public NewFighterContext(MainContext mainContext)
{
MainContext = mainContext;
AddFighterCommand = CommandFactory.Create(AddNewFighter, CanAddNewFighter,
this, IsValidProperty);
}
public void AddFighter()
{
// Arrange: create a main context.
var main = new MainContext(null);
// Assert: no fighters should be added yet
Assert.AreEqual(main.World.Fighters.Count, 0);
// Act: create new fighter context
var newFighterContext = new NewFighterContext(main);
// Assert: context must be invalid (name not yet given)
Assert.IsFalse(newFighterContext.IsValid);
// Act: set name
newFighterContext.Name = "newFighter";
// Assert: context must be valid now
Assert.IsTrue(newFighterContext.IsValid);
// Assert: we must be able to add the fighter now.
Assert.IsTrue(newFighterContext.AddFighterCommand.CanExecute(null));
// Act: Add a new fighter
newFighterContext.AddFighterCommand.Execute(null);
// Assert: the new fighter must have been added and be the selected one.
Assert.AreEqual(main.World.Fighters.Count, 1);
Assert.AreEqual(main.SelectedFighter, main.World.Fighters[0]);
// Assert: the fighter should have the correct name
Assert.AreEqual(main.SelectedFighter.Name, newFighterContext.Name);
}
public void Convert()
{
// Arrange: create a world model.
var world = new World();
var spitfire = new Fighter { Name = "Spitfire", PositionX = 100, PositionY = 200, Rotation = 45 };
var stuka = new Fighter { Name = "Stuka", PositionX = 300, PositionY = 400, Rotation = 90, Target = spitfire };
world.Fighters.Add(spitfire);
world.Fighters.Add(stuka);
// Act: convert to view model.
var mainContext = new MainContext(null);
var worldContext = new WorldContext(mainContext, world);
// Assert: verify view model
Assert.IsNotNull(worldContext.Fighters);
Assert.AreEqual(2, worldContext.Fighters.Count);
FighterContext spitfireContext = worldContext.Fighters.FirstOrDefault(f => f.Name == "Spitfire");
Assert.IsNotNull(spitfireContext);
Assert.AreEqual("Spitfire", spitfireContext.Name);
Assert.AreEqual(100.0, spitfireContext.Position.X);
Assert.AreEqual(200.0, spitfireContext.Position.Y);
Assert.AreEqual(45.0, spitfireContext.Rotation);
Assert.AreEqual(null, spitfireContext.Target);
FighterContext stukaContext = worldContext.Fighters.FirstOrDefault(f => f.Name == "Stuka");
Assert.IsNotNull(stukaContext);
Assert.AreEqual("Stuka", stukaContext.Name);
Assert.AreEqual(300.0, stukaContext.Position.X);
Assert.AreEqual(400.0, stukaContext.Position.Y);
Assert.AreEqual(90.0, stukaContext.Rotation);
Assert.AreEqual(spitfireContext, stukaContext.Target);
// Act: convert back to model.
world = worldContext.CreateModel();
// Assert: correctness of created model.
Assert.IsNotNull(world.Fighters);
Assert.AreEqual(2, world.Fighters.Count);
spitfire = world.Fighters.FirstOrDefault(f => f.Name == "Spitfire");
Assert.IsNotNull(spitfire);
Assert.AreEqual("Spitfire", spitfire.Name);
Assert.AreEqual(100, spitfire.PositionX);
Assert.AreEqual(200, spitfire.PositionY);
Assert.AreEqual(45, spitfire.Rotation);
Assert.AreEqual(null, spitfire.Target);
stuka = world.Fighters.FirstOrDefault(f => f.Name == "Stuka");
Assert.IsNotNull(stuka);
Assert.AreEqual("Stuka", stuka.Name);
Assert.AreEqual(300, stuka.PositionX);
Assert.AreEqual(400, stuka.PositionY);
Assert.AreEqual(90, stuka.Rotation);
Assert.AreEqual(spitfire, stuka.Target);
}
public WorldContext(MainContext parent, World worldModel)
{
Main = parent;
// Create fighter contexts from fighter models.
