public void Create_SimpleExpression_WrongValueSet_CallsOnError()
{
var source = new GenericNotifyPropertyChanged<GenericNotifyPropertyChanged<int>>();
source.Value = new GenericNotifyPropertyChanged<int>();
var expected = (new int[] { 0, 1 }).ToObservable();
// TODO: Add this to expected sequence after SequenceEqual is switched
// to somethin more elaborate
//.Concat<int>(Observable.Throw<int>(new NullReferenceException()));
var actual = ObservableEx.Create(() => source.Value.Value);
bool completed = false;
Exception error = null;
using (actual.SequenceEqual(expected)
.ObserveOn(Scheduler.Immediate).Subscribe(
Assert.IsTrue,
e => error = e,
() => completed = true))
{
source.Value.Value = 1;
source.Value = null;
}
Assert.IsNotNull(error, "OnError not called");
Assert.IsInstanceOfType(error, typeof(NullReferenceException), "Wrong type of exception");
Assert.IsFalse(completed, "Sequence complete");
}
public void BindFromExpression_ComplexBinding_WrongInitialValue_ThrowsExeption()
{
var target = new GenericBindingTarget<int>();
var source1 = new GenericNotifyPropertyChanged<int>();
var source2 = new GenericNotifyPropertyChanged<GenericNotifyPropertyChanged<int>>();
BindingEx.BindFromExpression(() => target.Value == source1.Value + source2.Value.Value);
}
public void BindFromExpression_ComplexBinding()
{
var target = new GenericBindingTarget<int>();
var source1 = new GenericNotifyPropertyChanged<int>();
var source2 = new GenericNotifyPropertyChanged<int>();
BindingEx.BindFromExpression(() => target.Value == source1.Value + source2.Value);
Assert.AreEqual(0, target.Value);
source1.Value = 1;
Assert.AreEqual(1, target.Value);
source2.Value = 1;
Assert.AreEqual(2, target.Value);
}
public void Create_SimpleExpression()
{
var source = new GenericNotifyPropertyChanged<int>();
var expected = (new int[] {0, 1, 2}).ToObservable();
var actual = ObservableEx.Create(() => source.Value);
using (actual.SequenceEqual(expected)
.ObserveOn(Scheduler.Immediate)
.Subscribe(Assert.IsTrue, Assert.Fail))
{
source.Value = 1;
source.Value = 2;
}
}
public void BindFromExpression_ComplexBinding_DisposeSubsription_RemovesBinding()
{
var target = new GenericBindingTarget<int>();
var source1 = new GenericNotifyPropertyChanged<int>();
var source2 = new GenericNotifyPropertyChanged<int>();
using (BindingEx.BindFromExpression(() => target.Value == source1.Value + source2.Value))
{
Assert.AreEqual(0, target.Value);
source1.Value = 1;
Assert.AreEqual(1, target.Value);
source2.Value = 1;
Assert.AreEqual(2, target.Value);
}
source1.Value = 2;
source2.Value = 2;
// Value should be reseted to 0
Assert.AreEqual(0, target.Value);
}
public void Create_ComplexExpression()
{
var source1 = new GenericNotifyPropertyChanged<int>();
var source2 = new GenericNotifyPropertyChanged<int>();
var expected = (new int[] { 0, 1, 2 }).ToObservable();
var actual = ObservableEx.Create(() => source1.Value + source2.Value);
bool completed = false;
using (actual.Take(3).SequenceEqual(expected)
.ObserveOn(Scheduler.Immediate)
.Subscribe(Assert.IsTrue, e => Assert.Fail("Exception occured"), () => completed = true))
{
source1.Value = 1;
source2.Value = 1;
}
Assert.IsTrue(completed, "Sequence not complete");
}
public void Create_SimpleExpression_WrongInitialValue_CallsOnError()
{
var source = new GenericNotifyPropertyChanged<GenericNotifyPropertyChanged<int>>();
var actual = ObservableEx.Create(() => source.Value.Value);
bool completed = false;
Exception error = null;
using (actual.Subscribe(
i => Assert.Fail("OnNext"),
e => error = e,
() => completed = true))
{
source.Value = new GenericNotifyPropertyChanged<int>();
source.Value.Value = 1;
}
Assert.IsNotNull(error, "OnError not called");
Assert.IsInstanceOfType(error, typeof(NullReferenceException), "Wrong type of exception");
Assert.IsFalse(completed, "Sequence complete");
}
public void FromExpression_SimpleBinding()
{
var target = new GenericBindingTarget<int>();
var source = new GenericNotifyPropertyChanged<int>();
BindingBase binding = BindingEx.FromExpression(() => source.Value);
target.SetBinding(GenericBindingTarget<int>.ValueProperty, binding);
Assert.AreEqual(0, target.Value);
source.Value = 1;
Assert.AreEqual(1, target.Value);
}
public void BindFromExpression_SimpleBinding_WrongValueSet_ThrowsExeption()
{
var target = new GenericBindingTarget<int>();
var source = new GenericNotifyPropertyChanged<GenericNotifyPropertyChanged<int>>();
source.Value = new GenericNotifyPropertyChanged<int>();
BindingEx.BindFromExpression(() => target.Value == source.Value.Value);
Assert.AreEqual(0, target.Value);
source.Value.Value = 1;
Assert.AreEqual(1, target.Value);
source.Value = null;
}