// #2 Batch get on association resource
methodDescriptor = followsAssociationResourceModel.findMethod(ResourceMethod.BATCH_GET);
followsResource = getMockResource(AsyncFollowsAssociativeResource.class);
Set<CompoundKey> expectedKeys = new HashSet<CompoundKey>();
CompoundKey key1 = new CompoundKey();
key1.append("followeeID", 1L);
key1.append("followerID", 1L);
expectedKeys.add(key1);
CompoundKey key2 = new CompoundKey();
key2.append("followeeID", 2L);
key2.append("followerID", 2L);
expectedKeys.add(key2);
followsResource.batchGet((Set<CompoundKey>) Matchers.eqCollectionUnordered(expectedKeys),
(Callback<Map<CompoundKey, Followed>>) EasyMock.anyObject());
EasyMock.expectLastCall().andAnswer(new IAnswer<Object>() {