ContainerMeta_test.cc File Reference

Unit test for some of the utilities in ContainerMeta.h More...

#include <boost/test/unit_test.hpp>
#include "larcorealg/CoreUtils/ContainerMeta.h"
#include <list>
#include <memory>
#include <functional>
#include <type_traits>

Go to the source code of this file.

Classes
struct	O

Macros
#define	BOOST_TEST_MODULE   ( ContainerMeta_test )

Functions
void	make_collection_reference_test ()
void	collection_from_reference_test ()
	BOOST_AUTO_TEST_CASE (CollectionReferenceTestCase)

Detailed Description

Unit test for some of the utilities in ContainerMeta.h

Author

Gianluca Petrillo (petri.nosp@m.llo@.nosp@m.fnal..nosp@m.gov)

Date

March 25, 2019

See Also

larcorealg/CoreUtils/ContainerMeta.h

Definition in file ContainerMeta_test.cc.

Macro Definition Documentation

#define BOOST_TEST_MODULE   ( ContainerMeta_test )

Definition at line 10 of file ContainerMeta_test.cc.

Function Documentation

BOOST_AUTO_TEST_CASE

(

CollectionReferenceTestCase

)

Definition at line 253 of file ContainerMeta_test.cc.

                                                  {
  make_collection_reference_test();
  collection_from_reference_test();
} // BOOST_AUTO_TEST_CASE(CollectionReferenceTestCase)

void collection_from_reference_test

(

)

Definition at line 182 of file ContainerMeta_test.cc.

                                      {

  constexpr std::size_t Size = 10U;

  // BUG the double brace syntax is required to work around clang bug 21629
  // (https://bugs.llvm.org/show_bug.cgi?id=21629)
  std::list<O>        list        {{ O{} }};
  std::list<O>      & ref         = list;
  std::list<O> const& cref        = list;
  auto                refw        = std::ref(list);
  auto                crefw       = std::cref(list);

  O                   array       [Size];
  O*                  ptr         = array;
  O const*            cptr        = ptr;

  auto const          uptr        = std::unique_ptr<O>(new O[Size]);
  auto                array_uptr  = std::unique_ptr<O[Size]>();
  auto const          array_uptrc = std::unique_ptr<O[Size]>();
  auto                garray_uptr = std::unique_ptr<O[]>(new O[Size]);

  static_assert(std::is_same_v<util::collection_from_reference_t<decltype(list       )>, decltype(ref )>);
  static_assert(std::is_same_v<util::collection_from_reference_t<decltype(ref        )>, decltype(ref )>);
  static_assert(std::is_same_v<util::collection_from_reference_t<decltype(cref       )>, decltype(cref)>);
  static_assert(std::is_same_v<util::collection_from_reference_t<decltype(refw       )>, decltype(ref )>);
  static_assert(std::is_same_v<util::collection_from_reference_t<decltype(crefw      )>, decltype(cref)>);

  static_assert(std::is_same_v<util::collection_from_reference_t<decltype(array      )>, O      *      >);
  static_assert(std::is_same_v<util::collection_from_reference_t<decltype(ptr        )>, O      *      >);
  static_assert(std::is_same_v<util::collection_from_reference_t<decltype(cptr       )>, O const*      >);

  static_assert(std::is_same_v<util::collection_from_reference_t<decltype(uptr       )>, O      *     >);
  static_assert(std::is_same_v<util::collection_from_reference_t<decltype(array_uptr )>, O(*)[Size]   >);
  static_assert(std::is_same_v<util::collection_from_reference_t<decltype(array_uptrc)>, O(*)[Size]   >);
  static_assert(std::is_same_v<util::collection_from_reference_t<decltype(garray_uptr)>, O      *     >);

  static_assert(std::is_same_v<decltype(util::collection_from_reference(list       )), decltype(ref )>);
  static_assert(std::is_same_v<decltype(util::collection_from_reference(ref        )), decltype(ref )>);
  static_assert(std::is_same_v<decltype(util::collection_from_reference(cref       )), decltype(cref)>);
  static_assert(std::is_same_v<decltype(util::collection_from_reference(refw       )), decltype(ref )>);
  static_assert(std::is_same_v<decltype(util::collection_from_reference(crefw      )), decltype(cref)>);

  static_assert(std::is_same_v<decltype(util::collection_from_reference(array      )), O      *      >);
  static_assert(std::is_same_v<decltype(util::collection_from_reference(ptr        )), O      *      >);
  static_assert(std::is_same_v<decltype(util::collection_from_reference(cptr       )), O const*      >);

  static_assert(std::is_same_v<decltype(util::collection_from_reference(uptr       )), O      *     >);
  static_assert(std::is_same_v<decltype(util::collection_from_reference(array_uptr )), O(*)[Size]   >);
  static_assert(std::is_same_v<decltype(util::collection_from_reference(array_uptrc)), O(*)[Size]   >);
  static_assert(std::is_same_v<decltype(util::collection_from_reference(garray_uptr)), O      *     >);

