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https://github.com/google/sandboxed-api.git
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dbaf95c724
This change should make it less confusing where utility code comes from. Having it in two places made sense when we were debating whether to publish Sandbox2 separately, but not any longer. Follow-up changes will move `sandbox2/util.h` and rename the remaining `sandbox2/util` folder. PiperOrigin-RevId: 351601640 Change-Id: I6256845261f610e590c25e2c59851cc51da2d778
82 lines
2.3 KiB
C++
82 lines
2.3 KiB
C++
// Copyright 2019 Google LLC
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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/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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namespace sapi {
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namespace {
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using ::testing::Eq;
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using ::testing::StrEq;
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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 sapi
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