public void TestMethod1()
{
// By default, unit testing assumes that exceptions are thrown when actions are invalid.
// CTRL R, A to run
// Alternatively, go to Tests > Run > All Tests
// arrange
MainViewModel mainViewModel = new MainViewModel();
ObservableCollection <Class> Classes = mainViewModel.Classes;
ObservableCollection <Line> Lines = mainViewModel.Lines;
ObservableCollection <Dot> Dots = mainViewModel.Dots;
Point p = new Point(420, 666);
EClass addingClassType = EClass.Class;
// If our code had been written in a more maintainable manner, maybe triggering ICommand directly could have worked.
//if (mainViewModel.DragAndDropClassCommand.CanExecute(null))
// mainViewModel.DragAndDropClassCommand.Execute(null);
//MouseButtonEventArgs e = new MouseButtonEventArgs(Mouse.PrimaryDevice, 0, MouseButton.Left);
//if (mainViewModel.MouseLeftButtonUpCommand.CanExecute(e))
// mainViewModel.MouseLeftButtonUpCommand.Execute(e);
// assert
Assert.IsTrue(Classes.Count == 0);
// act
mainViewModel.AddAndExecute(new AddClassCommand(Classes, new Class()
{
CanvasCenterX = p.X, CanvasCenterY = p.Y, Style = addingClassType, Name = "Unnamed " + addingClassType
}, Dots));
// assert
Assert.IsFalse(Classes.Count == 0);
Assert.IsTrue(Classes.Count == 1);
Class addedClass = Classes.ElementAt(0);
Assert.AreEqual(addedClass.CanvasCenterX, p.X);
Assert.AreEqual(addedClass.CanvasCenterY, p.Y);
Assert.AreEqual(Dots.Count, 4); // Adding a class should add 4 dots.
// act
if (mainViewModel.UndoCommand.CanExecute(null))
{
mainViewModel.UndoCommand.Execute(null);
}
// assert
Assert.IsTrue(Classes.Count == 0);
Assert.IsTrue(Dots.Count == 0);
}