  BOOST_TEST(&util::collection_from_reference(list       ) == &list            );
  BOOST_TEST(&util::collection_from_reference(ref        ) == &list            );
  BOOST_TEST(&util::collection_from_reference(cref       ) == &list            );
  BOOST_TEST(&util::collection_from_reference(refw       ) == &list            );
  BOOST_TEST(&util::collection_from_reference(crefw      ) == &list            );

  BOOST_TEST( util::collection_from_reference(array      ) == array            );
  BOOST_TEST( util::collection_from_reference(ptr        ) == ptr              );
  BOOST_TEST( util::collection_from_reference(cptr       ) == cptr             );

  BOOST_TEST( util::collection_from_reference(uptr       ) == uptr.get()       );
  BOOST_TEST( util::collection_from_reference(array_uptr ) == array_uptr.get() );
  BOOST_TEST( util::collection_from_reference(array_uptrc) == array_uptrc.get());
  BOOST_TEST( util::collection_from_reference(garray_uptr) == garray_uptr.get());

} // collection_from_reference_test()

void make_collection_reference_test

(

)

Definition at line 131 of file ContainerMeta_test.cc.

                                      {

  /*
   * `std::unique_ptr<T[N]>` is a strange beast which really deals with pointers
   * to whole C arrays (`T(*)[N]`).
   * It should be understood that this is not the same as `T*`
   */
  constexpr std::size_t Size = 10U;

  // BUG the double brace syntax is required to work around clang bug 21629
  // (https://bugs.llvm.org/show_bug.cgi?id=21629)
  std::list<O>    list        {{ O{} }};
  O               array       [Size];
  O*              ptr         = array;
  O const*        cptr        = ptr;
  O const* const  cptrc       = ptr;
  O const* const& cptrcr      = cptrc;
  auto            refw        = std::ref(list);
  auto            crefw       = std::cref(list);
  auto const      uptr        = std::unique_ptr<O>(new O[Size]);
  auto            array_uptr  = std::unique_ptr<O[Size]>();
  auto            garray_uptr = std::unique_ptr<O[]>(new O[Size]);

  static_assert(std::is_same_v<decltype(util::make_collection_reference(list       )), decltype(std::ref(list))>);
  static_assert(std::is_same_v<decltype(util::make_collection_reference(array      )), decltype(ptr           )>);
  static_assert(std::is_same_v<decltype(util::make_collection_reference(ptr        )), decltype(ptr           )>);
  static_assert(std::is_same_v<decltype(util::make_collection_reference(cptr       )), decltype(cptr          )>);
  static_assert(std::is_same_v<decltype(util::make_collection_reference(cptrc      )), decltype(cptr          )>);
  static_assert(std::is_same_v<decltype(util::make_collection_reference(cptrcr     )), decltype(cptr          )>);
  static_assert(std::is_same_v<decltype(util::make_collection_reference(refw       )), decltype(refw          )>);
  static_assert(std::is_same_v<decltype(util::make_collection_reference(crefw      )), decltype(crefw         )>);
  static_assert(std::is_same_v<decltype(util::make_collection_reference(uptr       )), decltype(ptr           )>);
  static_assert(std::is_same_v<decltype(util::make_collection_reference(array_uptr )), decltype(&array        )>);
  static_assert(std::is_same_v<decltype(util::make_collection_reference(garray_uptr)), decltype(ptr           )>);

  BOOST_TEST(&(util::make_collection_reference(list       ).get().front()) == &list.front()      );
  BOOST_TEST(&(util::make_collection_reference(array      )[0]           ) == &array[0]          );
  BOOST_TEST(&(util::make_collection_reference(ptr        )[0]           ) ==  ptr               );
  BOOST_TEST(&(util::make_collection_reference(cptr       )[0]           ) ==  cptr              );
  BOOST_TEST(&(util::make_collection_reference(cptrc      )[0]           ) ==  cptr              );
  BOOST_TEST(&(util::make_collection_reference(cptrcr     )[0]           ) ==  cptr              );
  BOOST_TEST(&(util::make_collection_reference(refw       ).get().front()) == &list.front()      );
  BOOST_TEST(&(util::make_collection_reference(crefw      ).get().front()) == &list.front()      );
  BOOST_TEST(&(util::make_collection_reference(uptr       )[0]           ) ==  uptr.get()        );
  BOOST_TEST(&(util::make_collection_reference(array_uptr )[0]           ) ==  array_uptr.get()  );
  BOOST_TEST(&(util::make_collection_reference(garray_uptr)[0]           ) ==  garray_uptr.get() );

} // make_collection_reference_test()