public void OFPSimpleChildPropertyTest()
{
new TestScheduler().With(sched =>
{
var fixture = new HostTestFixture
{
Child = new TestFixture()
};
fixture.ObservableForProperty(x => x.Child.IsOnlyOneWord)
.ToObservableChangeSet(ImmediateScheduler.Instance)
.Bind(out var changes)
.Subscribe();
fixture.Child.IsOnlyOneWord = "Foo";
sched.Start();
Assert.Equal(1, changes.Count);
fixture.Child.IsOnlyOneWord = "Bar";
sched.Start();
Assert.Equal(2, changes.Count);
fixture.Child.IsOnlyOneWord = "Baz";
sched.Start();
Assert.Equal(3, changes.Count);
fixture.Child.IsOnlyOneWord = "Baz";
sched.Start();
Assert.Equal(3, changes.Count);
Assert.True(changes.All(x => x.Sender == fixture));
Assert.True(changes.All(x => x.GetPropertyName() == "Child.IsOnlyOneWord"));
changes.Select(x => x.Value).AssertAreEqual(new[] { "Foo", "Bar", "Baz" });
});
}
public void OFPChangingTheHostPropertyShouldFireAChildChangeNotificationOnlyIfThePreviousChildIsDifferent()
{
new TestScheduler().With(sched =>
{
var fixture = new HostTestFixture
{
Child = new TestFixture()
};
fixture.ObservableForProperty(x => x.Child.IsOnlyOneWord)
.ToObservableChangeSet(ImmediateScheduler.Instance)
.Bind(out var changes)
.Subscribe();
fixture.Child.IsOnlyOneWord = "Foo";
sched.Start();
Assert.Equal(1, changes.Count);
fixture.Child.IsOnlyOneWord = "Bar";
sched.Start();
Assert.Equal(2, changes.Count);
fixture.Child = new TestFixture
{
IsOnlyOneWord = "Bar"
};
sched.Start();
Assert.Equal(2, changes.Count);
});
}
public void OFPReplacingTheHostShouldResubscribeTheObservable()
{
new TestScheduler().With(sched =>
{
var fixture = new HostTestFixture
{
Child = new TestFixture()
};
fixture.ObservableForProperty(x => x.Child.IsOnlyOneWord)
.ToObservableChangeSet(ImmediateScheduler.Instance)
.Bind(out var changes)
.Subscribe();
fixture.Child.IsOnlyOneWord = "Foo";
sched.Start();
Assert.Equal(1, changes.Count);
fixture.Child.IsOnlyOneWord = "Bar";
sched.Start();
Assert.Equal(2, changes.Count);
// Tricky! This is a change too, because from the perspective
// of the binding, we've went from "Bar" to null
fixture.Child = new TestFixture();
sched.Start();
Assert.Equal(3, changes.Count);
// Here we've set the value but it shouldn't change
fixture.Child.IsOnlyOneWord = null;
sched.Start();
Assert.Equal(3, changes.Count);
fixture.Child.IsOnlyOneWord = "Baz";
sched.Start();
Assert.Equal(4, changes.Count);
fixture.Child.IsOnlyOneWord = "Baz";
sched.Start();
Assert.Equal(4, changes.Count);
Assert.True(changes.All(x => x.Sender == fixture));
Assert.True(changes.All(x => x.GetPropertyName() == "Child.IsOnlyOneWord"));
changes.Select(x => x.Value).AssertAreEqual(new[] { "Foo", "Bar", null, "Baz" });
});
}