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// what: unit tests for variant type boost::any
// who: contributed by Kevlin Henney
// when: July 2001
// where: tested with BCC 5.5, MSVC 6.0, and g++ 2.95
#include <cstdlib>
#include <string>
#include <utility>
#include "boost/any.hpp"
#include "test.hpp"
namespace any_tests
{
typedef test<const char *, void (*)()> test_case;
typedef const test_case * test_case_iterator;
extern const test_case_iterator begin, end;
}
int main()
{
using namespace any_tests;
tester<test_case_iterator> test_suite(begin, end);
return test_suite() ? EXIT_SUCCESS : EXIT_FAILURE;
}
namespace any_tests // test suite
{
void test_default_ctor();
void test_converting_ctor();
void test_copy_ctor();
void test_copy_assign();
void test_converting_assign();
void test_bad_cast();
void test_swap();
void test_null_copying();
void test_cast_to_reference();
const test_case test_cases[] =
{
{ "default construction", test_default_ctor },
{ "single argument construction", test_converting_ctor },
{ "copy construction", test_copy_ctor },
{ "copy assignment operator", test_copy_assign },
{ "converting assignment operator", test_converting_assign },
{ "failed custom keyword cast", test_bad_cast },
{ "swap member function", test_swap },
{ "copying operations on a null", test_null_copying },
{ "cast to reference types", test_cast_to_reference }
};
const test_case_iterator begin = test_cases;
const test_case_iterator end =
test_cases + (sizeof test_cases / sizeof *test_cases);
}
namespace any_tests // test definitions
{
using namespace boost;
void test_default_ctor()
{
const any value;
check_true(value.empty(), "empty");
check_null(any_cast<int>(&value), "any_cast<int>");
check_equal(value.type(), typeid(void), "type");
}
void test_converting_ctor()
{
std::string text = "test message";
any value = text;
check_false(value.empty(), "empty");
check_equal(value.type(), typeid(std::string), "type");
check_null(any_cast<int>(&value), "any_cast<int>");
check_non_null(any_cast<std::string>(&value), "any_cast<std::string>");
check_equal(
any_cast<std::string>(value), text,
"comparing cast copy against original text");
check_unequal(
any_cast<std::string>(&value), &text,
"comparing address in copy against original text");
}
void test_copy_ctor()
{
std::string text = "test message";
any original = text, copy = original;
check_false(copy.empty(), "empty");
check_equal(original.type(), copy.type(), "type");
check_equal(
any_cast<std::string>(original), any_cast<std::string>(copy),
"comparing cast copy against original");
check_equal(
text, any_cast<std::string>(copy),
"comparing cast copy against original text");
check_unequal(
any_cast<std::string>(&original),
any_cast<std::string>(©),
"comparing address in copy against original");
}
void test_copy_assign()
{
std::string text = "test message";
any original = text, copy;
any * assign_result = &(copy = original);
check_false(copy.empty(), "empty");
check_equal(original.type(), copy.type(), "type");
check_equal(
any_cast<std::string>(original), any_cast<std::string>(copy),
"comparing cast copy against cast original");
check_equal(
text, any_cast<std::string>(copy),
"comparing cast copy against original text");
check_unequal(
any_cast<std::string>(&original),
any_cast<std::string>(©),
"comparing address in copy against original");
check_equal(assign_result, ©, "address of assignment result");
}
void test_converting_assign()
{
std::string text = "test message";
any value;
any * assign_result = &(value = text);
check_false(value.empty(), "type");
check_equal(value.type(), typeid(std::string), "type");
check_null(any_cast<int>(&value), "any_cast<int>");
check_non_null(any_cast<std::string>(&value), "any_cast<std::string>");
check_equal(
any_cast<std::string>(value), text,
"comparing cast copy against original text");
check_unequal(
any_cast<std::string>(&value),
&text,
"comparing address in copy against original text");
check_equal(assign_result, &value, "address of assignment result");
}
void test_bad_cast()
{
std::string text = "test message";
any value = text;
TEST_CHECK_THROW(
any_cast<const char *>(value),
bad_any_cast,
"any_cast to incorrect type");
}
void test_swap()
{
std::string text = "test message";
any original = text, swapped;
std::string * original_ptr = any_cast<std::string>(&original);
any * swap_result = &original.swap(swapped);
check_true(original.empty(), "empty on original");
check_false(swapped.empty(), "empty on swapped");
check_equal(swapped.type(), typeid(std::string), "type");
check_equal(
text, any_cast<std::string>(swapped),
"comparing swapped copy against original text");
check_non_null(original_ptr, "address in pre-swapped original");
check_equal(
original_ptr,
any_cast<std::string>(&swapped),
"comparing address in swapped against original");
check_equal(swap_result, &original, "address of swap result");
}
void test_null_copying()
{
const any null;
any copied = null, assigned;
assigned = null;
check_true(null.empty(), "empty on null");
check_true(copied.empty(), "empty on copied");
check_true(assigned.empty(), "empty on copied");
}
void test_cast_to_reference()
{
any a(137);
const any b(a);
int & ra = any_cast<int &>(a);
int const & ra_c = any_cast<int const &>(a);
int volatile & ra_v = any_cast<int volatile &>(a);
int const volatile & ra_cv = any_cast<int const volatile&>(a);
check_true(
&ra == &ra_c && &ra == &ra_v && &ra == &ra_cv,
"cv references to same obj");
int const & rb_c = any_cast<int const &>(b);
int const volatile & rb_cv = any_cast<int const volatile &>(b);
check_true(&rb_c == &rb_cv, "cv references to copied const obj");
check_true(&ra != &rb_c, "copies hold different objects");
++ra;
int incremented = any_cast<int>(a);
check_true(incremented == 138, "increment by reference changes value");
TEST_CHECK_THROW(
any_cast<char &>(a),
bad_any_cast,
"any_cast to incorrect reference type");
TEST_CHECK_THROW(
any_cast<const char &>(b),
bad_any_cast,
"any_cast to incorrect const reference type");
}
}
// Copyright Kevlin Henney, 2000, 2001. All rights reserved.
//
// Distributed under the Boost Software License, Version 1.0. (See
// accompanying file LICENSE_1_0.txt or copy at
// http://www.boost.org/LICENSE_1_0.txt)
//
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