public void ObservableExpressionCallsTest()
{
CallsTestElement element = new CallsTestElement();
element.Value = 1;
Assert.AreEqual(0, element.ValueGetterCallsCount);
Assert.AreEqual(1, element.ValueSetterCallsCount);
ObservableExpression observer = new ObservableExpression(element, "Value");
Assert.AreEqual(1, element.ValueGetterCallsCount);
Assert.AreEqual(1, element.ValueSetterCallsCount);
Assert.AreEqual(1, observer.Value);
Assert.IsTrue(observer.TrySetValue(2));
Assert.AreEqual(2, element.ValueGetterCallsCount);
Assert.AreEqual(2, element.ValueSetterCallsCount);
Assert.AreEqual(2, observer.Value);
Assert.IsTrue(observer.TrySetValue(2));
Assert.AreEqual(2, element.ValueGetterCallsCount);
Assert.AreEqual(2, element.ValueSetterCallsCount);
Assert.AreEqual(2, observer.Value);
Assert.IsTrue(observer.TrySetValue(3));
Assert.AreEqual(3, element.ValueGetterCallsCount);
Assert.AreEqual(3, element.ValueSetterCallsCount);
Assert.AreEqual(3, observer.Value);
}
public void ObservableExpressionDependencyPropertyTest()
{
DependencyObjectNode child1 = new DependencyObjectNode {
Value_ClrWrapper = 1
};
DependencyObjectNode child2 = new DependencyObjectNode {
Value_ClrWrapper = 2
};
DependencyObjectNode root = new DependencyObjectNode {
Value_ClrWrapper = 0
};
int valueChangedCount = 0;
ObservableExpression observableExpression = new ObservableExpression(root, "Child.Value");
observableExpression.ValueChanged += (sender, e) => valueChangedCount++;
Assert.AreEqual(ObservableValue.UnsetValue, observableExpression.Value);
root.Child_ClrWrapper = child1;
Assert.AreEqual(1, observableExpression.Value);
Assert.AreEqual(1, valueChangedCount);
child1.Value_ClrWrapper = 2;
Assert.AreEqual(2, observableExpression.Value);
Assert.AreEqual(2, valueChangedCount);
root.Child_ClrWrapper = child2;
Assert.AreEqual(2, observableExpression.Value);
Assert.AreEqual(2, valueChangedCount);
child1.Value_ClrWrapper = 3;
Assert.AreEqual(2, observableExpression.Value);
Assert.AreEqual(2, valueChangedCount);
child2.Value_ClrWrapper = 3;
Assert.AreEqual(3, observableExpression.Value);
Assert.AreEqual(3, valueChangedCount);
Assert.AreEqual(true, observableExpression.TrySetValue(4));
Assert.AreEqual(3, child1.Value_ClrWrapper);
Assert.AreEqual(4, child2.Value_ClrWrapper);
Assert.AreEqual(4, valueChangedCount);
root.Child_ClrWrapper = null;
Assert.AreEqual(ObservableValue.UnsetValue, observableExpression.Value);
Assert.AreEqual(5, valueChangedCount);
observableExpression.Dispose();
root.Child_ClrWrapper = child1;
Assert.AreEqual(5, valueChangedCount);
}
public void ObservableExpressionClrPropertyTest()
{
ObservableNode child1 = new ObservableNode {
Value = 1
};
ObservableNode child2 = new ObservableNode {
Value = 2
};
ObservableNode root = new ObservableNode {
Value = 0
};
int valueChangedCount = 0;
ObservableExpression observableExpression = new ObservableExpression(root, "Child.Value");
observableExpression.ValueChanged += (sender, oldValue, newValue) => valueChangedCount++;
Assert.AreEqual(ObservableValue.UnsetValue, observableExpression.Value);
root.Child = child1;
Assert.AreEqual(1, observableExpression.Value);
Assert.AreEqual(1, valueChangedCount);
child1.Value = 2;
Assert.AreEqual(2, observableExpression.Value);
Assert.AreEqual(2, valueChangedCount);
root.Child = child2;
Assert.AreEqual(2, observableExpression.Value);
Assert.AreEqual(2, valueChangedCount);
child1.Value = 3;
Assert.AreEqual(2, observableExpression.Value);
Assert.AreEqual(2, valueChangedCount);
child2.Value = 3;
Assert.AreEqual(3, observableExpression.Value);
Assert.AreEqual(3, valueChangedCount);
Assert.AreEqual(true, observableExpression.TrySetValue(4));
Assert.AreEqual(3, child1.Value);
Assert.AreEqual(4, child2.Value);
Assert.AreEqual(4, valueChangedCount);
root.Child = null;
Assert.AreEqual(ObservableValue.UnsetValue, observableExpression.Value);
Assert.AreEqual(5, valueChangedCount);
observableExpression.Dispose();
root.Child = child1;
Assert.AreEqual(5, valueChangedCount);
}
