Mockito.any() 用于<T>

Question

I want to mock a method with signature as:

public <T> T documentToPojo(Document mongoDoc, Class<T> clazz)

I mock it as below:

Mockito.when(mongoUtil.documentToPojo(Mockito.any(Document.class), Mockito.any(WorkItemDTO.class)))

But I get error as:

The method documentToPojo(Document, Class<T>) in the type MongoUtil is not applicable for the arguments (Document, WorkItemDTO)

Is there any method in Mockito which will help me mock for T?

Answer 1

Note that documentToPojo takes a Class as its second argument. any(Foo.class) returns an argument of type Foo , not of type Class<Foo> , whereas eq(WorkItemDTO.class) should return a Class<WorkItemDTO> as expected. I'd do it this way:

when(mongoUtil.documentToPojo(
    Mockito.any(Document.class),
    Mockito.eq(WorkItemDTO.class))).thenReturn(...);

Answer 2

You can match a generic Class<T> argument using simply any( Class.class ) , eg.:

Mockito.when( mongoUtil.documentToPojo( Mockito.any( Document.class ),
                                        Mockito.any( Class.class ) ) );

Cheers,

Answer 3

You can do it using ArgumentMatchers.any() qualified with the type, like so:

Mockito.when(
    mongoUtil.documentToPojo(
        Mockito.any(Document.class),
        ArgumentMatchers.<Class<WorkItemDTO>>any()
    )
).thenReturn(...);