public void HandleDroppedFiles_ListWithExistingPrintableFiles_PrintFileHelperAddFilesReturnsFalse_PrintAllDoeNotGetCalled()
        {
            _fileWrap.Exists("").ReturnsForAnyArgs(true);
            _directConversion.CanConvertDirectly("").ReturnsForAnyArgs(false);
            _printFileHelper.AddFiles(null).ReturnsForAnyArgs(false);
            _fileConversionHandler.HandleFileList(_droppedFiles);
            Assert.AreEqual(3, _directConversion.ReceivedCalls().Count());

            _printFileHelper.Received(1).AddFiles(Arg.Is <List <string> >(x => x.SequenceEqual(_droppedFiles)));
            _printFileHelper.DidNotReceive().PrintAll();
        }