public void NestedDynamicSources()
{
var a = new CompositeSourceSet <CompositeSourceSet <int> >();
var b = new CompositeSourceSet <int>();
var c = new CompositeSourceSet <int>();
var d = new CompositeSourceSet <int>();
var e =
from p in a
from q in p
select q;
b.Source = b.Source.Add(1);
b.Source = b.Source.Add(2);
a.Source = a.Source.Add(b);
using (var s = e.Subscribe())
{
s.Items.Should().BeEquivalentTo(1, 2);
a.Source = a.Source.Remove(b);
s.Items.Should().BeEquivalentTo();
a.Source = a.Source.Add(c);
s.Items.Should().BeEquivalentTo();
c.Source = c.Source.Add(2);
s.Items.Should().BeEquivalentTo(2);
c.Source = c.Source.Add(3);
s.Items.Should().BeEquivalentTo(2, 3);
a.Source = a.Source.Add(b);
s.Items.Should().BeEquivalentTo(2, 3, 1);
}
}
public void TransformedDynamicSources()
{
var a = new CompositeSourceSet <ICompositeSet <string> >();
var b = new CompositeSourceSet <int>();
var c = new CompositeSourceSet <int>();
var e =
from p in a
from q in p
select q + "x";
b.Source = b.Source.Add(1);
b.Source = b.Source.Add(2);
var bt = b.Select(v => v.ToString());
a.Source = a.Source.Add(bt);
var count = 0;
using (var s = e.Subscribe())
{
s.WhenAnyValue(p => p.Items).Subscribe(_ => count++);
s.Items.Should().BeEquivalentTo("1x", "2x");
a.Source = a.Source.Remove(bt);
s.Items.Should().BeEquivalentTo();
a.Source = a.Source.Add(c.Select(v => v.ToString()));
s.Items.Should().BeEquivalentTo();
c.Source = c.Source.Add(2);
s.Items.Should().BeEquivalentTo("2x");
c.Source = c.Source.Add(3);
s.Items.Should().BeEquivalentTo("2x", "3x");
a.Source = a.Source.Add(bt);
s.Items.Should().BeEquivalentTo("2x", "3x", "1x");
}
// 6 changes should be recorded
count.Should().Be(5);
}
public void AnEmptySetIsEmpty()
{
var a = new CompositeSourceSet <int> {
};
var b = new CompositeSourceSet <int> {
};
var c = new CompositeSourceSet <int> {
};
var x = new CompositeSet <int>(a, b);
var y = new CompositeSet <int>(x, c);
using (var s = y.Subscribe())
{
a.Source = a.Source.Add(1);
s.Items.ShouldBeEquivalentTo(new[] { 1 });
b.Source = b.Source.Add(1);
s.Items.Should().BeEquivalentTo(new[] { 1 });
b.Source = b.Source.Add(3);
s.Items.Should().BeEquivalentTo(new[] { 1, 3 });
c.Source = c.Source.Union(new [] { 5, 6, 8 });
s.Items.Should().BeEquivalentTo(new[] { 1, 3, 5, 6, 8 });
}
}
