libcxx/test/std/strings/basic.string/string.contains/contains.string_view.pass.cpp

//===----------------------------------------------------------------------===//
//
// 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, c++20

// <string>

// constexpr bool contains(basic_string_view x) const noexcept;

#include <string>
#include <cassert>

#include "test_macros.h"

template <class CharT, template <class> class Alloc>
constexpr void test_string() {
  using S  = std::basic_string<CharT, std::char_traits<CharT>, Alloc<CharT> >;
  using SV = std::basic_string_view< CharT, std::char_traits<CharT> >;

  const char* s = "abcde";
  S s0;
  S s1{s + 1, 1};
  S s3{s + 1, 3};
  S s5{s, 5};
  S sNot{"xyz", 3};

  SV sv0;
  SV sv1{s + 1, 1};
  SV sv2{s + 1, 2};
  SV sv3{s + 1, 3};
  SV sv4{s + 1, 4};
  SV sv5{s, 5};
  SV svNot{"xyz", 3};
  SV svNot2{"bd", 2};
  SV svNot3{"dcb", 3};

  ASSERT_NOEXCEPT(s0.contains(sv0));

  assert(s0.contains(sv0));
  assert(!s0.contains(sv1));

  assert(s1.contains(sv0));
  assert(s1.contains(sv1));
  assert(!s1.contains(sv2));
  assert(!s1.contains(sv3));
  assert(!s1.contains(sv4));
  assert(!s1.contains(sv5));
  assert(!s1.contains(svNot));
  assert(!s1.contains(svNot2));
  assert(!s1.contains(svNot3));

  assert(s3.contains(sv0));
  assert(s3.contains(sv1));
  assert(s3.contains(sv2));
  assert(s3.contains(sv3));
  assert(!s3.contains(sv4));
  assert(!s3.contains(sv5));
  assert(!s3.contains(svNot));
  assert(!s3.contains(svNot2));
  assert(!s3.contains(svNot3));

  assert(s5.contains(sv0));
  assert(s5.contains(sv1));
  assert(s5.contains(sv2));
  assert(s5.contains(sv3));
  assert(s5.contains(sv4));
  assert(s5.contains(sv5));
  assert(!s5.contains(svNot));
  assert(!s5.contains(svNot2));
  assert(!s5.contains(svNot3));

  assert(sNot.contains(sv0));
  assert(!sNot.contains(sv1));
  assert(!sNot.contains(sv2));
  assert(!sNot.contains(sv3));
  assert(!sNot.contains(sv4));
  assert(!sNot.contains(sv5));
  assert(sNot.contains(svNot));
  assert(!sNot.contains(svNot2));
  assert(!sNot.contains(svNot3));
}

constexpr bool test() {
  test_string<char, std::allocator>();

  return true;
}

int main(int, char**) {
  test();
  static_assert(test());

  return 0;
}