How to get original class name from a mocking object?

Question

Book aBook = mock(Book.class);

when I write to execute

aBook.getClass() it gives

classcom.tw.model.Book$$EnhancerByMockitoWithCGLIB$$feb29207

But I want : classcom.tw.model.Book

`aBook.getClass().getSuperclass()` (or one of the classes in `.getInterfaces()`, if the mocked class is an interface). — Andy Turner, Sep 13 '17 at 07:24
But why do you actually need to know such information? By and large, if you need to know the actual class of an instance, your design has have problems. — Andy Turner, Sep 13 '17 at 07:25
when(aBook.getClass()).thenReturn(aBook.getClass().getSuperclass()); I tried this but got error — Srinivas, Sep 13 '17 at 08:39
Search for "stub final method java" if you really want to go that route instead of @Absurd-Mind's suggestion. (https://stackoverflow.com/questions/3793791/final-method-mocking) — Henrik Aasted Sørensen, Sep 13 '17 at 08:44
Maybe trying with [PowerMock](https://stackoverflow.com/questions/21092935/use-mockito-to-stub-final-method)? — Alberto S., Sep 13 '17 at 09:08

score 2 · Answer 1 · edited Jun 20 '20 at 09:12

2

Since Mockito 2.1.0 you can use getMockCreationSettings() to get details on what was mocked. from the docs

Added the possibility to access the mock creation settings via

Mockito.mockingDetails(mock).getMockCreationSettings()

Here's an example:

@Test
public void aTest() {
    Foo mock = Mockito.mock(Foo.class);

    MockCreationSettings<?> mockCreationSettings = Mockito.mockingDetails(mock).getMockCreationSettings();

    Assert.assertEquals(Foo.class, mockCreationSettings.getTypeToMock());
}

edited Jun 20 '20 at 09:12

Community

1
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answered Sep 13 '17 at 09:11

glytching

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From the comments I assumed OP is calling getClass inside the method under test. This approach doesn't satisfy OPs problem then. – Absurd-Mind Sep 13 '17 at 09:31
The OP didn't clarify **where** he wants to call `aBook.getClass()` so I don't think it is clear yet (to me, at least :) exactly where/when/how he wants to get the original type for his mock, if he wants to get it _within_ the test case then this answer will work but if he needs to get it inside the system-under-test then it won't. – glytching Sep 13 '17 at 09:34
yes, you are right, I have added an answer for the other case ;) – Absurd-Mind Sep 13 '17 at 09:37

score 1 · Answer 2 · answered Sep 13 '17 at 09:37

Use instanceof instead of getClass()

void methodUnderTest(Object object) {
    if (object instanceof Book) {
        Book book = (Book) object;
        // read the book
    }
}

this can now easily be tested with a mock:

@Test
public void bookTest() {
    methodUnderTest(mock(Book.class));
}

How to get original class name from a mocking object?

2 Answers2