Keep only base/extractor.[cc|h].

base/timer_unittest.cc

-// Copyright 2003-2009 Google Inc.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-// ========================================================================
-//
-// Timer unittest
-
-#include <cmath>
-#include "omaha/base/time.h"
-#include "omaha/base/timer.h"
-#include "omaha/testing/unit_test.h"
-
-namespace omaha {
-
-// The accuracy of the unit test measurements is expected to be within 50 ms.
-// The error varies depending on how the unit test process gets scheduled.
-// The timer test is prone to failing when run by Pulse. Consider diabling the
-// test completely.
-const int kErrorMs = 50;
-
-// The tests that use the Timer class are flaky (see warning in timer.h),
-// and Timer isn't used in production Omaha code, so we leave out everything
-// but the LowResTimer test.
-// TODO(omaha): Is there a better way to do this? Maybe not run on build system?
-#if 0
-
-class TimerTest : public testing::Test {
- protected:
-  // Set up a test so that we can measure the same time interval using the
-  // low and high resolution timers. If the difference between them is too
-  // big then we consider that the high resolution time is busted and we
-  // stop running the unit tests.
-  // The high resolution timer may have undefined behavior, see the header
-  // file for more comments.
-  static void SetUpTestCase() {
-    const int kSleepMs = 100;
-    const int kDiffMs = 1;
-    LowResTimer t(false);
-    Timer u(false);
-    t.Start();
-    u.Start();
-    ::Sleep(kSleepMs);
-    busted_ = abs(t.GetMilliseconds()- u.GetMilliseconds()) >= kErrorMs;
-  }
-
-  void PrintError() {
-    // This is going to print "Test Foo is busted but passed."
-    printf("is busted but ");
-  }
-
-  static bool busted_;
-};
-
-bool TimerTest::busted_ = false;
-
-#endif  // #if 0
-
-TEST(TimerTest, LowResTimer) {
-  // This test was flaky on the build machine.
-  // TODO(omaha): Is this still the case? Can we improve the test?
-  if (omaha::IsBuildSystem()) {
-    return;
-  }
-
-  LowResTimer t(false);
-
-  const int kSleep1 = 100;
-  t.Start();
-  ::Sleep(kSleep1);
-  uint32 elapsedMs = t.Stop();
-
-  // For the first run of the timer the elapsed value must be equal to
-  // the timer interval.
-  EXPECT_EQ(elapsedMs, t.GetMilliseconds());
-
-  // About 100 ms now.
-  EXPECT_NEAR(kSleep1, elapsedMs, kErrorMs);
-
-  // Test the accessors of different time units.
-  EXPECT_DOUBLE_EQ(t.GetSeconds() * 1000, t.GetMilliseconds());
-
-  const int kSleep2 = 10;
-  t.Start();
-  ::Sleep(kSleep2);
-  elapsedMs = t.Stop();
-  EXPECT_NEAR(kSleep2, elapsedMs, kErrorMs);
-
-  // About 110 ms now.
-  EXPECT_NEAR(kSleep1 + kSleep2, t.GetMilliseconds(), 2 * kErrorMs);
-
-  const int kSleep3 = 50;
-  t.Start();
-  ::Sleep(kSleep3);
-  elapsedMs = t.Stop();
-  EXPECT_NEAR(kSleep3, elapsedMs, kErrorMs);
-
-  // About 160 ms now.
-  EXPECT_NEAR(kSleep1 + kSleep2 + kSleep3, t.GetMilliseconds(), 3 * kErrorMs);
-
-  t.Reset();
-  EXPECT_EQ(0, t.GetMilliseconds());
-}
-
-// Tests disabled, see comment at top of file.
-#if 0
-// Test that values from RTDSC change quickly.
-TEST_F(TimerTest, RTDSC) {
-  uint32 last = 0;
-  for (int i = 0; i < 10; ++i) {
-    uint64 counter = Timer::GetRdtscCounter();
-    uint32 a = *(reinterpret_cast<uint32 *>(&counter));
-    ASSERT_NE(a, last);
-    last = a;
-  }
-}
-
-// Compare everything as ms units for uniformity.
