Question

I’m trying to setup mocks for mongodb in my java code, and I’m getting the following exception:

org.mockito.exceptions.misusing.WrongTypeOfReturnValue:
DBCursor$$EnhancerByMockitoWithCGLIB$$fc4f0e22 cannot be returned by getOptions()
getOptions() should return int

The line of code that generates this is:

when(col.find(query)).thenReturn(cursor);

Where col is a mocked DBCollection, query is a mocked DBObject, and cursor is a mocked DBCursor.

I’ve found the following very vague but probably relevant problem description:

http://osdir.com/ml/mongodb-user/2010-08/msg02102.html

Answer 1

Just found the issue, the find(DBObject obj) method is final in DBCollection:

http://grepcode.com/file/repo1.maven.org/maven2/org.mongodb/mongo-java-driver/2.1/com/mongodb/DBCollection.java

PowerMock ultimately solved my issue since it allows mocking final methods.