private Object deepStub(InvocationOnMock invocation, GenericMetadataSupport returnTypeGenericMetadata) throws Throwable { InvocationContainerImpl container = MockUtil.getInvocationContainer(invocation.getMock()); // matches invocation for verification // TODO why don't we do container.findAnswer here? for (Stubbing stubbing : container.getStubbingsDescending()) { if (container.getInvocationForStubbing().matches(stubbing.getInvocation())) { return stubbing.answer(invocation); } } // record deep stub answer StubbedInvocationMatcher stubbing = recordDeepStubAnswer( newDeepStubMock(returnTypeGenericMetadata, invocation.getMock()), container ); // deep stubbing creates a stubbing and immediately uses it // so the stubbing is actually used by the same invocation stubbing.markStubUsed(stubbing.getInvocation()); return stubbing.answer(invocation); }