public void Should_throw_ArgumentNullException_when_converting_string_to_bytes_and_argument_is_null()
 {
     Assert.Throws <ArgumentException>(() => BytesService.StringToBytes(null));
 }
 public void Should_return_byte_array_from_string_correctly()
 {
     Assert.Equal(new byte[4] {
         116, 101, 115, 116
     }, BytesService.StringToBytes("test"));
 }