public void ShouldRollbackFileCopy()
        {
            // Given
            var command = new CopyCommand (FilePath, DestinyFilePath);
            command.Execute ();

            // When
            command.Rollback ();

            // Then
            Assert.IsTrue (File.Exists (FilePath));
            Assert.IsFalse (File.Exists (DestinyFilePath));
        }