7149bb7068
The libc++ test suite has a lot of old Lit features used to XFAIL tests and mark them as UNSUPPORTED. Many of them are to workaround problems on old compilers or old platforms. As time goes by, it is good to go and clean those up to simplify the configuration of the test suite, and also to reflect the testing reality. It's not useful to have markup that gives the impression that e.g. clang-3.3 is supported, when we don't really test on it anymore (and hence several new tests probably don't have the necessary markup on them).
103 lines
2.5 KiB
C++
103 lines
2.5 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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// See bugs.llvm.org/PR20183
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//
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// XFAIL: with_system_cxx_lib=macosx10.11
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// XFAIL: with_system_cxx_lib=macosx10.10
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// XFAIL: with_system_cxx_lib=macosx10.9
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// <random>
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// class random_device;
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// explicit random_device(const string& token = implementation-defined);
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// For the following ctors, the standard states: "The semantics and default
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// value of the token parameter are implementation-defined". Implementations
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// therefore aren't required to accept any string, but the default shouldn't
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// throw.
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#include <random>
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#include <system_error>
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#include <cassert>
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#if !defined(_WIN32)
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#include <unistd.h>
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#endif
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#include "test_macros.h"
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bool is_valid_random_device(const std::string &token) {
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#if defined(_LIBCPP_USING_DEV_RANDOM)
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// Not an exhaustive list: they're the only tokens that are tested below.
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return token == "/dev/urandom" || token == "/dev/random";
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#else
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return token == "/dev/urandom";
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#endif
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}
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void check_random_device_valid(const std::string &token) {
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std::random_device r(token);
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}
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void check_random_device_invalid(const std::string &token) {
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#ifndef TEST_HAS_NO_EXCEPTIONS
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try {
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std::random_device r(token);
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LIBCPP_ASSERT(false);
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} catch (const std::system_error&) {
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}
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#else
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((void)token);
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#endif
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}
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int main(int, char**) {
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{
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std::random_device r;
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}
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{
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std::string token = "wrong file";
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check_random_device_invalid(token);
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}
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{
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std::string token = "/dev/urandom";
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if (is_valid_random_device(token))
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check_random_device_valid(token);
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else
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check_random_device_invalid(token);
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}
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{
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std::string token = "/dev/random";
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if (is_valid_random_device(token))
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check_random_device_valid(token);
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else
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check_random_device_invalid(token);
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}
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#if !defined(_WIN32)
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// Test that random_device(const string&) properly handles getting
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// a file descriptor with the value '0'. Do this by closing the standard
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// streams so that the descriptor '0' is available.
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{
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int ec;
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ec = close(STDIN_FILENO);
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assert(!ec);
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ec = close(STDOUT_FILENO);
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assert(!ec);
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ec = close(STDERR_FILENO);
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assert(!ec);
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std::random_device r;
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}
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#endif // !defined(_WIN32)
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return 0;
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}
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