public void When_Path_Has_Null_Intermediary_Node_Then_Skips_When_Invalid_Path()
{
// Arrange
var childOne = new TestObservableObject {Age = 5};
var childTwo = new TestObservableObject {Age = 17};
var obj = new TestObservableObject {ObservableChild = childOne};
var scheduler = new TestScheduler();
var observer = scheduler.CreateObserver<int>();
var expected = new[]
{
OnNext(000, childOne.Age),
OnNext(000, 20),
OnNext(300, childTwo.Age),
};
var sut = obj.WhenValue(x => x.ObservableChild.Age);
// Act
sut.Subscribe(observer);
obj.ObservableChild.Age = 20;
scheduler.AdvanceTo(100);
obj.ObservableChild = null;
scheduler.AdvanceTo(300);
obj.ObservableChild = childTwo;
// Assert
Assert.AreEqual(expected, observer.Messages);
}
public void When_Subscribed_Then_OnNext_Changes()
{
// Arrange
var obj = new TestObservableObject {ObservableChild = new TestObservableObject {Age = 3}};
var replacementChild = new TestObservableObject {Age = 5};
var scheduler = new TestScheduler();
var observer = scheduler.CreateObserver<TestObservableObject>();
var expected = new[]
{
OnNext(000, obj.ObservableChild),
OnNext(010, replacementChild),
OnNext(010, replacementChild),
OnNext(020, replacementChild),
};
var sut = obj.WhenAny(x => x.ObservableChild).ForProperty<TestObservableObject>("Age", "Name");
// Act
sut.Subscribe(observer);
scheduler.AdvanceTo(10);
obj.ObservableChild = replacementChild;
obj.ObservableChild.Age = 17;
scheduler.AdvanceTo(20);
obj.ObservableChild.Name = "Billy";
// Assert
Assert.AreEqual(expected, observer.Messages);
}
public void When_Path_Has_Null_Intermediary_Node_Then_Propagates_ProvertyValueChanged_With_HasValue_False()
{
// Arrange
var childOne = new TestObservableObject {Age = 5};
var childTwo = new TestObservableObject {Age = 17};
var obj = new TestObservableObject {ObservableChild = childOne};
var scheduler = new TestScheduler();
var observer = scheduler.CreateObserver<IPropertyValueChanged<int>>();
var expected = new[]
{
OnNext(000, PropertyValueChanged.CreateWithValue(childOne, "Age", childOne.Age)),
OnNext(000, PropertyValueChanged.CreateWithValue(childOne, "Age", 20)),
OnNext(100, PropertyValueChanged.CreateWithoutValue<TestObservableObject, int>(null, "Age")),
OnNext(300, PropertyValueChanged.CreateWithValue(childTwo, "Age", childTwo.Age)),
};
var sut = obj.When(x => x.ObservableChild.Age);
// Act
sut.Subscribe(observer);
obj.ObservableChild.Age = 20;
scheduler.AdvanceTo(100);
obj.ObservableChild = null;
scheduler.AdvanceTo(300);
obj.ObservableChild = childTwo;
// Assert
Assert.AreEqual(expected, observer.Messages);
}
public void When_Subscribe_To_Property_With_Broken_Path_Then_OnNext_Initial_Image_With_Null_Source()
{
// Arrange
var obj = new TestObservableObject();
var scheduler = new TestScheduler();
var observer = scheduler.CreateObserver<IPropertyChanged<TestObservableObject>>();
var expected = new[]
{
OnNext(000, PropertyChanged.Create(default(TestObservableObject))),
};
var sut = obj.WhenAny(x => x.PocoChild.ObservableChild);
// Act
sut.Subscribe(observer);
// Assert
Assert.AreEqual(expected, observer.Messages);
}
public void When_Subscribe_With_One_Node_Path_To_Property_Then_OnNext_Initial_Image_And_Changes()
{
// Arrange
var obj = new TestObservableObject {Age = 5};
var scheduler = new TestScheduler();
var observer = scheduler.CreateObserver<IPropertyChanged<TestObservableObject>>();
var expected = new[]
{
OnNext(000, PropertyChanged.Create(obj)),
OnNext(000, PropertyChanged.Create(obj, "Age")),
};
var sut = obj.WhenAny();
// Act
sut.Subscribe(observer);
obj.Age = 10;
// Assert
Assert.AreEqual(expected, observer.Messages);
}
public void When_Subscribe_Via_Interface_To_Poco_Source_Then_OnNext_Initial_Value_Only()
{
// Arrange
var obj = new TestPoco {Age = 3} as ITestObject;
var scheduler = new TestScheduler();
var observer = scheduler.CreateObserver<IPropertyValueChanged<int>>();
var expected = new[]
{
OnNext(000, PropertyValueChanged.CreateWithValue(obj, "Age", 3)),
};
var sut = obj.When(x => x.Age);
// Act
sut.Subscribe(observer);
scheduler.AdvanceTo(10);
obj.Age = 5;
// Assert
Assert.AreEqual(expected, observer.Messages);
}
public void When_Property_Declared_On_Base_Class_Then_OnNext_Changes()
{
// Arrange
var obj = new DerivedTestObservableObject {Age = 100};
var scheduler = new TestScheduler();
var observer = scheduler.CreateObserver<int>();
var expected = new[]
{
OnNext(000, 100),
OnNext(000, 20),
};
var sut = obj.WhenValue(x => x.Age);
// Act
sut.Subscribe(observer);
obj.Age = 20;
// Assert
Assert.AreEqual(expected, observer.Messages);
}
public void When_Property_Declared_On_Base_Class_Then_OnNext_Changes()
{
// Arrange
var obj = new DerivedTestPoco() {Age = 100};
var scheduler = new TestScheduler();
var observer = scheduler.CreateObserver<IPropertyValueChanged<int>>();
var expected = new[]
{
// Since reflection is used, the PropertyValueChange is typed to the property declaring class not the derived one.
