public void Write_Create_ANewFile_When_Using_IncrementFileExtension_Option([Range(1, 101)] int i) { // Arrange var testFile = new FileObject($"{TestFile.FilePathOnly}incrementTest"); testFile.CreateOrTruncate(false); var newFileName = $"{testFile.FilePathOnly}{testFile.FileNameOnlyNoExtension}.{i}"; // Act testFile.Write($"File #{i}", FileOption.IncrementFileExtensionIfExist, Encoding.ASCII); // Assert Assert.That(FileExists(newFileName), Is.True); }