71 lines
2.1 KiB
C++
71 lines
2.1 KiB
C++
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// 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(100), 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(100), 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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