public void TextWritingSystems_IdIsNotText_ReturnsEmpty() { var ws = WritingSystemDefinition.Parse("en"); ws.IsVoice = true; RepositoryUnderTest.Set(ws); var wsIdsToFilter = new List <string> { ws.Id }; var textIds = new List <string> (RepositoryUnderTest.FilterForTextIds(wsIdsToFilter)); Assert.IsEmpty(textIds); }