public void TestCase()
{
var bird = new Bird {
Age = 9
};
var lizard = new Lizard {
Age = 9
};
var dragon = new Dragon {
Age = 9
};
Assert.AreEqual(dragon.Fly(), bird.Fly());
Assert.AreEqual(dragon.Crawl(), lizard.Crawl());
}
public Dragon()
{
bird = new Bird();
lizard = new Lizard();
}
public Dragon()
{
this.bird = new Bird();
this.lizard = new Lizard();
}
public Dragon(Bird bird, Lizard lizard)
{
this.bird = bird ?? throw new ArgumentNullException(paramName: nameof(bird));
this.lizard = lizard ?? throw new ArgumentNullException(paramName: nameof(lizard));
}