// Use an anonymous class to associate
// the original model with the new context.
var newFighterPairs =
from model in worldModel.Fighters
select new
{
model,
context = new FighterContext(this)
{
Name = model.Name,
Position = new Point(model.PositionX, model.PositionY),
Rotation = model.Rotation
}
};
// For fast lookup, convert the list of model <-> context pairs to a dictionary.
Dictionary<Fighter, FighterContext> newFighterMap =
newFighterPairs.ToDictionary(pair => pair.model, pair => pair.context);
// Set the Target properties (these are possibly cyclically connected)
foreach (var pair in newFighterMap)
{
Fighter targetFighter = pair.Key.Target;
if (targetFighter != null)
{
FighterContext fighterContext = pair.Value;
fighterContext.Target = newFighterMap[targetFighter];
}
}
Fighters = new UndoableCollection<FighterContext>(this, newFighterMap.Values);
}
public WorldContext(MainContext parent)
{
Main = parent;
Fighters = new UndoableCollection<FighterContext>(this);
}
public MainWindow()
{
DataContext = new MainContext(new Evolution(100));
InitializeComponent();
}
public void RemoveFighter()
{
// Arrange: create a main context.
var main = new MainContext(null);
// Assert: we should not be able to remove a fighter.
Assert.IsFalse(main.RemoveFighterCommand.CanExecute(null));
// Arrange: add a 3 of fighters, select the second
var fighter1 = new FighterContext(main.World);
var fighter2 = new FighterContext(main.World);
var fighter3 = new FighterContext(main.World);
main.World.Fighters.Add(fighter1);
main.World.Fighters.Add(fighter2);
main.World.Fighters.Add(fighter3);
// Assert: we should not yet be able to remove a fighter.
Assert.IsFalse(main.RemoveFighterCommand.CanExecute(null));
// Select the second fighter.
main.SelectedFighter = fighter2;
// Assert: we should now be able to remove the fighter.
Assert.IsTrue(main.RemoveFighterCommand.CanExecute(null));
// Act: remove fighter2
main.RemoveFighterCommand.Execute(null);
// Assert: fighter2 should be removed.
Assert.IsTrue(main.World.Fighters.SequenceEqual(new[] {fighter1, fighter3}));
// Assert: fighter3 should now be selected.
Assert.AreEqual(main.SelectedFighter, fighter3);
// Assert: we should now be able to remove fighter3.
Assert.IsTrue(main.RemoveFighterCommand.CanExecute(null));
// Act: remove fighter3
main.RemoveFighterCommand.Execute(null);
// Assert: fighter3 should be removed.
Assert.IsTrue(main.World.Fighters.SequenceEqual(new[] { fighter1 }));
// Assert: fighter1 should now be selected.
Assert.AreEqual(main.SelectedFighter, fighter1);
// Assert: we should now be able to remove fighter1.
Assert.IsTrue(main.RemoveFighterCommand.CanExecute(null));
// Act: remove fighter1
main.RemoveFighterCommand.Execute(null);
// Assert: nothing should be selected.
Assert.IsNull(main.SelectedFighter);
// Assert: world should be empty now.
Assert.AreEqual(main.World.Fighters.Count, 0);
}
public void New()
{
// Arrange: create a main context.
var main = new MainContext(null);
// Assert: verify it has a valid and empty world.
Assert.IsNotNull(main.World);
Assert.IsNotNull(main.World.Fighters);
Assert.AreEqual(main.World.Fighters.Count, 0);
// Arrange: Add a fighter context.
main.World.Fighters.Add(new FighterContext(main.World));
// Assert: we must be able to call the new command.
Assert.IsTrue(main.NewCommand.CanExecute(null));
// Act: call New command.
main.NewCommand.Execute(null);
// Assert: verify we have an empty world again.
Assert.IsNotNull(main.World);
Assert.IsNotNull(main.World.Fighters);
Assert.AreEqual(main.World.Fighters.Count, 0);
}
