public void ShouldOnlyAddEvenNumbers()
{
var source = new ObservableCollection<int>();
var dest = new List<int>();
source.PushChangesTo(dest).AddOnlyIf(NumberIsEven);
source.Add(1);
dest.ShouldNotContain(1);
source.Add(2);
dest.ShouldContain(2);
}
public void ShouldExecuteAfterAdding()
{
var source = new ObservableCollection<int>();
var dest = new List<int>();
source.PushChangesTo(dest).If(NumberIsEven)
.Execute(IncrementCount).AfterAdding();
source.Add(1);
notifiedCount.ShouldBe(0);
source.Add(2);
notifiedCount.ShouldBe(1);
}
public void ShouldMaintainInitialDifferences()
{
var source = new ObservableCollection<int>();
var dest = new List<int>();
source.Add(1);
source.PushChangesTo(dest);
dest.ShouldNotContain(1);
source.Remove(1);
dest.ShouldNotContain(1);
}
public void ShouldActAsAnEvenFilter()
{
var source = new ObservableCollection<int>();
var dest = new List<int>();
source.PushChangesTo(dest).If(NumberIsEven);
source.Add(1);
dest.ShouldNotContain(1);
source.Add(2);
dest.ShouldContain(2);
source.Remove(2);
dest.ShouldNotContain(2);
dest.Add(1);
source.Remove(1);
dest.ShouldContain(1);
}
public void ShouldExecuteCallBacksInCorrectOrder()
{
var source = new ObservableCollection<int>();
var dest = new List<int> {1, 2, 3};
source.PushChangesTo(dest)
.Execute(item => dest.Count.ShouldBe(3)).BeforeAdding()
.Execute(item => dest.Count.ShouldBe(4)).AfterAdding()
.Execute(item => dest.Count.ShouldBe(4)).BeforeRemoving()
.Execute(item => dest.Count.ShouldBe(3)).AfterRemoving();
source.Add(4);
source.Remove(4);
}
public void ShouldPushChangesToAListGivenAMapping()
{
var source = new ObservableCollection<int>();
var dest = new List<float>();
source.PushChangesTo(dest).WithMapping(i => i);
source.Add(1);
dest.ShouldContain(1.00f);
source.Remove(1);
dest.ShouldNotContain(1.00f);
}