mirror of
https://github.com/google/sandboxed-api.git
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82 lines
2.4 KiB
C++
82 lines
2.4 KiB
C++
// Copyright 2019 Google LLC. All Rights Reserved.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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#include "sandboxed_api/sandbox2/util/strerror.h"
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#include <atomic>
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#include <cerrno>
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#include <string>
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#include <thread> // NOLINT(build/c++11)
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#include <vector>
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#include "gmock/gmock.h"
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#include "gtest/gtest.h"
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#include "absl/strings/match.h"
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using ::testing::Eq;
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using ::testing::StrEq;
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namespace sandbox2 {
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namespace {
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TEST(StrErrorTest, ValidErrorCode) {
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errno = EAGAIN;
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EXPECT_THAT(StrError(EINTR), StrEq(strerror(EINTR)));
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EXPECT_THAT(errno, Eq(EAGAIN));
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}
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TEST(StrErrorTest, InvalidErrorCode) {
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errno = EBUSY;
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EXPECT_THAT(StrError(-1), StrEq("Unknown error -1"));
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EXPECT_THAT(errno, Eq(EBUSY));
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}
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TEST(StrErrorTest, MultipleThreads) {
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// In this test, we will start up 2 threads and have each one call StrError
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// 1000 times, each time with a different errnum. We expect that
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// StrError(errnum) will return a string equal to the one returned by
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// strerror(errnum), if the code is known. Since strerror is known to be
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// thread-hostile, collect all the expected strings up front.
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constexpr int kNumCodes = 1000;
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std::vector<std::string> expected_strings(kNumCodes);
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for (int i = 0; i < kNumCodes; ++i) {
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expected_strings[i] = strerror(i);
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}
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std::atomic<int> counter{0};
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auto thread_fun = [&counter, &expected_strings]() {
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for (int i = 0; i < kNumCodes; ++i) {
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++counter;
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std::string value = StrError(i);
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if (!absl::StartsWith(value, "Unknown error ")) {
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EXPECT_THAT(StrError(i), StrEq(expected_strings[i]));
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}
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}
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};
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constexpr int kNumThreads = 100;
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std::vector<std::thread> threads;
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for (int i = 0; i < kNumThreads; ++i) {
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threads.push_back(std::thread(thread_fun));
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}
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for (auto& thread : threads) {
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thread.join();
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}
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EXPECT_THAT(counter, Eq(kNumThreads * kNumCodes));
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}
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} // namespace
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} // namespace sandbox2
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