public void Clients_DoNotHaveToCareAboutNulls()
{
var notNull = new ComparisonSubject("a", 1, 1m);
var chainable = new SelectorComparer <ComparisonSubject, int>(s => s.Property2);
Assert.That(chainable.Compare(notNull, null), Is.GreaterThan(0));
Assert.That(chainable.Compare(null, notNull), Is.LessThan(0));
Assert.That(chainable.Compare(null, null), Is.EqualTo(0));
}
public void Compare_ComparedTheSelectedProperty_HonoringDirection()
{
var subject = new SelectorComparer <ComparisonSubject, int>(s => s.Property2, Direction.Ascending);
Assert.That(subject.Compare(ComparisonSubject.One, ComparisonSubject.Two), Is.LessThan(0));
subject = new SelectorComparer <ComparisonSubject, int>(s => s.Property2, Direction.Descending);
Assert.That(subject.Compare(ComparisonSubject.One, ComparisonSubject.Two), Is.GreaterThan(0));
}
public void Comparison_HonorsDirection()
{
Comparison <ComparisonSubject> comparison = new SelectorComparer <ComparisonSubject, int>(
s => s.Property2, Direction.Ascending).Comparison;
Assert.That(comparison(ComparisonSubject.One, ComparisonSubject.Two), Is.LessThan(0));
comparison = new SelectorComparer <ComparisonSubject, int>(
s => s.Property2, Direction.Descending).Comparison;
Assert.That(comparison(ComparisonSubject.One, ComparisonSubject.Two), Is.GreaterThan(0));
}
public void Explore()
{
IComparer <ComparisonSubject> subject = new SelectorComparer <ComparisonSubject, int>(s => s.Property2, Direction.Descending);
Assert.That(subject.Compare(ComparisonSubject.One, ComparisonSubject.Two), Is.GreaterThan(0));
IComparer <ComparisonSubject> by3Then2Desc = new SelectorComparer <ComparisonSubject, decimal>(s => s.Property3)
.Then(s => s.Property2, Direction.Descending);
by3Then2Desc = Cmp <ComparisonSubject> .By(s => s.Property3)
.Then(s => s.Property2, Direction.Descending);
}
public void Ctor_SetsDirection()
{
var subject = new SelectorComparer <ComparisonSubject, int>(s => s.Property2, Direction.Descending);
Assert.That(subject.SortDirection, Is.EqualTo(Direction.Descending));
}
public void Ctor_DefaultsToAscending()
{
var subject = new SelectorComparer <ComparisonSubject, int>(s => s.Property2);
Assert.That(subject.SortDirection, Is.EqualTo(Direction.Ascending));
}
