public void ThenByDescendingNullKey()
{
Country england, france, china, india, unknown;
Data <Country> data = Data
(
england = new Country()
{
Name = "England", Continent = "Europe"
},
france = new Country()
{
Name = "France", Continent = "Europe"
},
china = new Country()
{
Name = "China", Continent = "Asia"
},
india = new Country()
{
Name = "India", Continent = "Asia"
},
unknown = new Country()
{
Name = "Unknown", Continent = null
}
);
IOrderedEnumerable <Country> orderedData = data.OrderBy(x => true).ThenByDescending(x => x.Continent);
orderedData.AssertSame(england, france, china, india, unknown);
}
public void ThenByWithComparerNullKey()
{
Country england, france, china, india, unknown;
Data <Country> data = Data
(
england = new Country()
{
Name = "England", Continent = "Europe"
},
france = new Country()
{
Name = "France", Continent = "Europe"
},
china = new Country()
{
Name = "China", Continent = "Asia"
},
india = new Country()
{
Name = "India", Continent = "Asia"
},
unknown = new Country()
{
Name = "Unknown", Continent = null
}
);
IOrderedEnumerable <Country> orderedData = data.OrderBy(x => true).ThenBy(x => x.Continent, Comparer <string> .Default);
orderedData.AssertSame(unknown, china, india, england, france);
}