JMockit - Expectations MockUp<T>为什么一个可以工作，另一个不能？

Question

我正在尝试(仍然)学习JMockit的细节。这是另一个JMockit奇怪的例子，我就是搞不懂。使用NonStrictExpectations运行测试效果很好。但是，使用MockUp运行则不会。我不知道为什么。有什么想法吗？我运行的是JMockit 1.5。

测试方法：

private List<Foo> getFooList(List<FooStatement> fooStatements){
    List<Foo> FooList = new ArrayList<Foo>();

    for(FooStatement at: fooStatements){
        List<Foo> aList = at.getFoos();
        FooList.addAll(aList);
    }

    return FooList;
}

成功的期望测试

@Test
public void getFooListWithExpectationsTest(
        @Mocked final FooStatement mockFooStatement,
        @Mocked final Foo mockFoo
){

    List<FooStatement> fooStatementList = new ArrayList<>(Arrays.asList(
            mockFooStatement,
            mockFooStatement
    ));

    new NonStrictExpectations(){{
        mockFooStatement.getFoos();
        result = new ArrayList<Foo>(Arrays.asList(mockFoo));
    }};

    List<Foo> fooList = Deencapsulation.invoke(handler, "getFooList", fooStatementList);
    Assert.assertTrue(fooList.size() == 2);
}

MockUp的断言错误(0 != 2)

@Test
public void getFooListWithMockUpTest(
        @Mocked final FooStatement mockFooStatement,
        @Mocked final Foo mockFoo
){

    new MockUp<FooStatement>(){
        @Mock
        public List<Foo> getFoos(){
            return new ArrayList<Foo>(Arrays.asList(mockFoo));
        }
    };

    List<FooStatement> fooStatementList = new ArrayList<>(Arrays.asList(
            mockFooStatement,
            mockFooStatement
    ));

    List<Foo> fooList = Deencapsulation.invoke(handler, "getFooList", fooStatementList);
    Assert.assertTrue(fooList.size() == 2);
}

Answer 1

您错误地使用了MockUp<?>。MockUp<T?将告诉JMockit重新定义加载到JVM中的类，以便用MockUp<FooStatement中定义的类替换它们，而不是FooStatement的实际类初始化。

基本上，MockUp<FooStatement> new FooStatement()**.**的调用会自动替换MockUp<FooStatement>的调用

尝试如下所示：

@Test
public void getFooListWithMockUpTest(@Mocked final Foo mockFoo){

    new MockUp<FooStatement>(){
        @Mock
        public List<Foo> getFoos(){
            return new ArrayList<Foo>(Arrays.asList(mockFoo));
        }
    };

    List<FooStatement> fooStatementList = new ArrayList<>(Arrays.asList(
            new FooStatement(),
            new FooStatement()
    ));

    List<Foo> fooList = Deencapsulation.invoke(handler, "getFooList",     fooStatementList);
    Assert.assertTrue(fooList.size() == 2);
}

Answer 2

MockUp已弃用，请使用Expectations