+ final Optional<NormalizedNode<?, ?>> optionalMock = mock(Optional.class);
+ when(optionalMock.get()).thenReturn(null);
+ final CheckedFuture<Optional<NormalizedNode<?, ?>>, ReadFailedException> readFuture = Futures
+ .immediateCheckedFuture(optionalMock);
+ when(this.rwTransaction.read(any(LogicalDatastoreType.class), any(YangInstanceIdentifier.class)))
+ .thenReturn(readFuture);