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// Copyright 2016 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 "chrome/browser/page_load_metrics/user_input_tracker.h"
#include "base/time/time.h"
#include "testing/gtest/include/gtest/gtest.h"
#include "third_party/WebKit/public/platform/WebInputEvent.h"
namespace page_load_metrics {
namespace {
// UserInputTracker allows events to be at most 2 seconds old. Thus we use
// 2100ms to make sure the age is greater than 2 seconds.
const int kTooOldMilliseconds = 2100;
double ToMonotonicallyIncreasingSeconds(base::TimeTicks t) {
return (t - base::TimeTicks()).InSecondsF();
}
class FakeInputEvent : public blink::WebInputEvent {
public:
FakeInputEvent(blink::WebInputEvent::Type type = blink::WebInputEvent::Char,
int modifiers = blink::WebInputEvent::NoModifiers)
: WebInputEvent(
sizeof(FakeInputEvent),
type,
modifiers,
ToMonotonicallyIncreasingSeconds(base::TimeTicks::Now())) {}
base::TimeTicks GetTimeStamp() {
return UserInputTracker::GetEventTime(*this);
}
base::TimeTicks GetTimeStampRounded() {
return UserInputTracker::RoundToRateLimitedOffset(GetTimeStamp());
}
};
} // namespace
class UserInputTrackerTest : public testing::Test {};
TEST_F(UserInputTrackerTest, Basic) {
UserInputTracker tracker;
EXPECT_EQ(base::TimeTicks(),
tracker.FindMostRecentUserInputEventBefore(base::TimeTicks()));
EXPECT_EQ(base::TimeTicks(),
tracker.FindMostRecentUserInputEventBefore(base::TimeTicks::Now()));
}
TEST_F(UserInputTrackerTest, SingleEvent) {
UserInputTracker tracker;
FakeInputEvent e;
tracker.OnInputEvent(e);
EXPECT_EQ(base::TimeTicks(), tracker.FindMostRecentUserInputEventBefore(
e.GetTimeStampRounded()));
base::TimeTicks after =
e.GetTimeStampRounded() + base::TimeDelta::FromMicroseconds(1);
EXPECT_EQ(e.GetTimeStampRounded(),
tracker.FindMostRecentUserInputEventBefore(after));
EXPECT_TRUE(tracker.FindAndConsumeInputEventsBefore(after));
EXPECT_EQ(base::TimeTicks(),
tracker.FindMostRecentUserInputEventBefore(after));
}
TEST_F(UserInputTrackerTest, MultipleEvents) {
FakeInputEvent e1;
FakeInputEvent e2;
// Make sure that the two events are monotonically increasing, and that both
// are in the past.
e1.setTimeStampSeconds(ToMonotonicallyIncreasingSeconds(
e2.GetTimeStamp() - base::TimeDelta::FromMilliseconds(100)));
base::TimeTicks after =
e2.GetTimeStampRounded() + base::TimeDelta::FromMicroseconds(1);
{
UserInputTracker tracker;
tracker.OnInputEvent(e1);
tracker.OnInputEvent(e2);
EXPECT_EQ(base::TimeTicks(), tracker.FindMostRecentUserInputEventBefore(
e1.GetTimeStampRounded()));
EXPECT_EQ(
e1.GetTimeStampRounded(),
tracker.FindMostRecentUserInputEventBefore(e2.GetTimeStampRounded()));
EXPECT_EQ(e2.GetTimeStampRounded(),
tracker.FindMostRecentUserInputEventBefore(after));
EXPECT_FALSE(
tracker.FindAndConsumeInputEventsBefore(e1.GetTimeStampRounded()));
EXPECT_EQ(base::TimeTicks(), tracker.FindMostRecentUserInputEventBefore(
e1.GetTimeStampRounded()));
EXPECT_EQ(
e1.GetTimeStampRounded(),
tracker.FindMostRecentUserInputEventBefore(e2.GetTimeStampRounded()));
EXPECT_EQ(e2.GetTimeStampRounded(),
tracker.FindMostRecentUserInputEventBefore(after));
EXPECT_TRUE(tracker.FindAndConsumeInputEventsBefore(after));
EXPECT_EQ(base::TimeTicks(), tracker.FindMostRecentUserInputEventBefore(
e1.GetTimeStampRounded()));
EXPECT_EQ(base::TimeTicks(), tracker.FindMostRecentUserInputEventBefore(
e2.GetTimeStampRounded()));
EXPECT_EQ(base::TimeTicks(),
tracker.FindMostRecentUserInputEventBefore(after));
}
{
UserInputTracker tracker;
tracker.OnInputEvent(e1);
tracker.OnInputEvent(e2);
EXPECT_EQ(e2.GetTimeStampRounded(),
tracker.FindMostRecentUserInputEventBefore(after));
EXPECT_TRUE(tracker.FindAndConsumeInputEventsBefore(after));
EXPECT_EQ(base::TimeTicks(),
tracker.FindMostRecentUserInputEventBefore(after));
}
}
TEST_F(UserInputTrackerTest, IgnoreEventsOlderThanConsumed) {
FakeInputEvent e1;
FakeInputEvent e2;
// Make sure that the two events are monotonically increasing, and that both
// are in the past.
