Abseil Common Libraries (C++) (grcp 依赖)
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70 lines
2.1 KiB
70 lines
2.1 KiB
// Copyright 2017 The Abseil Authors. |
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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 "absl/time/clock.h" |
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#include "absl/base/config.h" |
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#if defined(ABSL_HAVE_ALARM) |
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#include <signal.h> |
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#include <unistd.h> |
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#elif defined(__linux__) || defined(__APPLE__) |
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#error all known Linux and Apple targets have alarm |
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#endif |
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#include "gtest/gtest.h" |
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#include "absl/time/time.h" |
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namespace { |
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TEST(Time, Now) { |
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const absl::Time before = absl::FromUnixNanos(absl::GetCurrentTimeNanos()); |
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const absl::Time now = absl::Now(); |
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const absl::Time after = absl::FromUnixNanos(absl::GetCurrentTimeNanos()); |
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EXPECT_GE(now, before); |
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EXPECT_GE(after, now); |
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} |
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TEST(SleepForTest, BasicSanity) { |
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absl::Duration sleep_time = absl::Milliseconds(2500); |
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absl::Time start = absl::Now(); |
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absl::SleepFor(sleep_time); |
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absl::Time end = absl::Now(); |
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EXPECT_LE(sleep_time - absl::Milliseconds(100), end - start); |
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EXPECT_GE(sleep_time + absl::Milliseconds(200), end - start); |
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} |
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#ifdef ABSL_HAVE_ALARM |
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// Helper for test SleepFor. |
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bool alarm_handler_invoked = false; |
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void AlarmHandler(int signo) { |
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ASSERT_EQ(signo, SIGALRM); |
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alarm_handler_invoked = true; |
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} |
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TEST(SleepForTest, AlarmSupport) { |
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alarm_handler_invoked = false; |
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sig_t old_alarm = signal(SIGALRM, AlarmHandler); |
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alarm(2); |
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absl::Duration sleep_time = absl::Milliseconds(3500); |
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absl::Time start = absl::Now(); |
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absl::SleepFor(sleep_time); |
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absl::Time end = absl::Now(); |
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EXPECT_TRUE(alarm_handler_invoked); |
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EXPECT_LE(sleep_time - absl::Milliseconds(100), end - start); |
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EXPECT_GE(sleep_time + absl::Milliseconds(200), end - start); |
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signal(SIGALRM, old_alarm); |
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} |
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#endif // ABSL_HAVE_ALARM |
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} // namespace
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