cpp-descriptive-pointers/const_ptr.t.h

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

#pragma once

#include <cxxtest/TestSuite.h>

#include "const_ptr.hpp"

class const_ptr_TestSuite : public CxxTest::TestSuite {
public:
  struct mock_object {
    bool is_const( ) { return false; }
    bool is_const( ) const { return true; }
  };
private:
  using ptr_t = std::shared_ptr<mock_object>;
public:
  void test_non_const() {
    ptr_t p { new mock_object };
    const_ptr< ptr_t > cp { p };
    TS_ASSERT( cp->is_const() );
  }
  
  void test_const() {
    ptr_t p { new mock_object };
    const_ptr< ptr_t > const cp { p };
    TS_ASSERT( cp->is_const() );
  }
  
  void test_converts_from_cpp() {
    ptr_t p { new mock_object };
    const_propogating_ptr< ptr_t > cpp { p };
    const_ptr< ptr_t > cp { p };
    TS_ASSERT_EQUALS( cp.get(), cpp.get() );
    TS_ASSERT( ! cpp->is_const() );
    TS_ASSERT( cp->is_const() );
  }
  
  void test_do_not_own() const {
    bool has_delete{false};
    struct test_t {
      ~test_t() { _r = true; }
      bool & _r;
    };
    test_t * test_struct = new test_t{has_delete};
    const_ptr<test_t *>{test_struct};
    TS_ASSERT_EQUALS(has_delete, false);
    delete test_struct;
    TS_ASSERT_EQUALS(has_delete, true);
  }
};