public void DirectoryCreatedSuccessfully()
{
// Arrange
var directoryProvider = new DirectoryProvider();
string newFolder = Path.Combine(Path.GetTempPath(), Guid.NewGuid().ToString());
// Act
directoryProvider.CreateDirectory(newFolder);
// Assert
Assert.That(Directory.Exists(newFolder), Is.True);
// Clean-up
Directory.Delete(newFolder);
}