public void Can_add()
{
var hashSet = new ObservableHashSet <string>();
var countChanging = 0;
var countChanged = 0;
var collectionChanged = 0;
var currentCount = 0;
var countChange = 1;
var adding = Array.Empty <string>();
hashSet.PropertyChanging += (s, a) => AssertCountChanging(hashSet, s, a, currentCount, ref countChanging);
hashSet.PropertyChanged += (s, a) => AssertCountChanged(hashSet, s, a, ref currentCount, countChange, ref countChanged);
hashSet.CollectionChanged += (s, a) =>
{
Assert.Equal(NotifyCollectionChangedAction.Add, a.Action);
Assert.Null(a.OldItems);
Assert.Equal(adding, a.NewItems.OfType <string>());
collectionChanged++;
};
adding = new[] { "Palmer" };
Assert.True(hashSet.Add("Palmer"));
Assert.Equal(1, countChanging);
Assert.Equal(1, countChanged);
Assert.Equal(1, collectionChanged);
Assert.Equal(new[] { "Palmer" }, hashSet);
adding = new[] { "Carmack" };
Assert.True(hashSet.Add("Carmack"));
Assert.Equal(2, countChanging);
Assert.Equal(2, countChanged);
Assert.Equal(2, collectionChanged);
Assert.Equal(new[] { "Carmack", "Palmer" }, hashSet.OrderBy(i => i));
Assert.False(hashSet.Add("Palmer"));
Assert.Equal(2, countChanging);
Assert.Equal(2, countChanged);
Assert.Equal(2, collectionChanged);
Assert.Equal(new[] { "Carmack", "Palmer" }, hashSet.OrderBy(i => i));
}
public void Can_symmetrical_except_with()
{
var hashSet = new ObservableHashSet <string>
{
"Brendan",
"Carmack",
"Nate",
"Palmer"
};
var countChanging = 0;
var countChanged = 0;
var collectionChanged = 0;
var currentCount = 4;
var countChange = -1;
var removing = new[] { "Carmack", "Palmer" };
var adding = new[] { "Abrash" };
hashSet.PropertyChanging += (s, a) => AssertCountChanging(hashSet, s, a, currentCount, ref countChanging);
hashSet.PropertyChanged += (s, a) => AssertCountChanged(hashSet, s, a, ref currentCount, countChange, ref countChanged);
hashSet.CollectionChanged += (s, a) =>
{
Assert.Equal(NotifyCollectionChangedAction.Replace, a.Action);
Assert.Equal(removing, a.OldItems.OfType <string>().OrderBy(i => i));
Assert.Equal(adding, a.NewItems.OfType <string>().OrderBy(i => i));
collectionChanged++;
};
hashSet.SymmetricExceptWith(new[] { "Carmack", "Palmer", "Abrash" });
Assert.Equal(1, countChanging);
Assert.Equal(1, countChanged);
Assert.Equal(1, collectionChanged);
Assert.Equal(new[] { "Abrash", "Brendan", "Nate" }, hashSet.OrderBy(i => i));
hashSet.SymmetricExceptWith(Array.Empty <string>());
Assert.Equal(1, countChanging);
Assert.Equal(1, countChanged);
Assert.Equal(1, collectionChanged);
Assert.Equal(new[] { "Abrash", "Brendan", "Nate" }, hashSet.OrderBy(i => i));
}
public void Can_remove_with_predicate()
{
var hashSet = new ObservableHashSet <string>
{
"Brendan",
"Carmack",
"Nate",
"Palmer"
};
var countChanging = 0;
var countChanged = 0;
var collectionChanged = 0;
var currentCount = 4;
var countChange = -2;
var removing = new[] { "Carmack", "Palmer" };
hashSet.PropertyChanging += (s, a) => AssertCountChanging(hashSet, s, a, currentCount, ref countChanging);
hashSet.PropertyChanged += (s, a) => AssertCountChanged(hashSet, s, a, ref currentCount, countChange, ref countChanged);
hashSet.CollectionChanged += (s, a) =>
{
Assert.Equal(NotifyCollectionChangedAction.Replace, a.Action);
Assert.Equal(removing, a.OldItems.OfType <string>().OrderBy(i => i));
Assert.Empty(a.NewItems);
collectionChanged++;
};
Assert.Equal(2, hashSet.RemoveWhere(i => i.Contains("m")));
Assert.Equal(1, countChanging);
Assert.Equal(1, countChanged);
Assert.Equal(1, collectionChanged);
Assert.Equal(new[] { "Brendan", "Nate" }, hashSet.OrderBy(i => i));
Assert.Equal(0, hashSet.RemoveWhere(i => i.Contains("m")));
Assert.Equal(1, countChanging);
Assert.Equal(1, countChanged);
Assert.Equal(1, collectionChanged);
Assert.Equal(new[] { "Brendan", "Nate" }, hashSet.OrderBy(i => i));
}
public void Can_union_with()
{
var hashSet = new ObservableHashSet <string>
{
"Palmer",
"Carmack"
};
var countChanging = 0;
var countChanged = 0;
var collectionChanged = 0;
var currentCount = 2;
var countChange = 2;
var adding = new[] { "Brendan", "Nate" };
hashSet.PropertyChanging += (s, a) => AssertCountChanging(hashSet, s, a, currentCount, ref countChanging);
hashSet.PropertyChanged += (s, a) => AssertCountChanged(hashSet, s, a, ref currentCount, countChange, ref countChanged);
hashSet.CollectionChanged += (s, a) =>
{
Assert.Equal(NotifyCollectionChangedAction.Replace, a.Action);
Assert.Empty(a.OldItems);
Assert.Equal(adding, a.NewItems.OfType <string>().OrderBy(i => i));
collectionChanged++;
};
hashSet.UnionWith(new[] { "Carmack", "Nate", "Brendan" });
Assert.Equal(1, countChanging);
Assert.Equal(1, countChanged);
Assert.Equal(1, collectionChanged);
Assert.Equal(new[] { "Brendan", "Carmack", "Nate", "Palmer" }, hashSet.OrderBy(i => i));
hashSet.UnionWith(new[] { "Brendan" });
Assert.Equal(1, countChanging);
Assert.Equal(1, countChanged);
Assert.Equal(1, collectionChanged);
Assert.Equal(new[] { "Brendan", "Carmack", "Nate", "Palmer" }, hashSet.OrderBy(i => i));
}