122 lines
4.5 KiB
C#
122 lines
4.5 KiB
C#
using FluentAssertions;
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using System;
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using System.Collections.Generic;
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using System.Collections.Specialized;
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using System.Linq;
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using System.Text;
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using System.Threading.Tasks;
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using Xunit;
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namespace ObservableCollections.Tests
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{
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public class ObservableStackTests
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{
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[Fact]
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public void View()
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{
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var stack = new ObservableStack<int>();
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var view = stack.CreateView(x => new ViewContainer<int>(x));
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stack.Push(10);
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stack.Push(50);
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stack.Push(30);
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stack.Push(20);
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stack.Push(40);
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void Equal(params int[] expected)
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{
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stack.Should().Equal(expected);
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view.Select(x => x.Value).Should().Equal(expected);
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view.Select(x => x.View).Should().Equal(expected.Select(x => new ViewContainer<int>(x)));
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}
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Equal(40, 20, 30, 50, 10);
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stack.PushRange(new[] { 1, 2, 3, 4, 5 });
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Equal(5, 4, 3, 2, 1, 40, 20, 30, 50, 10);
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stack.Pop().Should().Be(5);
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Equal(4, 3, 2, 1, 40, 20, 30, 50, 10);
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stack.TryPop(out var q).Should().BeTrue();
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q.Should().Be(4);
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Equal(3, 2, 1, 40, 20, 30, 50, 10);
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stack.PopRange(4);
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Equal(20, 30, 50, 10);
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stack.Clear();
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Equal();
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}
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[Fact]
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public void Filter()
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{
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var stack = new ObservableStack<int>();
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var view = stack.CreateView(x => new ViewContainer<int>(x));
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var filter = new TestFilter<int>((x, v) => x % 3 == 0);
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stack.Push(10);
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stack.Push(50);
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stack.Push(30);
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stack.Push(20);
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stack.Push(40);
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view.AttachFilter(filter);
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filter.CalledWhenTrue.Select(x => x.Item1).Should().Equal(30);
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filter.CalledWhenFalse.Select(x => x.Item1).Should().Equal(40, 20, 50, 10);
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view.Select(x => x.Value).Should().Equal(30);
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filter.Clear();
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stack.Push(33);
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stack.PushRange(new[] { 98 });
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filter.CalledOnCollectionChanged.Select(x => (x.Action, x.NewValue, x.NewViewIndex)).Should().Equal((NotifyCollectionChangedAction.Add, 33, 0), (NotifyCollectionChangedAction.Add, 98, 0));
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filter.Clear();
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stack.Pop();
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stack.PopRange(2);
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filter.CalledOnCollectionChanged.Select(x => (x.Action, x.OldValue, x.OldViewIndex)).Should().Equal((NotifyCollectionChangedAction.Remove, 98, 0), (NotifyCollectionChangedAction.Remove, 33, 0), (NotifyCollectionChangedAction.Remove, 40, 0));
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}
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[Fact]
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public void FilterAndInvokeAddEvent()
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{
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var stack = new ObservableStack<int>();
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var view = stack.CreateView(x => new ViewContainer<int>(x));
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var filter = new TestFilter<int>((x, v) => x % 3 == 0);
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stack.Push(10);
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stack.Push(50);
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stack.Push(30);
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stack.Push(20);
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stack.Push(40);
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view.AttachFilter(filter, true);
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filter.CalledOnCollectionChanged.Count.Should().Be(5);
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filter.CalledOnCollectionChanged[4].Action.Should().Be(NotifyCollectionChangedAction.Add);
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filter.CalledOnCollectionChanged[4].NewValue.Should().Be(10);
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filter.CalledOnCollectionChanged[4].NewViewIndex.Should().Be(0);
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filter.CalledOnCollectionChanged[3].Action.Should().Be(NotifyCollectionChangedAction.Add);
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filter.CalledOnCollectionChanged[3].NewValue.Should().Be(50);
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filter.CalledOnCollectionChanged[3].NewViewIndex.Should().Be(0);
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filter.CalledOnCollectionChanged[2].Action.Should().Be(NotifyCollectionChangedAction.Add);
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filter.CalledOnCollectionChanged[2].NewValue.Should().Be(30);
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filter.CalledOnCollectionChanged[2].NewViewIndex.Should().Be(0);
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filter.CalledOnCollectionChanged[1].Action.Should().Be(NotifyCollectionChangedAction.Add);
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filter.CalledOnCollectionChanged[1].NewValue.Should().Be(20);
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filter.CalledOnCollectionChanged[1].NewViewIndex.Should().Be(0);
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filter.CalledOnCollectionChanged[0].Action.Should().Be(NotifyCollectionChangedAction.Add);
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filter.CalledOnCollectionChanged[0].NewValue.Should().Be(40);
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filter.CalledOnCollectionChanged[0].NewViewIndex.Should().Be(0);
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filter.CalledWhenTrue.Count.Should().Be(1);
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filter.CalledWhenFalse.Count.Should().Be(4);
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}
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}
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}
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