我有一个Wrapper类导致而不是equals方法,在包装对象上调用equalsWithoutId方法。在这里实施:
import org.apache.commons.lang3.Validate;
public class IdAgnosticWrapper {
private final IdAgnostic wrapped;
public IdAgnosticWrapper(IdAgnostic wrapped) {
Validate.notNull(wrapped, "wrapped must not be null");
this.wrapped = wrapped;
}
@Override
public int hashCode() {
return wrapped.hashCodeWithoutId();
}
@Override
public boolean equals(Object obj) {
if (!(obj instanceof IdAgnosticWrapper)) {
return false;
}
return wrapped.equalsWithoutId(((IdAgnosticWrapper) obj).getWrapped());
}
public IdAgnostic getWrapped() {
return wrapped;
}
}
IdAgnostic是一个简单的界面,可确保存在所需的方法
public interface IdAgnostic {
int hashCodeWithoutId();
boolean equalsWithoutId(Object o);
}
然后我有一些应该测试的单元测试,如果equals()委托给包装的#equalsWithoutId()方法,hashCode()委托给包装的#hashCodeWithoutId。
现在我尝试通过这些测试来测试它
import org.mockito.InjectMocks;
import org.mockito.Mock;
import org.mockito.MockitoAnnotations;
import org.testng.annotations.BeforeMethod;
import org.testng.annotations.Test;
import static org.mockito.Mockito.verify;
public class IdAgnosticWrapperTest {
@Mock
private IdAgnostic wrappedMock;
@InjectMocks
private IdAgnosticWrapper tested;
@BeforeMethod
public void setUp() throws Exception {
MockitoAnnotations.initMocks(this);
}
@Test
public void testEquals_EqualsWithoutIdIsCalledOnWrapped() throws Exception {
tested.equals(tested);
verify(wrappedMock).equalsWithoutId(tested.getWrapped());
}
@Test
public void testHashCode_HashCodeWithoutIdIsCalledOnWrapped() throws Exception {
tested.hashCode();
verify(wrappedMock).hashCodeWithoutId(); //line 34
}
}
正如你所看到的,我只是创建包装模拟和测试,无论equals和hashcode是否委托了这些功能。
如果我单独运行测试,一切正常,但如果我按顺序运行两个测试,第二个测试将失败并显示此消息
Wanted but not invoked:
wrappedMock.hashCodeWithoutId();
-> at com.my.app.utils.IdAgnosticWrapperTest.testHashCode_HashCodeWithoutIdIsCalledOnWrapped(IdAgnosticWrapperTest.java:34)
Actually, there were zero interactions with this mock.
为什么会这样?
答案 0 :(得分:1)
实际上,这里发生的是@InjectMocks
无法正确注入构造函数参数wrapped
。根据{{3}},这是当前的行为。因此,除非您想使用setter注入,否则您需要删除@InjectMocks
注释。请参阅修订后的代码:
public class IdAgnosticWrapperTest {
@Mock
private IdAgnostic wrappedMock;
private IdAgnosticWrapper tested;
@BeforeMethod
public void setUp() throws Exception {
MockitoAnnotations.initMocks(this);
this.tested = new IdAgnosticWrapper(this.wrappedMock);
}
@Test
public void testEquals_EqualsWithoutIdIsCalledOnWrapped()
throws Exception {
tested.equals(tested);
verify(wrappedMock).equalsWithoutId(tested.getWrapped());
}
@Test
public void testHashCode_HashCodeWithoutIdIsCalledOnWrapped()
throws Exception {
tested.hashCode();
verify(wrappedMock).hashCodeWithoutId(); //line 34
}
}
当我运行上面的代码时,两个测试按顺序一起运行并传递。