-
-TEST_F(TimerTest, Timer) {
-  if (busted_) {
-    PrintError();
-    return;
-  }
-
-  Timer t(false);
-
-  const int kSleep1 = 100;
-  t.Start();
-  ::Sleep(kSleep1);
-  time64 elapsed = t.Stop();
-
-  // For the first run of the timer the elapsed value must be equal to
-  // the timer interval.
-  EXPECT_DOUBLE_EQ(t.PerfCountToNanoSeconds(elapsed) / 1000000,
-                   t.GetNanoseconds() / 1000000);
-
-  // About 100 ms now.
-  EXPECT_NEAR(kSleep1, t.PerfCountToNanoSeconds(elapsed) / 1000000, kErrorMs);
-
-  // Test the accessors of different time units.
-  EXPECT_DOUBLE_EQ(t.GetSeconds() * 1000, t.GetMilliseconds());
-  EXPECT_DOUBLE_EQ(t.GetMilliseconds() * 1000, t.GetMicroseconds());
-  EXPECT_DOUBLE_EQ(t.GetMicroseconds() * 1000, t.GetNanoseconds());
-
-  EXPECT_NEAR(t.Get100Nanoseconds() * 100.0, t.GetNanoseconds(), 100);
-
-  const int kSleep2 = 10;
-  t.Start();
-  ::Sleep(kSleep2);
-  elapsed = t.Stop();
-  EXPECT_NEAR(kSleep2, t.PerfCountToNanoSeconds(elapsed) / 1000000, kErrorMs);
-
-  // About 110 ms now.
-  EXPECT_NEAR(kSleep1 + kSleep2, t.GetMilliseconds(), 2 * kErrorMs);
-
-  const int kSleep3 = 50;
-  t.Start();
-  ::Sleep(kSleep3);
-  elapsed = t.Stop();
-  EXPECT_NEAR(kSleep3, t.PerfCountToNanoSeconds(elapsed) / 1000000, kErrorMs);
-
-  // About 160 ms now.
-  EXPECT_NEAR(kSleep1 + kSleep2 + kSleep3, t.GetMilliseconds(), 3 * kErrorMs);
-
-  t.Reset();
-  EXPECT_DOUBLE_EQ(0, t.GetMilliseconds());
-}
-
-TEST_F(TimerTest, TimerSplit) {
-  if (busted_) {
-    PrintError();
-    return;
-  }
-
-  const int kSleep1 = 50;
-  const int kSleep2 = 125;
-  const int kSleep3 = 25;
-
-  double split1(0), split2(0), split3(0);
-  double elapsed1(0), elapsed2(0);
-
-  Timer t(false);
-  t.Start();
-  ::Sleep(kSleep1);
-  t.Split(&split1, &elapsed1);
-  EXPECT_NEAR(split1, kSleep1, kErrorMs);
-  EXPECT_NEAR(elapsed1, kSleep1, kErrorMs);
-  EXPECT_DOUBLE_EQ(split1, elapsed1);
-
-  ::Sleep(kSleep2);
-  t.Split(&split2, &elapsed2);
-  EXPECT_NEAR(split2, kSleep2, kErrorMs);
-  EXPECT_DOUBLE_EQ(split1 + split2, elapsed2);
-
-  ::Sleep(kSleep3);
-  t.Split(&split3, NULL);
-  t.Stop();
-  EXPECT_NEAR(split3, kSleep3, kErrorMs);
-  EXPECT_NEAR(split1 + split2 + split3, t.GetMilliseconds(), kErrorMs);
-}
-
-// Time QueryPerformanceCounter
-TEST_F(TimerTest, QueryPerformanceCounter) {
-  if (busted_) {
-    PrintError();
-    return;
-  }
-
-  Timer t(false);
-  t.Start();
-
-  const int kIterations = 100;
-  LARGE_INTEGER count = {0};
-  for (int i = 0; i < kIterations; i++) {
-    ASSERT_TRUE(::QueryPerformanceCounter(&count));
-  }
-
-  t.Stop();
-
-  // Expect the call to take anywhere up to 1000 nano seconds.
-  EXPECT_NEAR(t.GetNanoseconds() / kIterations, 500, 500);
-}
-#endif  // #if 0
-
-}  // namespace omaha