e1.setTimeStampSeconds(ToMonotonicallyIncreasingSeconds(
e2.GetTimeStamp() - base::TimeDelta::FromMilliseconds(100)));
base::TimeTicks after =
e2.GetTimeStampRounded() + base::TimeDelta::FromMicroseconds(1);
UserInputTracker tracker;
tracker.OnInputEvent(e2);
EXPECT_EQ(base::TimeTicks(), tracker.FindMostRecentUserInputEventBefore(
e1.GetTimeStampRounded()));
EXPECT_EQ(base::TimeTicks(), tracker.FindMostRecentUserInputEventBefore(
e2.GetTimeStampRounded()));
EXPECT_EQ(e2.GetTimeStampRounded(),
tracker.FindMostRecentUserInputEventBefore(after));
EXPECT_TRUE(tracker.FindAndConsumeInputEventsBefore(after));
EXPECT_EQ(base::TimeTicks(),
tracker.FindMostRecentUserInputEventBefore(after));
tracker.OnInputEvent(e1);
EXPECT_EQ(base::TimeTicks(), tracker.FindMostRecentUserInputEventBefore(
e1.GetTimeStampRounded()));
EXPECT_EQ(base::TimeTicks(), tracker.FindMostRecentUserInputEventBefore(
e1.GetTimeStampRounded() +
base::TimeDelta::FromMicroseconds(1)));
}
TEST_F(UserInputTrackerTest, ExcludeOldEvents) {
UserInputTracker tracker;
FakeInputEvent e1;
FakeInputEvent e2;
// make sure e1 is too old to be considered.
e1.setTimeStampSeconds(ToMonotonicallyIncreasingSeconds(
e2.GetTimeStamp() -
base::TimeDelta::FromMilliseconds(kTooOldMilliseconds)));
tracker.OnInputEvent(e1);
tracker.OnInputEvent(e2);
EXPECT_EQ(base::TimeTicks(), tracker.FindMostRecentUserInputEventBefore(
e1.GetTimeStampRounded() +
base::TimeDelta::FromMilliseconds(1)));
EXPECT_EQ(base::TimeTicks(),
tracker.FindMostRecentUserInputEventBefore(
e2.GetTimeStampRounded() +
base::TimeDelta::FromMilliseconds(kTooOldMilliseconds)));
EXPECT_EQ(
e2.GetTimeStampRounded(),
tracker.FindMostRecentUserInputEventBefore(
e2.GetTimeStampRounded() + base::TimeDelta::FromMilliseconds(1)));
EXPECT_EQ(base::TimeTicks(), tracker.FindMostRecentUserInputEventBefore(
e2.GetTimeStampRounded()));
}
TEST_F(UserInputTrackerTest, RateLimit) {
const size_t kTooManyEntries = UserInputTracker::kMaxTrackedEvents * 5;
UserInputTracker tracker;
FakeInputEvent e;
// UserInputTracker DCHECKs that event timestamps aren't after the current
// time, so to be safe, we use a starting timestamp that is twice
// kTooManyEntries milliseconds in the past, and then synthesize one event for
// each of kTooManyEntries after this start point. This guarantees that all
// events are in the past.
e.setTimeStampSeconds(ToMonotonicallyIncreasingSeconds(
e.GetTimeStamp() -
base::TimeDelta::FromMilliseconds(kTooManyEntries * 2)));
// Insert more than kMaxEntries entries. The rate limiting logic should
// prevent more than kMaxEntries entries from actually being inserted. A
// DCHECK in OnInputEvent verifies that we don't exceed the expected capacity.
for (size_t i = 0; i < kTooManyEntries; ++i) {
tracker.OnInputEvent(e);
e.setTimeStampSeconds(e.timeStampSeconds() +
base::TimeDelta::FromMilliseconds(1).InSecondsF());
}
// Do a basic sanity check to make sure we can find events in the tracker.
EXPECT_NE(base::TimeTicks(),
tracker.FindMostRecentUserInputEventBefore(base::TimeTicks::Now()));
}
TEST_F(UserInputTrackerTest, IgnoredEventType) {
UserInputTracker tracker;
FakeInputEvent e(blink::WebInputEvent::MouseMove);
tracker.OnInputEvent(e);
EXPECT_EQ(base::TimeTicks(), tracker.FindMostRecentUserInputEventBefore(
e.GetTimeStampRounded() +
base::TimeDelta::FromMilliseconds(1)));
}
TEST_F(UserInputTrackerTest, IgnoreRepeatEvents) {
UserInputTracker tracker;
FakeInputEvent e(blink::WebInputEvent::Char,
blink::WebInputEvent::IsAutoRepeat);
tracker.OnInputEvent(e);
EXPECT_EQ(base::TimeTicks(), tracker.FindMostRecentUserInputEventBefore(
e.GetTimeStampRounded() +
base::TimeDelta::FromMilliseconds(1)));
}
} // namespace page_load_metrics
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