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@ -60,6 +60,80 @@ namespace Avalonia.Markup.UnitTests.Data |
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Assert.Equal("baz", source.Foo); |
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} |
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[Fact] |
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public void TwoWay_Binding_Should_Be_Set_Up_GC_Collect() |
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{ |
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var source = new WeakRefSource { Foo = null }; |
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var target = new TestControl { DataContext = source }; |
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var binding = new Binding |
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{ |
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Path = "Foo", |
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Mode = BindingMode.TwoWay |
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}; |
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target.Bind(TestControl.ValueProperty, binding); |
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var ref1 = AssignValue(target, "ref1"); |
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Assert.Equal(ref1.Target, source.Foo); |
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GC.Collect(); |
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GC.WaitForPendingFinalizers(); |
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var ref2 = AssignValue(target, "ref2"); |
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GC.Collect(); |
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GC.WaitForPendingFinalizers(); |
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target.Value = null; |
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Assert.Null(source.Foo); |
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} |
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private class DummyObject : ICloneable |
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{ |
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private readonly string _val; |
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public DummyObject(string val) |
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{ |
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_val = val; |
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} |
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public object Clone() |
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{ |
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return new DummyObject(_val); |
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} |
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protected bool Equals(DummyObject other) |
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{ |
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return string.Equals(_val, other._val); |
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} |
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public override bool Equals(object obj) |
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{ |
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if (ReferenceEquals(null, obj)) return false; |
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if (ReferenceEquals(this, obj)) return true; |
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if (obj.GetType() != this.GetType()) return false; |
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return Equals((DummyObject) obj); |
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} |
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public override int GetHashCode() |
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{ |
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return (_val != null ? _val.GetHashCode() : 0); |
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} |
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} |
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[MethodImpl(MethodImplOptions.NoInlining)] |
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private WeakReference AssignValue(TestControl source, string val) |
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{ |
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var obj = new DummyObject(val); |
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source.Value = obj; |
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return new WeakReference(obj); |
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} |
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[Fact] |
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public void OneTime_Binding_Should_Be_Set_Up() |
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{ |
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@ -568,12 +642,70 @@ namespace Avalonia.Markup.UnitTests.Data |
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} |
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} |
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public class WeakRefSource : INotifyPropertyChanged |
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{ |
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private WeakReference<object> _foo; |
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public object Foo |
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{ |
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get |
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{ |
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if (_foo == null) |
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{ |
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return null; |
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} |
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if (_foo.TryGetTarget(out object target)) |
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{ |
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if (target is ICloneable cloneable) |
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{ |
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return cloneable.Clone(); |
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} |
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return target; |
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} |
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return null; |
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} |
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set |
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{ |
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_foo = new WeakReference<object>(value); |
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RaisePropertyChanged(); |
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} |
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} |
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public event PropertyChangedEventHandler PropertyChanged; |
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private void RaisePropertyChanged([CallerMemberName] string prop = "") |
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{ |
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PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(prop)); |
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} |
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} |
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private class OldDataContextViewModel |
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{ |
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public int Foo { get; set; } = 1; |
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public int Bar { get; set; } = 2; |
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} |
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private class TestControl : Control |
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{ |
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public static readonly DirectProperty<TestControl, object> ValueProperty = |
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AvaloniaProperty.RegisterDirect<TestControl, object>( |
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nameof(Value), |
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o => o.Value, |
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(o, v) => o.Value = v); |
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private object _value; |
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public object Value |
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{ |
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get => _value; |
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set => SetAndRaise(ValueProperty, ref _value, value); |
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} |
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} |
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private class OldDataContextTest : Control |
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{ |
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public static readonly StyledProperty<int> FooProperty = |
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Steven Kirk
7 years ago
GitHub