/* Unit testing for outcomes
(C) 2013-2019 Niall Douglas <http://www.nedproductions.biz/> (7 commits)


Boost Software License - Version 1.0 - August 17th, 2003

Permission is hereby granted, free of charge, to any person or organization
obtaining a copy of the software and accompanying documentation covered by
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FITNESS FOR A PARTICULAR PURPOSE, TITLE AND NON-INFRINGEMENT. IN NO EVENT
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*/

#ifdef _MSC_VER
#pragma warning(disable : 4702)  // unreachable code
#endif

#include <boost/outcome/outcome.hpp>
#include <boost/test/unit_test.hpp>
#include <boost/test/unit_test_monitor.hpp>

BOOST_OUTCOME_AUTO_TEST_CASE(works_outcome_udts, "Tests that the outcome works as intended with user-defined types")
{
  using namespace BOOST_OUTCOME_V2_NAMESPACE;
  // No default constructor, no copy/move, no assignment
  {
    struct udt
    {
      int a;
      explicit udt(int _a)
          : a(_a)
      {
      }
      udt() = delete;
      udt(const udt &) = delete;
      udt(udt &&) = delete;
      udt &operator=(const udt &) = delete;
      udt &operator=(udt &&) = delete;
      ~udt() = default;
    };
    outcome<udt> foo(in_place_type<udt>, 5);
    BOOST_CHECK(5 == foo.value().a);
  }
#ifndef BOOST_NO_EXCEPTIONS
  // Emplace construct, throws during move and copy
  {
    struct udt
    {
      std::string a;
      explicit udt(std::string _a)
          : a(std::move(_a))
      {
      }
      udt() = delete;
      udt(const udt & /*unused*/) { throw std::logic_error("copy"); }
      udt(udt && /*unused*/) noexcept(false) { throw std::logic_error("move"); }  // NOLINT
      udt &operator=(const udt & /*unused*/) { throw std::logic_error("copy"); }
      udt &operator=(udt && /*unused*/) noexcept(false) { throw std::logic_error("move"); }  // NOLINT
      ~udt() { a.clear(); }
    };
    static_assert(!std::is_default_constructible<udt>::value, "udt is default constructible");
    static_assert(std::is_copy_constructible<udt>::value, "udt is not copy constructible");
    static_assert(std::is_move_constructible<udt>::value, "udt is not move constructible");
    static_assert(!std::is_default_constructible<outcome<udt>>::value, "outcome<udt> is default constructible");
    static_assert(std::is_copy_constructible<outcome<udt>>::value, "outcome<udt> is not copy constructible");
    static_assert(std::is_move_constructible<outcome<udt>>::value, "outcome<udt> is not move constructible");
    // Emplace constructs
    outcome<udt> foo(in_place_type<udt>, "niall");
    BOOST_CHECK("niall" == foo.value().a);
    try
    {
      auto foo2(foo);  // NOLINT
      BOOST_CHECK(false);
    }
    catch(const std::logic_error &e)
    {
      BOOST_CHECK(!strcmp(e.what(), "copy"));
    }
    catch(...)
    {
      BOOST_CHECK(false);
    }
    BOOST_CHECK("niall" == foo.value().a);
    try
    {
      auto foo2(std::move(foo));
      BOOST_CHECK(false);
    }
    catch(const std::logic_error &e)
    {
      BOOST_CHECK(!strcmp(e.what(), "move"));
    }
    catch(...)
    {
      BOOST_CHECK(false);
    }
    BOOST_CHECK("niall" == foo.value().a);  // NOLINT
    // Does throwing during copy assignment work?
    {
      outcome<udt> foo2(in_place_type<udt>, "douglas");
      try
      {
        foo2 = foo;
        BOOST_CHECK(false);
      }
      catch(const std::logic_error &e)
      {
        BOOST_CHECK(!strcmp(e.what(), "copy"));
        BOOST_CHECK(foo2.value().a == "douglas");
      }
      catch(...)
      {
        BOOST_CHECK(false);
      }
      BOOST_CHECK("niall" == foo.value().a);
    }
    // Does throwing during move assignment work?
    {
      outcome<udt> foo2(in_place_type<udt>, "douglas");
      try
      {
        foo2 = std::move(foo);
        BOOST_CHECK(false);
      }
      catch(const std::logic_error &e)
      {
        BOOST_CHECK(!strcmp(e.what(), "move"));
        BOOST_CHECK(foo2.value().a == "douglas");
      }
      catch(...)
      {
        BOOST_CHECK(false);
      }
      BOOST_CHECK("niall" == foo.value().a);  // NOLINT
    }
  }
#endif
}