带有 mockito 2 的 NullPointerException

Question

I get java.lang.NullPointerException with this following code:

@Mock
SomeClass retObj;

when(obj.getXXXX(anyString())).thenReturn(retObj);
// obj.getXXXX(null) shows null in other methods

It used to work fine in Mockito 1.

Answer 1

I have fixed it. It turns out Mockito 2.0 handles null differently. When you setup mock as

when(obj.getXXXX(anyString())).thenReturn(retObj);

But actually the call is obj.getXXXX(null) it does not return retObj . Instead it returns null . Hope this helps.