public void CastSafe()
{
var airplane = new Airplane();
Assert.NotNull(airplane.CastSafe <IAirplane>());
Assert.Null(airplane.CastSafe <Engine>());
Assert.Null(airplane.CastSafe <IAirplane>().Engine);
airplane.Engine = new Engine();
Assert.NotNull(airplane.CastSafe <IAirplane>().Engine);
Assert.True(true);
}
public void Guard()
{
// cast guard
var jet = new Jet();
Assert.Null(jet.CastSafe <Airplane>());
// null guard
var airplane = new Airplane();
Assert.Null(airplane.With(a => a.Engine));
// condition guard
airplane.Engine = new Engine();
Assert.Null(airplane.If(a => a.Engine.HasFuel));
// all guards pass
airplane.Engine.HasFuel = true;
var result = string.Empty;
airplane.CastSafe <Airplane>().With(a => a.Engine).If(e => e.HasFuel).Do(e => result = "success");
Assert.Equal("success", result);
Assert.True(true);
}
