public async Task Should_Not_Load_Duplicate_Pages()
{
var trigger = new Subject <Unit>();
var target = new TestSource(loadTrigger: trigger);
var task1 = target.GetPage(1);
var task2 = target.GetPage(1);
Assert.That(target.PagesLoaded, Is.Empty);
trigger.OnNext(Unit.Default);
trigger.OnNext(Unit.Default);
await task1;
await task2;
Assert.That(target.PagesLoaded, Is.EqualTo(new[] { 0, 1 }));
}
public void GetPage_Should_Stop_Loading_Pages_When_LoadPage_Throws()
{
var target = new TestSource(2);
Assert.That(target.PagesLoaded, Is.Empty);
Assert.ThrowsAsync <AggregateException>(() => target.GetPage(3));
Assert.That(target.PagesLoaded, Is.EqualTo(new[] { 0, 1 }));
}
public void IsLoading_Should_Be_Set_To_False_When_LoadPage_Throws()
{
var target = new TestSource(2);
Assert.That(target.PagesLoaded, Is.Empty);
Assert.ThrowsAsync <AggregateException>(() => target.GetPage(3));
Assert.That(target.IsLoading, Is.False);
}
public async Task GetPage_Should_Load_Pages()
{
var target = new TestSource();
Assert.That(target.PagesLoaded, Is.Empty);
var count = await target.GetPage(3);
Assert.That(target.PagesLoaded, Is.EqualTo(new[] { 0, 1, 2, 3 }));
}