// This impacts the test assert as they are IEquatable=false if the TClass types disagree. So make it TestPoco not
// DerivedTestPoco.
OnNext(000, PropertyValueChanged.CreateWithValue((TestPoco) obj, "Age", 100)),
};
var sut = obj.When(x => x.Age);
// Act
sut.Subscribe(observer);
obj.Age = 20;
// Assert
Assert.AreEqual(expected, observer.Messages);
}
public void When_Subscribe_With_Two_Node_Path_To_Property_And_Modify_Node_One_Then_OnNext_Changes()
{
// Arrange
var obj = new TestObservableObject {ObservableChild = new TestObservableObject {Age = 3}};
var replacementChild = new TestObservableObject {Age = 5};
var scheduler = new TestScheduler();
var observer = scheduler.CreateObserver<IPropertyChanged<TestObservableObject>>();
var expected = new[]
{
OnNext(000, PropertyChanged.Create(obj.ObservableChild)),
OnNext(010, PropertyChanged.Create(replacementChild)),
OnNext(010, PropertyChanged.Create(replacementChild, "Age")),
};
var sut = obj.WhenAny(x => x.ObservableChild);
// Act
sut.Subscribe(observer);
scheduler.AdvanceTo(10);
obj.ObservableChild = replacementChild;
obj.ObservableChild.Age = 17;
// Assert
Assert.AreEqual(expected, observer.Messages);
}
public void When_Subscribe_With_One_Node_Path_To_Property_Then_OnNext_Changes()
{
// Arrange
var obj = new TestPoco() {Age = 5};
var scheduler = new TestScheduler();
var observer = scheduler.CreateObserver<IPropertyValueChanged<int>>();
var expected = new[]
{
OnNext(000, PropertyValueChanged.CreateWithValue(obj, "Age", 5)),
};
var sut = obj.When(x => x.Age);
// Act
sut.Subscribe(observer);
obj.Age = 3; // This should not fire through.
// Assert
Assert.AreEqual(expected, observer.Messages);
}
public void When_Subscribe_With_Two_Node_Path_To_Property_And_Modify_Node_One_Then_OnNext_Changes()
{
// Arrange
var childOne = new TestPoco {Age = 3};
var childTwo = new TestPoco() {Age = 5};
var obj = new TestObservableObject {PocoChild = childOne};
var scheduler = new TestScheduler();
var observer = scheduler.CreateObserver<IPropertyValueChanged<int>>();
var expected = new[]
{
OnNext(000, PropertyValueChanged.CreateWithValue(childOne, "Age", 3)),
OnNext(010, PropertyValueChanged.CreateWithValue(childTwo, "Age", 5)),
};
var sut = obj.When(x => x.PocoChild.Age);
// Act
sut.Subscribe(observer);
scheduler.AdvanceTo(10);
obj.PocoChild = childTwo;
// Assert
Assert.AreEqual(expected, observer.Messages);
}
public void When_Subscribe_With_One_Node_Path_To_Property_Then_OnNext_Changes()
{
// Arrange
var obj = new TestObservableObject {Age = 5};
var scheduler = new TestScheduler();
var observer = scheduler.CreateObserver<int>();
var expected = new[]
{
OnNext(000, 5),
};
var sut = obj.WhenValue(x => x.Age);
// Act
sut.Subscribe(observer);
// Assert
Assert.AreEqual(expected, observer.Messages);
}
public void When_Subscribe_With_Two_Node_Path_To_Property_And_Modify_Property_Then_OnNext_Changes()
{
// Arrange
var obj = new TestObservableObject {ObservableChild = new TestObservableObject {Age = 3}};
var scheduler = new TestScheduler();
var observer = scheduler.CreateObserver<int>();
var expected = new[]
{
OnNext(000, 3),
OnNext(010, 5),
};
var sut = obj.WhenValue(x => x.ObservableChild.Age);
// Act
sut.Subscribe(observer);
scheduler.AdvanceTo(10);
obj.ObservableChild.Age = 5;
// Assert
Assert.AreEqual(expected, observer.Messages);
}