public void ConstructorSetsCorrectData()
{
// Arrange
Func <Task <IEnumerable <object> > > loadAction = () => Task.FromResult(Enumerable.Empty <object>());
// Act
var page = new UserSubPage("TITLE", loadAction, 123);
// Assert
Assert.AreEqual(123, page.Count);
Assert.AreEqual("TITLE", page.Title);
}
public void NotifyPropertyChangedIsImplementedCorrectly()
{
// Arrange
Func <Task <IEnumerable <object> > > loadAction = () => Task.FromResult(Enumerable.Empty <object>());
var page = new UserSubPage("", loadAction, 0);
var tester = new PropertyChangedTester(page);
// Act
tester.Test(nameof(UserSubPage.Dispatcher));
// Assert
tester.Verify();
}
public void AsyncLoadCallsFunction()
{
// Arrange
bool called = false;
Func <Task <IEnumerable <object> > > loadAction = () =>
{
called = true;
return(Task.FromResult(Enumerable.Range(1, 2).Cast <object>()));
};
var waitHandle = new ManualResetEventSlim(false);
int loadChanges = 0;
var page = new UserSubPage("", loadAction, 2)
{
Dispatcher = new SyncDispatcher()
};
page.PropertyChanged += (s, e) =>
{
if (e.PropertyName == nameof(UserSubPage.IsLoading))
{
loadChanges++;
if (loadChanges == 2)
{
waitHandle.Set();
}
}
};
// Act
var items = page.Items;
var firstCount = items.Count;
waitHandle.Wait(1000);
// Assert
Assert.IsNotNull(items);
Assert.AreEqual(0, firstCount);
Assert.IsTrue(called);
Assert.AreEqual(2, loadChanges);
Assert.AreEqual(2, items.Count);
}
