我试图模拟一个包含2个静态成员A,B和静态方法Utils.SomeMethod的Impl。我最初尝试混合PowerMock和Mockito,但不确定这是否导致问题,所以我将所有参考改为PowerMockito。我得到单元测试失败,没有调用模拟。如果我删除静态并只使用Mockito,那么所有测试都会成功。
以下是该问题的简要概述。
class Impl {
static A a;
static B b;
private static final String s = Utils.SomeMethod();
void mainMethod() {
a.aMethod("foo");
b.bMethod("bar");
}
}
所以在我的单元测试中我有
@PowerMockIgnore({"javax.net.ssl.*" , "javax.crypto.*"})
@RunWith(PowerMockRunner.class)
@PrepareForTest({Utils.class})
public class ImplTest {
A a;
B b;
@Captor
ArgumentCaptor<String> argumentCaptor;
@BeforeClass
static public void setUp() {
PowerMockito.mockStatic(Utils.class);
PowerMockito.when(Utils.SomeMethod()).thenReturn("test"); // works
}
@Before
public void before() {
a = PowerMockito.mock(A.class);
b = PowerMockito.mock(B.class);
impl = PowerMockito.mock(Impl.class);
impl.setA(a); // I tried @Mock and @InjectMocks but seemed to not work on statics, works with non static members
impl.setB(b);
}
@Test
public void test() {
PowerMockito.when(a
.aMethod(any(String.class))
.thenReturn("hmm");
PowerMockito.when(b.bMethod(any(String.class))
.thenReturn("yo");
impl.mainMethod();
verify(a, times(1)).aMethod(argumentCaptor.capture());
// fails that 0 times mock was invoked
}
}
我可以看到你正在嘲笑Impl
,但如果你想让mainMethod调用你的静态方法你应该实例化它。另外,您是否在代码中的某处初始化argumentCaptor?
我想建议在大多数测试模拟中使用Mockito,并仅在处理一些静态方法时使用PowerMockito。稍作修改,您的测试代码就可以了:
@RunWith(PowerMockRunner.class)
@PrepareForTest({ Utils.class })
public class ImplTest {
@Mock
A a;
@Mock
B b;
@Captor
ArgumentCaptor<String> argumentCaptor;
@BeforeClass
static public void setUp() {
PowerMockito.mockStatic(Utils.class);
Mockito.when(Utils.SomeMethod()).thenReturn("test"); // works
}
Impl impl;
@Before
public void before() {
Impl.setA(a);
Impl.setB(b);
impl = new Impl();
}
@Test
public void test() {
Mockito
.when(a.aMethod(Matchers.any(String.class)))
.thenReturn("hmmm");
Mockito
.when(b.bMethod(Matchers.any(String.class)))
.thenReturn("yo");
impl.mainMethod();
Mockito.verify(a, Mockito.times(1)).aMethod(argumentCaptor.capture());
Assert.assertEquals("foo", argumentCaptor.getValue());
Mockito.verify(b, Mockito.times(1)).bMethod(argumentCaptor.capture());
Assert.assertEquals("bar", argumentCaptor.getValue());
}
}
请注意,如果A和B被定义为静态,则应将它们注入到类中,而不是注入单个实例中。
@InjectMocks
不会在这种情况下工作,因为它需要一个不同的Runner。请看看这篇文章Difference between @Mock and @InjectMocks