public void FromIndexTest()
{
Assert.AreEqual(null, WeekDay.FromIndex(null));
int?val = 0;
Assert.AreEqual(0, WeekDay.FromIndex(val).Index);
var day = WeekDay.FromIndex(0);
Assert.AreEqual(0, day.Index);
Assert.AreEqual(DayOfWeek.Sunday, day.Value);
Assert.AreEqual(true, day.IsWeekEnd);
Assert.AreEqual(true, day == Week.Sunday);
Assert.AreEqual("Sun", day.GetShortName());
Assert.AreEqual("So", day.GetShortName(CultureInfo.GetCultureInfo("de")));
Assert.AreEqual("Sunday", day.GetName());
Assert.AreEqual("Sonntag", day.GetName(CultureInfo.GetCultureInfo("de")));
day = WeekDay.FromIndex(1);
Assert.AreEqual(1, day.Index);
Assert.AreEqual(DayOfWeek.Monday, day.Value);
Assert.AreEqual(false, day.IsWeekEnd);
Assert.AreEqual(true, day == Week.Monday);
Assert.AreEqual("Mon", day.GetShortName());
Assert.AreEqual("Mo", day.GetShortName(CultureInfo.GetCultureInfo("de")));
Assert.AreEqual("Monday", day.GetName());
Assert.AreEqual("Montag", day.GetName(CultureInfo.GetCultureInfo("de")));
day = WeekDay.FromIndex(2);
Assert.AreEqual(2, day.Index);
Assert.AreEqual(DayOfWeek.Tuesday, day.Value);
Assert.AreEqual(false, day.IsWeekEnd);
Assert.AreEqual(true, day == Week.Tuesday);
Assert.AreEqual("Tue", day.GetShortName());
Assert.AreEqual("Di", day.GetShortName(CultureInfo.GetCultureInfo("de")));
Assert.AreEqual("Tuesday", day.GetName());
Assert.AreEqual("Dienstag", day.GetName(CultureInfo.GetCultureInfo("de")));
day = WeekDay.FromIndex(3);
Assert.AreEqual(3, day.Index);
Assert.AreEqual(DayOfWeek.Wednesday, day.Value);
Assert.AreEqual(false, day.IsWeekEnd);
Assert.AreEqual(true, day == Week.Wednesday);
Assert.AreEqual("Wed", day.GetShortName());
Assert.AreEqual("Mi", day.GetShortName(CultureInfo.GetCultureInfo("de")));
Assert.AreEqual("Wednesday", day.GetName());
Assert.AreEqual("Mittwoch", day.GetName(CultureInfo.GetCultureInfo("de")));
day = WeekDay.FromIndex(4);
Assert.AreEqual(4, day.Index);
Assert.AreEqual(DayOfWeek.Thursday, day.Value);
Assert.AreEqual(false, day.IsWeekEnd);
Assert.AreEqual(true, day == Week.Thursday);
Assert.AreEqual("Thu", day.GetShortName());
Assert.AreEqual("Do", day.GetShortName(CultureInfo.GetCultureInfo("de")));
Assert.AreEqual("Thursday", day.GetName());
Assert.AreEqual("Donnerstag", day.GetName(CultureInfo.GetCultureInfo("de")));
day = WeekDay.FromIndex(5);
Assert.AreEqual(5, day.Index);
Assert.AreEqual(DayOfWeek.Friday, day.Value);
Assert.AreEqual(false, day.IsWeekEnd);
Assert.AreEqual(true, day == Week.Friday);
Assert.IsTrue(Week.Friday.Equals(day));
Assert.IsTrue(Week.Monday != day);
Assert.AreEqual("Fri", day.GetShortName());
Assert.AreEqual("Fr", day.GetShortName(CultureInfo.GetCultureInfo("de")));
Assert.AreEqual("Friday", day.GetName());
Assert.AreEqual("Freitag", day.GetName(CultureInfo.GetCultureInfo("de")));
