pub class Counter {
    pub i32 count;

    pub constructor(i32 start) {
        self.count = start;
    }

    pub void increment(self mut*) {
        self.count++;
    }

    pub i32 get(self*) {
        self.count
    }
}

pub void test_class_create() {
    let c = Counter::new(0);
    assert_eq!(c.get(), 0);
}

pub void test_class_method() {
    let mut c = Counter::new(5);
    c.increment();
    assert_eq!(c.get(), 6);
}

pub void test_class_field_access() {
    let c = Counter::new(42);
    assert_eq!(c.count, 42);
}

class NamedCounter : Counter {
    pub String name;

    pub constructor(i32 start, String name) {
        self.name = name;
    }

    pub String get_name(self*) {
        self.name.clone()
    }
}

pub void test_class_inherit() {
    let nc = NamedCounter::new(10, "test".to_string());
    assert_eq!(nc.get_name(), "test");
    assert_eq!(nc.count, 10);
}

pub void run_tests() {
    test_class_create();
    test_class_method();
    test_class_field_access();
    test_class_inherit();
}