  //mocked one will return true, assertion should pass, that's ok
  //RERUN ASSERTION
  Assert.assertTrue(underTest.toBeMocked(i);
  //method invocation count should be now 2
}

  @After
  public void tearDown() {
   PowerMock.verify(underTest);
   //WILL FAIL with exception saying
   //the mocked method has not been called at all
   //expected value (obvious) is one
}

我的问题是，为什么模拟方法调用预期会失败？ 为什么验证 ClassUnderTest 会显示根本没有调用模拟方法？

Answer 1

它对我有用，在将期望行更改为:

 PowerMock.expectPrivate(underTest, "toBeMocked", i).andReturn(true).times(2);

即使没有那个变化，也不能说被 mock 的母亲没有被召唤。它说

  Unexpected method call toBeMocked(2):
    toBeMocked(2): expected: 1, actual: 2

您使用的是最新的 PowerMock 和 EasyMock 版本吗？