Nikita Tsukanov
9 years ago
committed by
GitHub
GitHub
16 changed files with 315 additions and 165 deletions
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using System; |
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using System.Collections.Generic; |
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using System.ComponentModel; |
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using System.Runtime.CompilerServices; |
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using JetBrains.Annotations; |
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namespace Avalonia.Diagnostics.ViewModels |
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{ |
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public class ViewModelBase : INotifyPropertyChanged |
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{ |
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public event PropertyChangedEventHandler PropertyChanged; |
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[NotifyPropertyChangedInvocator] |
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protected bool RaiseAndSetIfChanged<T>(ref T field, T value, [CallerMemberName] string propertyName = null) |
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{ |
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if (!EqualityComparer<T>.Default.Equals(field, value)) |
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{ |
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field = value; |
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PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(propertyName)); |
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return true; |
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} |
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return false; |
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} |
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[NotifyPropertyChangedInvocator] |
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protected void RaisePropertyChanged([CallerMemberName] string propertyName = null) |
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{ |
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PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(propertyName)); |
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} |
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} |
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} |
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@ -0,0 +1,30 @@ |
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using System; |
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using System.ComponentModel; |
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using System.Reactive.Linq; |
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using System.Reflection; |
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namespace Avalonia.Diagnostics.Views |
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{ |
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internal static class PropertyChangedExtenions |
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{ |
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public static IObservable<T> GetObservable<T>(this INotifyPropertyChanged source, string propertyName) |
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{ |
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Contract.Requires<ArgumentNullException>(source != null); |
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Contract.Requires<ArgumentNullException>(propertyName != null); |
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var property = source.GetType().GetTypeInfo().GetDeclaredProperty(propertyName); |
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if (property == null) |
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{ |
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throw new ArgumentException($"Property '{propertyName}' not found on '{source}."); |
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} |
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return Observable.FromEventPattern<PropertyChangedEventHandler, PropertyChangedEventArgs>( |
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e => source.PropertyChanged += e, |
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e => source.PropertyChanged -= e) |
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.Where(e => e.EventArgs.PropertyName == propertyName) |
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.Select(_ => (T)property.GetValue(source)) |
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.StartWith((T)property.GetValue(source)); |
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} |
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} |
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} |
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@ -0,0 +1,134 @@ |
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using System; |
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using System.Linq; |
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using Avalonia.Collections; |
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using Xunit; |
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namespace Avalonia.Base.UnitTests.Collections |
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{ |
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public class AvaloniaListExtenionsTests |
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{ |
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[Fact] |
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public void CreateDerivedList_Creates_Initial_Items() |
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{ |
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var source = new AvaloniaList<int>(new[] { 0, 1, 2, 3 }); |
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var target = source.CreateDerivedList(x => new Wrapper(x)); |
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var result = target.Select(x => x.Value).ToList(); |
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Assert.Equal(source, result); |
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} |
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[Fact] |
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public void CreateDerivedList_Handles_Add() |
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{ |
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var source = new AvaloniaList<int>(new[] { 0, 1, 2, 3 }); |
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var target = source.CreateDerivedList(x => new Wrapper(x)); |
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source.Add(4); |
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var result = target.Select(x => x.Value).ToList(); |
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Assert.Equal(source, result); |
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} |
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[Fact] |
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public void CreateDerivedList_Handles_Insert() |
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{ |
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var source = new AvaloniaList<int>(new[] { 0, 1, 2, 3 }); |
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var target = source.CreateDerivedList(x => new Wrapper(x)); |
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source.Insert(1, 4); |
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var result = target.Select(x => x.Value).ToList(); |
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Assert.Equal(source, result); |
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} |
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[Fact] |
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public void CreateDerivedList_Handles_Remove() |
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{ |
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var source = new AvaloniaList<int>(new[] { 0, 1, 2, 3 }); |
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var target = source.CreateDerivedList(x => new Wrapper(x)); |
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source.Remove(2); |
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var result = target.Select(x => x.Value).ToList(); |
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Assert.Equal(source, result); |
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} |
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[Fact] |
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public void CreateDerivedList_Handles_RemoveRange() |
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{ |
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var source = new AvaloniaList<int>(new[] { 0, 1, 2, 3 }); |
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var target = source.CreateDerivedList(x => new Wrapper(x)); |
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source.RemoveRange(1, 2); |
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var result = target.Select(x => x.Value).ToList(); |
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Assert.Equal(source, result); |
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} |
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[Fact] |
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public void CreateDerivedList_Handles_Move() |
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{ |
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var source = new AvaloniaList<int>(new[] { 0, 1, 2, 3 }); |
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var target = source.CreateDerivedList(x => new Wrapper(x)); |
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source.Move(2, 0); |
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var result = target.Select(x => x.Value).ToList(); |
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Assert.Equal(source, result); |
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} |
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[Fact] |
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public void CreateDerivedList_Handles_MoveRange() |
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{ |
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var source = new AvaloniaList<int>(new[] { 0, 1, 2, 3 }); |
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var target = source.CreateDerivedList(x => new Wrapper(x)); |
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source.MoveRange(1, 2, 0); |
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var result = target.Select(x => x.Value).ToList(); |
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Assert.Equal(source, result); |
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} |
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[Fact] |
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public void CreateDerivedList_Handles_Replace() |
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{ |
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var source = new AvaloniaList<int>(new[] { 0, 1, 2, 3 }); |
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var target = source.CreateDerivedList(x => new Wrapper(x)); |
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source[1] = 4; |
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var result = target.Select(x => x.Value).ToList(); |
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Assert.Equal(source, result); |
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} |
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[Fact] |
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public void CreateDerivedList_Handles_Clear() |
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{ |
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var source = new AvaloniaList<int>(new[] { 0, 1, 2, 3 }); |
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var target = source.CreateDerivedList(x => new Wrapper(x)); |
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source.Clear(); |
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var result = target.Select(x => x.Value).ToList(); |
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Assert.Equal(source, result); |
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} |
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private class Wrapper |
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{ |
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public Wrapper(int value) |
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{ |
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Value = value; |
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} |
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public int Value { get; } |
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} |
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} |
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} |
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