day = WeekDay.FromIndex(6);
Assert.AreEqual(6, day.Index);
Assert.AreEqual(DayOfWeek.Saturday, day.Value);
Assert.AreEqual(true, day.IsWeekEnd);
Assert.AreEqual(true, day == Week.Saturday);
Assert.AreEqual("Sat", day.GetShortName());
Assert.AreEqual("Sa", day.GetShortName(CultureInfo.GetCultureInfo("de")));
Assert.AreEqual("Saturday", day.GetName());
Assert.AreEqual("Samstag", day.GetName(CultureInfo.GetCultureInfo("de")));
day = WeekDay.FromIndex(7);
Assert.IsNull(day);
day = WeekDay.FromEnglishName("Sunday");
Assert.AreEqual(0, day.Index);
day = WeekDay.FromEnglishName("Monday");
Assert.AreEqual(1, day.Index);
day = WeekDay.FromEnglishName("Tuesday");
Assert.AreEqual(2, day.Index);
day = WeekDay.FromEnglishName("Wednesday");
Assert.AreEqual(3, day.Index);
day = WeekDay.FromEnglishName("Thursday");
Assert.AreEqual(4, day.Index);
day = WeekDay.FromEnglishName("Friday");
Assert.AreEqual(5, day.Index);
day = WeekDay.FromEnglishName("Saturday");
Assert.AreEqual(6, day.Index);
day = WeekDay.FromEnglishName("em");
Assert.IsNull(day);
day = WeekDay.FromShortEnglishName("Sun");
Assert.AreEqual(0, day.Index);
day = WeekDay.FromShortEnglishName("Mon");
Assert.AreEqual(1, day.Index);
day = WeekDay.FromShortEnglishName("Tue");
Assert.AreEqual(2, day.Index);
day = WeekDay.FromShortEnglishName("Wed");
Assert.AreEqual(3, day.Index);
day = WeekDay.FromShortEnglishName("Thu");
Assert.AreEqual(4, day.Index);
day = WeekDay.FromShortEnglishName("Fri");
Assert.AreEqual(5, day.Index);
day = WeekDay.FromShortEnglishName("Sat");
Assert.AreEqual(6, day.Index);
Assert.AreEqual(6, day.GetHashCode());
day = WeekDay.FromShortEnglishName("em");
Assert.IsNull(day);
day = WeekDay.FromDateTime((DateTime?)new DateTime(2018, 1, 7));
Assert.AreEqual(0, day.Index);
day = WeekDay.FromDateTime((DateTime?)new DateTime(2018, 1, 8));
Assert.AreEqual(1, day.Index);
day = WeekDay.FromDateTime((DateTime?)new DateTime(2018, 1, 9));
Assert.AreEqual(2, day.Index);
day = WeekDay.FromDateTime((DateTime?)new DateTime(2018, 1, 10));
Assert.AreEqual(3, day.Index);
day = WeekDay.FromDateTime((DateTime?)new DateTime(2018, 1, 11));
Assert.AreEqual(4, day.Index);
day = WeekDay.FromDateTime((DateTime?)new DateTime(2018, 1, 12));
Assert.AreEqual(5, day.Index);
day = WeekDay.FromDateTime((DateTime?)new DateTime(2018, 1, 13));
Assert.AreEqual(6, day.Index);
day = WeekDay.FromDateTime(null);
Assert.IsNull(day);
day = WeekDay.FromShortEnglishName("Sat");
Assert.IsTrue(day > null);
Assert.IsFalse(null > day);
Assert.IsFalse(day < null);
Assert.IsTrue(null < day);
day = null;
Assert.IsFalse(null > day);
Assert.IsFalse(day < null);
day = WeekDay.FromIndex(6);
Assert.IsTrue(Week.Thursday < day);
Assert.IsFalse(Week.Thursday > day);
}