cpp-descriptive-pointers/test/const_ptr_test.cxx

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

#include "pointers/const_propogating_ptr.hpp"
#include "pointers/const_ptr.hpp"

#include <gmock/gmock.h>

#include "test_stubs.h"

using namespace pointers;

TEST(ConstPtrTest, NonConstCPCallConstMethods) {
  std::shared_ptr<const_tracking_stub> p{new const_tracking_stub};
  const_ptr<std::shared_ptr<const_tracking_stub>> cp{p};
  EXPECT_TRUE(cp->is_const());
}

TEST(ConstPtrTest, ConstCPCallConstMethods) {
  std::shared_ptr<const_tracking_stub> p{new const_tracking_stub};
  const_ptr<std::shared_ptr<const_tracking_stub>> const cp{p};
  EXPECT_TRUE(cp->is_const());
}

TEST(ConstPtrTest, CanConstructFromConstPropogatingPtr) {
  std::shared_ptr<const_tracking_stub> p{new const_tracking_stub};
  const_propogating_ptr<std::shared_ptr<const_tracking_stub>> cpp{p};
  const_ptr<std::shared_ptr<const_tracking_stub>> cp{p};
  EXPECT_THAT(cp.get(), cpp.get());
  EXPECT_FALSE(cpp->is_const());
  EXPECT_TRUE(cp->is_const());
}

TEST(ConstPtrTest, DoesNotDeleteRawPtr) {
  bool has_delete{false};
  destructor_sentinal * test_struct = new destructor_sentinal{has_delete};
  const_ptr<destructor_sentinal *>{test_struct};
  EXPECT_FALSE(has_delete);
  delete test_struct;
  EXPECT_TRUE(has_delete);
}