public void RemoveShouldRemoveValues()
{
const string Value = "test value";
const string OtherValue = "other value";
var dict = new MultivalueDictionary<int, string>( () => new HashSet<string>() );
dict.Add( 1, Value );
dict.Add( 2, OtherValue );
Assert.Equal( dict.Count, 2 );
Assert.Equal( dict.CountValues( 1 ), 1 );
Assert.Equal( dict.CountValues( 2 ), 1 );
dict.Remove( 1 );
Assert.Equal( dict.Count, 1 );
Assert.Equal( dict.CountValues( 2 ), 1 );
Assert.False( dict.Remove( 2, Value ) );
Assert.True( dict.Remove( 2, OtherValue ) );
}
public void RemoveMethodRaisesEvents()
{
IList<PropertyChangedEventArgs> propertyArgs = new List<PropertyChangedEventArgs>();
NotifyCollectionChangedEventArgs collectionArgs = null;
MultivalueDictionary<string, string> dictionary = new MultivalueDictionary<string, string>();
dictionary.Add( "key", "value1" );
dictionary.Add( "key", "value2" );
dictionary.Add( "other key", "value" );
dictionary.PropertyChanged += ( sender, e ) => propertyArgs.Add( e );
dictionary.CollectionChanged += ( sender, e ) => collectionArgs = e;
// removing an nonexisting item should not raise an event
dictionary.Remove( "made up key" );
Assert.Equal( propertyArgs.Count, 0 );
Assert.Null( collectionArgs );
// reset
propertyArgs.Clear();
collectionArgs = null;
// removing an existing item with a nonexisting value should not raise an event
dictionary.Remove( "key", "made up value" );
Assert.Equal( propertyArgs.Count, 0 );
Assert.Null( collectionArgs );
// reset
propertyArgs.Clear();
collectionArgs = null;
// removing an entire existing collection by key should raise an event
dictionary.Remove( "other key" );
Assert.Equal( propertyArgs.Count, 2 );
Assert.Equal( propertyArgs[0].PropertyName, "Count" );
Assert.Equal( propertyArgs[1].PropertyName, "Item[]" );
Assert.NotNull( collectionArgs );
Assert.Equal( collectionArgs.Action, NotifyCollectionChangedAction.Remove );
Assert.Null( collectionArgs.NewItems );
Assert.Equal( collectionArgs.NewStartingIndex, -1 );
Assert.NotNull( collectionArgs.OldItems );
Assert.Equal( 1, collectionArgs.OldItems.Count );
Assert.True( AreEquivalent( collectionArgs.OldItems[0], "other key", "value" ) );
Assert.Equal( collectionArgs.OldStartingIndex, 1 );
// reset
propertyArgs.Clear();
collectionArgs = null;
// removing an existing item with an existing value should raise an event
dictionary.Remove( "key", "value1" );
Assert.Equal( propertyArgs.Count, 1 );
Assert.NotNull( collectionArgs );
Assert.Equal( collectionArgs.Action, NotifyCollectionChangedAction.Replace );
Assert.NotNull( collectionArgs.NewItems );
Assert.Equal( 1, collectionArgs.NewItems.Count );
Assert.True( AreEquivalent( collectionArgs.NewItems[0], "key", "value2" ) );
Assert.Equal( collectionArgs.NewStartingIndex, 0 );
Assert.NotNull( collectionArgs.OldItems );
Assert.Equal( 1, collectionArgs.OldItems.Count );
Assert.True( AreEquivalent( collectionArgs.OldItems[0], "key", "value1", "value2" ) );
Assert.Equal( collectionArgs.OldStartingIndex, 0 );
// reset
propertyArgs.Clear();
collectionArgs = null;
// removing an existing item with for the last existing value should raise an event
dictionary.Remove( "key", "value2" );
Assert.Equal( propertyArgs.Count, 3 );
Assert.Equal( propertyArgs[0].PropertyName, "Item[]" );
Assert.Equal( propertyArgs[1].PropertyName, "Count" );
Assert.Equal( propertyArgs[2].PropertyName, "Item[]" );
Assert.NotNull( collectionArgs );
Assert.Equal( collectionArgs.Action, NotifyCollectionChangedAction.Remove );
Assert.Null( collectionArgs.NewItems );
Assert.Equal( collectionArgs.NewStartingIndex, -1 );
Assert.NotNull( collectionArgs.OldItems );
Assert.Equal( 1, collectionArgs.OldItems.Count );
Assert.True( AreEquivalent( collectionArgs.OldItems[0], "key", new string[0] ) );
Assert.Equal( collectionArgs.OldStartingIndex, 0 );
}
public void ShouldRemoveKeyWhenLastItemInValueIsRemoved()
{
const string Value = "test value";
var dict = new MultivalueDictionary<int, string>();
dict.Add( 1, Value );
Assert.Equal( dict.Count, 1 );
Assert.Equal( dict[1].Count, 1 );
dict.Remove( 1, Value );
Assert.Equal( dict.Count, 0 );
}
