print("\n--- Test: super calls ---");

class A { }
class B extends A { }
class C extends B { }

extension A { func v() { return 1; } }
extension B { func v() { return super.v() + 1; } }
extension C { func v() { return super.v() + 1; } }

var a = A();
var b = B();
var c = C();

assert(a.v() == 1, "A.v");
assert(b.v() == 2, "B.v via super");
assert(c.v() == 3, "C.v via super chain");

print("super calls: PASS");