public void ConfigParser_CreateDefault_CreatesMessageFactoryFromFile() { var sut = ConfigParser.CreateDefault(_pathToConfigXmlIncludingFilename); var msgType0100 = int.Parse("100", NumberStyles.HexNumber); var header100 = sut.GetIsoHeader(msgType0100); header100.Should().Be("ISO015000050", "because we expect the config file to be read and parsed"); }