public void SourceRemoveItemWithFilteringAndSorting()
{
var items = new ObservableCollection <TestModel>()
{
new TestModel("Beryle Blackbourn", 20),
new TestModel("Andrei Epps", 9),
new TestModel("Chelsey MacCaig", 47),
new TestModel("Dotty Andreopolos", 9),
new TestModel("Jemmie Chesshire", 36),
};
var cvs = new Rotorsoft.Forms.CollectionViewSource();
cvs.Source = items;
cvs.Filter = (item) => (item as TestModel).Score > 15;
cvs.SortDescriptions = new ObservableCollection <SortDescription>()
{
new SortDescription(nameof(TestModel.Score), ListSortDirection.Descending),
};
items.RemoveAt(2);
Assert.Equal(2, cvs.View.Count());
Assert.Equal("Jemmie Chesshire", cvs.View.GetItemAt <TestModel>(0).Name);
Assert.Equal("Beryle Blackbourn", cvs.View.GetItemAt <TestModel>(1).Name);
}
public void Constructor()
{
var cvs = new Rotorsoft.Forms.CollectionViewSource();
Assert.Null(cvs.Source);
Assert.Null(cvs.View);
Assert.Null(cvs.Filter);
Assert.Empty(cvs.SortDescriptions);
}
public void SortDescriptionsAddWithEnumerable()
{
var items = new TestEnumerable(new TestModel[0]);
var cvs = new Rotorsoft.Forms.CollectionViewSource();
cvs.Source = items;
cvs.SortDescriptions = new ObservableCollection <SortDescription>();
Assert.Throws <InvalidOperationException>(() => cvs.SortDescriptions.Add(new SortDescription(nameof(TestModel.Name), ListSortDirection.Ascending)));
}
public void SourceWithNonEmptyList()
{
var items = new List <object>()
{
"Lorem Ipsum"
};
var cvs = new Rotorsoft.Forms.CollectionViewSource();
cvs.Source = items;
Assert.Same(items, cvs.Source);
Assert.NotNull(cvs.View);
Assert.NotEmpty(cvs.View);
}
public void SourceWithNonEmptyEnumerable()
{
var items = new TestEnumerable(new object[]
{
"Lorem Ipsum"
});
var cvs = new Rotorsoft.Forms.CollectionViewSource();
cvs.Source = items;
Assert.Same(items, cvs.Source);
Assert.NotNull(cvs.View);
Assert.NotEmpty(cvs.View);
}
public void SourceWithEmptyList()
{
var cvs = new Rotorsoft.Forms.CollectionViewSource();
cvs.Source = new List <object>();
Assert.NotNull(cvs.Source);
Assert.Empty(cvs.Source);
Assert.NotNull(cvs.View);
Assert.Empty(cvs.View);
Assert.True(cvs.View.CanFilter);
Assert.True(cvs.View.CanSort);
Assert.False(cvs.View.CanGroup);
}
public void SortDescriptionsAddSingleDescending()
{
var items = new List <TestModel>()
{
new TestModel("Beryle Blackbourn", 20),
new TestModel("Andrei Epps", 9),
new TestModel("Chelsey MacCaig", 47),
new TestModel("Dotty Andreopolos", 9),
new TestModel("Jemmie Chesshire", 36),
};
var cvs = new Rotorsoft.Forms.CollectionViewSource();
cvs.Source = items;
cvs.SortDescriptions = new ObservableCollection <SortDescription>();
cvs.SortDescriptions.Add(new SortDescription(nameof(TestModel.Score), ListSortDirection.Descending));
Assert.Equal(47, cvs.View.GetItemAt <TestModel>(0).Score);
Assert.Equal(9, cvs.View.GetItemAt <TestModel>(4).Score);
}
public void FilterWithEnumerable()
{
var items = new TestEnumerable(new object[]
{
10,
"Lorem Ipsum",
TimeSpan.Zero,
});
Predicate <object> filterPredicate = (item) => item is string;
var cvs = new Rotorsoft.Forms.CollectionViewSource();
cvs.Source = items;
cvs.Filter = filterPredicate;
Assert.Same(filterPredicate, cvs.Filter);
Assert.NotNull(cvs.View);
Assert.NotEmpty(cvs.View);
Assert.Equal(1, cvs.View.Count());
}
public void RemoveFilter()
{
var items = new List <object>()
{
10,
"Lorem Ipsum",
TimeSpan.Zero,
};
Predicate <object> filterPredicate = (item) => item is string;
var cvs = new Rotorsoft.Forms.CollectionViewSource();
cvs.Source = items;
cvs.Filter = filterPredicate;
Assert.Equal(1, cvs.View.Count());
cvs.Filter = null;
Assert.Equal(3, cvs.View.Count());
}