cpp-descriptive-pointers/copy_ptr.t.h

//
//  copy_ptr.t.h
//  pointers
//
//  Created by Sam Jaffe on 1/5/17.
//

#pragma once

#include <cxxtest/TestSuite.h>

#include "copy_ptr.hpp"

class copy_ptr_TestSuite : public CxxTest::TestSuite {
private:
  struct copy_me {};

  class base {
  public:
    virtual ~base() {}
    virtual base* clone() const = 0;
    virtual int id() const = 0;
  };
  
  class derived_0 : public base {
  public:
    static const constexpr int ID = 0;
    virtual base * clone() const override { return new derived_0; }
    virtual int id() const override { return ID; }
  };
  
  class derived_1 : public base {
  public:
    static const constexpr int ID = 1;
    virtual base * clone() const override { return new derived_1; }
    virtual int id() const override { return ID; }
  };
public:
  void test_copy_new_obj() {
    copy_ptr<copy_me> c1 { new copy_me };
    copy_ptr<copy_me> c2 { c1 };
    TS_ASSERT_DIFFERS( c1.get(), c2.get() );
  }
  
  void test_clone_polymorpic_object() {
    using ptr_t = clone_ptr<base, &base::clone>;
    ptr_t c0 { new derived_0 };
    TS_ASSERT_EQUALS( ptr_t( c0 )->id(), derived_0::ID);
    ptr_t c1 { new derived_1 };
    TS_ASSERT_EQUALS( ptr_t( c1 )->id(), derived_1::ID);
  }
};