public void throws_exception_if_selector_is_null()
{
Assert.Throws <ArgumentNullException>(() =>
{
PropertyOrderComparer.For <string>(null);
});
}
public void compare_two_string_by_length()
{
const string string1 = "lorem xyz";
const string string2 = "ipsum";
var comparer = PropertyOrderComparer.For <string>(x => x.Length);
comparer.Compare(string1, string2).ShouldBe(1);
}
public void PropertyOrderComparer_can_be_used_to_order_collection()
{
var string1 = "winter is coming";
var string2 = "abc";
var string3 = "car-auto";
var unordered = Pack.IntoArray(string1, string2, string3);
var ordered = unordered
.OrderBy(x => x, PropertyOrderComparer.For <string>(x => x.Length))
.ToArray();
ordered[0].ShouldBe(string2);
ordered[1].ShouldBe(string3);
ordered[2].ShouldBe(string1);
}
public void compare_two_objects_without_not_implementing_comparable_throws_exception()
{
var obj1 = new CompareTarget
{
Nested = new CompareTarget {
Value = 3
}
};
var obj2 = new CompareTarget
{
Nested = new CompareTarget {
Value = 12
}
};
var comparer = PropertyOrderComparer.For <CompareTarget>(x => x.Nested);
Assert.Throws <ArgumentException>(() => comparer.Compare(obj1, obj2));
}