Louis Dionne 6e1dcc9335 [libc++] Refactor string unit tests to ease addition of new allocators
While doing this, I also found a few tests that were either clearly
incorrect (e.g. testing the wrong function) or that lacked basic test
coverage like testing std::string itself (e.g. the test was only checking
std::basic_string with a custom allocator). In these cases, I did a few
conservative drive-by changes.

Differential Revision: https://reviews.llvm.org/D140550
Co-authored-by: Brendan Emery <brendan.emery@esrlabs.com>
2023-09-27 09:01:58 -04:00

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//===----------------------------------------------------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
// UNSUPPORTED: c++03, c++11, c++14, c++17
// <string>
// constexpr bool ends_with(charT x) const noexcept;
#include <string>
#include <cassert>
#include "test_macros.h"
template <class S>
constexpr void test_string() {
S s1{};
S s2{"abcde", 5};
ASSERT_NOEXCEPT(s1.ends_with('e'));
assert(!s1.ends_with('e'));
assert(!s1.ends_with('x'));
assert(s2.ends_with('e'));
assert(!s2.ends_with('x'));
}
constexpr bool test() {
test_string<std::string>();
return true;
}
int main(int, char**) {
test();
static_assert(test());
return 0;
}