public void Should_Get_single_file()
 {
     File.WriteAllText("a.abc", "123");
     var dir = new DirectoryImpl();
     var files = dir.GetFilesInCurrentDirectory("*.abc");
     Assert.That(files.Count, Is.EqualTo(1));
     File.Delete("a.abc");
 }
 public void Should_Get_zero_files()
 {
     var dir = new DirectoryImpl();
     var files = dir.GetFilesInCurrentDirectory("*.xyz");
     Assert.That(files.Count, Is.EqualTo(0));
 }