120 lines
3.5 KiB
C#
120 lines
3.5 KiB
C#
// Licensed to the .NET Foundation under one or more agreements.
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// The .NET Foundation licenses this file to you under the MIT license.
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// See the LICENSE file in the project root for more information.
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using System.ComponentModel;
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using CommunityToolkit.Mvvm.ComponentModel;
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using Microsoft.VisualStudio.TestTools.UnitTesting;
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namespace CommunityToolkit.Mvvm.UnitTests;
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[TestClass]
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public partial class Test_ObservableObjectAttribute
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{
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[TestMethod]
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public void Test_ObservableObjectAttribute_Events()
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{
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Assert.IsTrue(typeof(INotifyPropertyChanged).IsAssignableFrom(typeof(SampleModel)));
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Assert.IsTrue(typeof(INotifyPropertyChanging).IsAssignableFrom(typeof(SampleModel)));
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SampleModel? model = new();
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(PropertyChangingEventArgs, int) changing = default;
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(PropertyChangedEventArgs, int) changed = default;
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model.PropertyChanging += (s, e) =>
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{
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Assert.IsNull(changing.Item1);
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Assert.IsNull(changed.Item1);
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Assert.AreSame(model, s);
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Assert.IsNotNull(s);
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Assert.IsNotNull(e);
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changing = (e, model.Data);
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};
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model.PropertyChanged += (s, e) =>
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{
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Assert.IsNotNull(changing.Item1);
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Assert.IsNull(changed.Item1);
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Assert.AreSame(model, s);
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Assert.IsNotNull(s);
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Assert.IsNotNull(e);
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changed = (e, model.Data);
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};
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model.Data = 42;
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Assert.AreEqual(changing.Item1?.PropertyName, nameof(SampleModel.Data));
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Assert.AreEqual(changing.Item2, 0);
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Assert.AreEqual(changed.Item1?.PropertyName, nameof(SampleModel.Data));
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Assert.AreEqual(changed.Item2, 42);
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}
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[TestMethod]
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public void Test_ObservableObjectAttribute_OnSealedClass_Events()
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{
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Assert.IsTrue(typeof(INotifyPropertyChanged).IsAssignableFrom(typeof(SampleModelSealed)));
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Assert.IsTrue(typeof(INotifyPropertyChanging).IsAssignableFrom(typeof(SampleModelSealed)));
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SampleModelSealed? model = new();
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(PropertyChangingEventArgs, int) changing = default;
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(PropertyChangedEventArgs, int) changed = default;
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model.PropertyChanging += (s, e) =>
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{
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Assert.IsNull(changing.Item1);
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Assert.IsNull(changed.Item1);
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Assert.AreSame(model, s);
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Assert.IsNotNull(s);
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Assert.IsNotNull(e);
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changing = (e, model.Data);
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};
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model.PropertyChanged += (s, e) =>
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{
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Assert.IsNotNull(changing.Item1);
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Assert.IsNull(changed.Item1);
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Assert.AreSame(model, s);
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Assert.IsNotNull(s);
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Assert.IsNotNull(e);
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changed = (e, model.Data);
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};
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model.Data = 42;
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Assert.AreEqual(changing.Item1?.PropertyName, nameof(SampleModelSealed.Data));
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Assert.AreEqual(changing.Item2, 0);
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Assert.AreEqual(changed.Item1?.PropertyName, nameof(SampleModelSealed.Data));
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Assert.AreEqual(changed.Item2, 42);
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}
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[ObservableObject]
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public partial class SampleModel
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{
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private int data;
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public int Data
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{
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get => this.data;
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set => SetProperty(ref this.data, value);
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}
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}
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[ObservableObject]
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public sealed partial class SampleModelSealed
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{
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private int data;
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public int Data
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{
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get => this.data;
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set => SetProperty(ref this.data, value);
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}
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}
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}
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