public void TestSorting()
{
// Sort ascending
List <ClassForComparing> list = new List <ClassForComparing> {
new ClassForComparing {
ID = 1, StringValue = "abc", IntValue = 1
},
new ClassForComparing {
ID = 2, StringValue = "abc", IntValue = 2
},
new ClassForComparing {
ID = 3, StringValue = "xyz", IntValue = 1
},
new ClassForComparing {
ID = 4, StringValue = "xyz", IntValue = 2
}
};
// all ascending
list.Sort(new GenericComparer <ClassForComparing>(x => x.StringValue, x => x.IntValue));
this.CheckListOrder(list, 1, 2, 3, 4);
// one aspect descending, the other ascending
list.Sort(new GenericComparer <ClassForComparing>(x => OrderedComparable.Desc(x.StringValue), x => x.IntValue));
this.CheckListOrder(list, 3, 4, 1, 2);
// All descending
list.Sort(new GenericComparer <ClassForComparing>(x => OrderedComparable.Desc(x.StringValue), x => OrderedComparable.Desc(x.IntValue)));
this.CheckListOrder(list, 4, 3, 2, 1);
}
public void TestCompare()
{
// Sort ascending
ClassForComparing a = new ClassForComparing {
ID = 1, StringValue = "abc", IntValue = 1
};
ClassForComparing b = new ClassForComparing {
ID = 2, StringValue = "abc", IntValue = 2
};
ClassForComparing c = new ClassForComparing {
ID = 3, StringValue = "xyz", IntValue = 1
};
// Comparing 'a' to 'b' by string ascending, Should be a == b
int ret = a.CompareToByAspects(b, x => x.StringValue);
Assert.AreEqual(ret, 0);
// Comparing 'a' to 'c' by string ascending, Should be a < c
ret = a.CompareToByAspects(c, x => x.StringValue);
Assert.AreEqual(ret, -1);
// Comparing 'a' to 'c' by string descending, Should be a > c
ret = a.CompareToByAspects(c, x => OrderedComparable.Desc(x.StringValue));
Assert.AreEqual(ret, 1);
// Comparing 'a' to 'b' by string ascending and then by int ascending, Should be a < b
ret = a.CompareToByAspects(b, x => x.StringValue, x => x.IntValue);
Assert.AreEqual(ret, -1);
// Comparing 'a' to 'b' by string ascending and then by int ascending, Should be a < b (still)
ret = a.CompareToByAspects(b, x => x.StringValue, x => OrderedComparable.Asc(x.IntValue));
Assert.AreEqual(ret, -1);
// Comparing 'a' to 'b' by string ascending and then by int descending, Should be a > b
ret = a.CompareToByAspects(b, x => x.StringValue, x => OrderedComparable.Desc(x.IntValue));
Assert.AreEqual(ret, 1);
}
