6e1dcc9335
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>
91 lines
2.1 KiB
C++
91 lines
2.1 KiB
C++
//===----------------------------------------------------------------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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// <string>
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// size_type capacity() const; // constexpr since C++20
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#include <string>
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#include <cassert>
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#include "test_allocator.h"
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#include "min_allocator.h"
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#include "test_macros.h"
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template <class S>
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TEST_CONSTEXPR_CXX20 void test_invariant(S s, test_allocator_statistics& alloc_stats) {
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alloc_stats.throw_after = 0;
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#ifndef TEST_HAS_NO_EXCEPTIONS
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try
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#endif
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{
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while (s.size() < s.capacity())
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s.push_back(typename S::value_type());
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assert(s.size() == s.capacity());
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}
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#ifndef TEST_HAS_NO_EXCEPTIONS
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catch (...) {
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assert(false);
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}
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#endif
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alloc_stats.throw_after = INT_MAX;
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}
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template <class Alloc>
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TEST_CONSTEXPR_CXX20 void test_string(const Alloc& a) {
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using S = std::basic_string<char, std::char_traits<char>, Alloc>;
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{
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S const s((Alloc(a)));
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assert(s.capacity() >= 0);
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}
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{
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S const s(3, 'x', Alloc(a));
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assert(s.capacity() >= 3);
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}
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#if TEST_STD_VER >= 11
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// Check that we perform SSO
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{
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S const s;
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assert(s.capacity() > 0);
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ASSERT_NOEXCEPT(s.capacity());
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}
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#endif
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}
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TEST_CONSTEXPR_CXX20 bool test() {
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test_string(std::allocator<char>());
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test_string(test_allocator<char>());
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test_string(test_allocator<char>(3));
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test_string(min_allocator<char>());
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{
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test_allocator_statistics alloc_stats;
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typedef std::basic_string<char, std::char_traits<char>, test_allocator<char> > S;
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S s((test_allocator<char>(&alloc_stats)));
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test_invariant(s, alloc_stats);
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s.assign(10, 'a');
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s.erase(5);
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test_invariant(s, alloc_stats);
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s.assign(100, 'a');
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s.erase(50);
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test_invariant(s, alloc_stats);
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}
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return true;
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}
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int main(int, char**) {
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test();
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#if TEST_STD_VER >= 20
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static_assert(test());
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#endif
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return 0;
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}
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