public void ShouldNotifyComparerChange()
{
CategoryItem category = new CategoryItem(new PropertyGrid(), new CategoryAttribute());
int numberRaised = 0;
category.PropertyChanged += (sender, e) => { if (e.PropertyName == "Comparer")
{
numberRaised++;
}
};
PropertyItemComparer comparer = new PropertyItemComparer();
category.Comparer = comparer;
category.Comparer = comparer;
Assert.AreEqual(comparer, category.Comparer);
Assert.AreEqual <int>(1, numberRaised);
}
public void ComparesOrderedItems()
{
PropertyItemComparer comparer = new PropertyItemComparer();
int result = comparer.Compare(new PropertyItemMock(0), new PropertyItemMock(0));
Assert.AreEqual <int>(0, result);
result = comparer.Compare(new PropertyItemMock(0), new PropertyItemMock(1));
Assert.AreEqual <int>(-1, result);
result = comparer.Compare(new PropertyItemMock(1), new PropertyItemMock(0));
Assert.AreEqual <int>(1, result);
result = comparer.Compare(new PropertyItemMock("a"), new PropertyItemMock("a"));
Assert.AreEqual <int>(0, result);
result = comparer.Compare(new PropertyItemMock("a"), new PropertyItemMock("b"));
Assert.AreEqual <int>(-1, result);
result = comparer.Compare(new PropertyItemMock("b"), new PropertyItemMock("a"));
Assert.AreEqual <int>(1, result);
}
public void ComparesNullToValue()
{
int result = new PropertyItemComparer().Compare(null, new PropertyItemMock(null));
Assert.AreEqual <int>(-1, result);
}
public void ComparesValueToNull()
{
int result = new PropertyItemComparer().Compare(new PropertyItemMock(null), null);
Assert.AreEqual <int>(1, result);
}
public void ComparesNullToNull()
{
int result = new PropertyItemComparer().Compare(null, null);
Assert.AreEqual <int>(0, result);
}
