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//===----------------------------------------------------------------------===//
//
// The LLVM Compiler Infrastructure
//
// This file is dual licensed under the MIT and the University of Illinois Open
// Source Licenses. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
// UNSUPPORTED: c++98, c++03
// <experimental/filesystem>
// class directory_iterator
// directory_iterator& operator++();
// directory_iterator& increment(error_code& ec) noexcept;
#include <experimental/filesystem>
#include <type_traits>
#include <set>
#include <cassert>
#include "test_macros.h"
#include "rapid-cxx-test.hpp"
#include "filesystem_test_helper.hpp"
#include <iostream>
using namespace std::experimental::filesystem;
TEST_SUITE(directory_iterator_increment_tests)
TEST_CASE(test_increment_signatures)
{
using D = directory_iterator;
directory_iterator d; ((void)d);
std::error_code ec; ((void)ec);
ASSERT_SAME_TYPE(decltype(++d), directory_iterator&);
ASSERT_NOT_NOEXCEPT(++d);
ASSERT_SAME_TYPE(decltype(d.increment(ec)), directory_iterator&);
ASSERT_NOEXCEPT(d.increment(ec));
}
TEST_CASE(test_prefix_increment)
{
const path testDir = StaticEnv::Dir;
const std::set<path> dir_contents(std::begin(StaticEnv::DirIterationList),
std::end( StaticEnv::DirIterationList));
const directory_iterator endIt{};
std::error_code ec;
directory_iterator it(testDir, ec);
TEST_REQUIRE(!ec);
std::set<path> unseen_entries = dir_contents;
while (!unseen_entries.empty()) {
TEST_REQUIRE(it != endIt);
const path entry = *it;
TEST_REQUIRE(unseen_entries.erase(entry) == 1);
directory_iterator& it_ref = ++it;
TEST_CHECK(&it_ref == &it);
}
TEST_CHECK(it == endIt);
}
TEST_CASE(test_postfix_increment)
{
const path testDir = StaticEnv::Dir;
const std::set<path> dir_contents(std::begin(StaticEnv::DirIterationList),
std::end( StaticEnv::DirIterationList));
const directory_iterator endIt{};
std::error_code ec;
directory_iterator it(testDir, ec);
TEST_REQUIRE(!ec);
std::set<path> unseen_entries = dir_contents;
while (!unseen_entries.empty()) {
TEST_REQUIRE(it != endIt);
const path entry = *it;
TEST_REQUIRE(unseen_entries.erase(entry) == 1);
const path entry2 = *it++;
TEST_CHECK(entry2 == entry);
}
TEST_CHECK(it == endIt);
}
TEST_CASE(test_increment_method)
{
const path testDir = StaticEnv::Dir;
const std::set<path> dir_contents(std::begin(StaticEnv::DirIterationList),
std::end( StaticEnv::DirIterationList));
const directory_iterator endIt{};
std::error_code ec;
directory_iterator it(testDir, ec);
TEST_REQUIRE(!ec);
std::set<path> unseen_entries = dir_contents;
while (!unseen_entries.empty()) {
TEST_REQUIRE(it != endIt);
const path entry = *it;
TEST_REQUIRE(unseen_entries.erase(entry) == 1);
directory_iterator& it_ref = it.increment(ec);
TEST_REQUIRE(!ec);
TEST_CHECK(&it_ref == &it);
}
TEST_CHECK(it == endIt);
}
TEST_SUITE_END()
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