print("\n--- Test: Class Inheritance (extensions) ---");

class Animal { var name; func init(n) { this.name = n; } }
extension Animal { func speak() { return this.name + "?"; } }

class Dog extends Animal { }
extension Dog { func bark() { return this.name + " woof"; } }

var a = Animal("crit");
var d = Dog("fido");

assert(a.speak() == "crit?", "Animal.speak works");
assert(d.speak() == "fido?", "Dog inherits Animal.speak via extension chain");
assert(d.bark() == "fido woof", "Dog.bark works");

print("Inheritance via extensions: PASS");


print("\n--- Test: Class Inheritance (inline methods) ---");

class Animal2 {
  var name;
  func init(n) { this.name = n; }
  func speak() { return this.name + "!"; }
}

class Dog2 extends Animal2 {
  func bark() { return this.name + " woof"; }
}

var a2 = Animal2("crit");
var d2 = Dog2("fido");

assert(a2.speak() == "crit!", "Animal2.speak works (inline)");
assert(d2.speak() == "fido!", "Dog2 inherits Animal2.speak (inline)");
assert(d2.bark() == "fido woof", "Dog2.bark works (inline)");

print("Inheritance via inline methods: PASS");