GOAWAY open QUIC sessions if clock skew is detected

net/quic/chromium/quic_clock_skew_detector_test.cc

+// Copyright (c) 2012 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "net/quic/chromium/quic_clock_skew_detector.h"
+
+#include "net/quic/test_tools/mock_clock.h"
+#include "net/quic/test_tools/mock_random.h"
+#include "testing/gtest/include/gtest/gtest.h"
+
+namespace net {
+namespace test {
+namespace {
+
+class QuicClockSkewDetectorTest : public ::testing::Test {
+ protected:
+  QuicClockSkewDetectorTest()
+      : start_ticks_time_(base::TimeTicks::Now()),
+        start_wall_time_(base::Time::Now()),
+        detector_(start_ticks_time_, start_wall_time_) {}
+
+  base::TimeTicks start_ticks_time_;
+  base::Time start_wall_time_;
+  QuicClockSkewDetector detector_;
+};
+
+TEST_F(QuicClockSkewDetectorTest, NoChange) {
+  EXPECT_FALSE(
+      detector_.ClockSkewDetected(start_ticks_time_, start_wall_time_));
+}
+
+TEST_F(QuicClockSkewDetectorTest, NoOffset) {
+  base::TimeDelta delta = base::TimeDelta::FromSeconds(57);
+  EXPECT_FALSE(detector_.ClockSkewDetected(start_ticks_time_ + delta,
+                                           start_wall_time_ + delta));
+}
+
+TEST_F(QuicClockSkewDetectorTest, SmallOffset) {
+  base::TimeDelta delta = base::TimeDelta::FromMilliseconds(57);
+  EXPECT_FALSE(
+      detector_.ClockSkewDetected(start_ticks_time_, start_wall_time_ + delta));
+}
+
+TEST_F(QuicClockSkewDetectorTest, ManySmallOffset) {
+  for (int i = 0; i < 10; ++i) {
+    base::TimeDelta delta = base::TimeDelta::FromMilliseconds(500);
+    EXPECT_FALSE(detector_.ClockSkewDetected(start_ticks_time_,
+                                             start_wall_time_ + i * delta));
+  }
+}
+
+TEST_F(QuicClockSkewDetectorTest, LargeOffset) {
+  base::TimeDelta delta = base::TimeDelta::FromMilliseconds(1001);
+  EXPECT_TRUE(
+      detector_.ClockSkewDetected(start_ticks_time_, start_wall_time_ + delta));
+}
+
+TEST_F(QuicClockSkewDetectorTest, LargeOffsetThenSmallOffset) {
+  base::TimeDelta delta = base::TimeDelta::FromMilliseconds(1001);
+  EXPECT_TRUE(
+      detector_.ClockSkewDetected(start_ticks_time_, start_wall_time_ + delta));
+  base::TimeDelta small_delta = base::TimeDelta::FromMilliseconds(571001);
+  EXPECT_FALSE(detector_.ClockSkewDetected(
+      start_ticks_time_ + small_delta, start_wall_time_ + delta + small_delta));
+}
+
+}  // namespace
+}  // namespace test
+}  // namespace net