public void when_called()
            {
                before = () => { _parser = Parser.DefaultParser; };

                act = () => { _result = _parser.Parse <BasicOptionsEnumerableParameter>(_args); };

                context["Given a valid command line for Basic Options"] = () =>
                {
                    const string    fileName1 = @"C:\Temp\MyFileName1.txt";
                    const string    fileName2 = @"C:\Temp\MyFileName1.txt";
                    const string    fileName3 = @"C:\Temp\MyFileName1.txt";
                    const int       lineCount = 25;
                    var             dateTime  = new DateTime(2018, 08, 11);
                    const OneToFive oneToFive = OneToFive.Four;

                    before = () =>
                    {
                        _args = new[]
                        {
                            fileName1,
                            fileName2,
                            fileName3,
                            "-lc", lineCount.ToString(),
                            "-dt", dateTime.ToString("yyyy-MM-dd"),
                            "-otf", oneToFive.ToString()
                        };
                    };

                    it["should return a valid result"] = () => _result.ShouldNotBeNull();

                    it["should return an Options instance"] = () => _result.Options.ShouldNotBeNull();

                    it["should map FileNames correctly"]    = () => _result.Options.FileNames.Count.ShouldBe(3);
                    it["should map FileName1 correctly"]    = () => _result.Options.FileNames[0].ShouldBe(fileName1);
                    it["should map FileName2 correctly"]    = () => _result.Options.FileNames[1].ShouldBe(fileName2);
                    it["should map FileName3 correctly"]    = () => _result.Options.FileNames[2].ShouldBe(fileName3);
                    it["should map LineCount correctly"]    = () => _result.Options.LineCount.ShouldBe(lineCount);
                    it["should return Timestamp correctly"] = () => _result.Options.Timestamp.ShouldBe(dateTime);
                    it["should return OneToFive correctly"] = () => _result.Options.OneToFive.ShouldBe(OneToFive.Four);
                };
            }