public async Task UpdateOutputFilesDoesNotGenerateWarningWhenDefaultOutputFileIsEmpty() // Because there may be nothing developer can do about it { await UIThreadDispatcher.Invoke <Task>(async delegate { this.output.File = string.Empty; this.output.Content.Clear(); this.output.Content.Append(WhiteSpaceText); this.provider.UpdateOutputFiles(this.input.FileNames[1], new[] { this.output }); await this.SimulateCustomTool(); Assert.IsFalse(ErrorItems.Any(item => item.FileName == this.input.FileNames[1])); }); }