69 lines
2.4 KiB
C#
69 lines
2.4 KiB
C#
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using System.Collections.Generic;
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namespace ObservableCollections.Tests;
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public class SortedViewViewComparerTest
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{
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[Fact]
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public void Sort()
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{
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var list = new ObservableList<int>();
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var sortedView = list.CreateSortedView(
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x => x,
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x => new ViewContainer<int>(x),
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Comparer<ViewContainer<int>>.Default);
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list.Add(10);
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list.Add(50);
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list.Add(30);
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list.Add(20);
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list.Add(40);
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using var e = sortedView.GetEnumerator();
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e.MoveNext().Should().BeTrue();
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e.Current.Value.Should().Be(10);
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e.MoveNext().Should().BeTrue();
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e.Current.Value.Should().Be(20);
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e.MoveNext().Should().BeTrue();
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e.Current.Value.Should().Be(30);
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e.MoveNext().Should().BeTrue();
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e.Current.Value.Should().Be(40);
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e.MoveNext().Should().BeTrue();
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e.Current.Value.Should().Be(50);
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e.MoveNext().Should().BeFalse();
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}
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[Fact]
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public void ObserveIndex()
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{
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var list = new ObservableList<int>();
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var sortedView = list.CreateSortedView(
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x => x,
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x => new ViewContainer<int>(x),
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Comparer<ViewContainer<int>>.Default);
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var filter = new TestFilter<int>((value, view) => value % 2 == 0);
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list.Add(50);
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list.Add(10);
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sortedView.AttachFilter(filter);
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list.Add(20);
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filter.CalledOnCollectionChanged[0].changedKind.Should().Be(ChangedKind.Add);
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filter.CalledOnCollectionChanged[0].value.Should().Be(20);
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filter.CalledOnCollectionChanged[0].index.Should().Be(1);
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list.Remove(20);
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filter.CalledOnCollectionChanged[1].changedKind.Should().Be(ChangedKind.Remove);
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filter.CalledOnCollectionChanged[1].value.Should().Be(20);
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filter.CalledOnCollectionChanged[1].oldIndex.Should().Be(1);
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list[1] = 999; // from 10(at 0 in original) to 999
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filter.CalledOnCollectionChanged[2].changedKind.Should().Be(ChangedKind.Remove);
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filter.CalledOnCollectionChanged[2].value.Should().Be(10);
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filter.CalledOnCollectionChanged[2].oldIndex.Should().Be(0);
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filter.CalledOnCollectionChanged[3].changedKind.Should().Be(ChangedKind.Add);
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filter.CalledOnCollectionChanged[3].value.Should().Be(999);
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filter.CalledOnCollectionChanged[3].index.Should().Be(1);
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}
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}
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