After updating our project to Aspose.Cells 5.1.1 one of our unittests fail. This specific test is expected to throw an exception when a Word document is passed to Aspose.Cells.
Please find attached the Word document.
The code opens the file in the ctor like so; var x = new Workbook(filename); but does not throw an exception. Inspecting the Worksheet collections reveals 0 sheets.