Add unit tests for LatencyInfo

ui/base/latency_info_unittest.cc

Index: ui/base/latency_info_unittest.cc
diff --git a/ui/base/latency_info_unittest.cc b/ui/base/latency_info_unittest.cc
new file mode 100644
index 0000000000000000000000000000000000000000..84563be14279f1d0913aede84dd6305e93aaaabf
--- /dev/null
+++ b/ui/base/latency_info_unittest.cc
@@ -0,0 +1,142 @@
+// Copyright (c) 2013 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 "ui/base/latency_info.h"
+
+#include "testing/gtest/include/gtest/gtest.h"
+
+namespace ui {
+
+TEST(LatencyInfoTest, AddTwoSeparateEvent) {
+  LatencyInfo info;
+  info.AddLatencyNumberWithTimestamp(INPUT_EVENT_LATENCY_RWH_COMPONENT,
+                                     0,
+                                     1,
+                                     base::TimeTicks::FromInternalValue(100),
+                                     1);
+  info.AddLatencyNumberWithTimestamp(INPUT_EVENT_LATENCY_ORIGINAL_COMPONENT,
+                                     1,
+                                     5,
+                                     base::TimeTicks::FromInternalValue(1000),
+                                     2);
+
+  EXPECT_EQ(info.latency_components.size(), 2u);
+  LatencyInfo::LatencyComponent component;
+  EXPECT_FALSE(
+      info.FindLatency(INPUT_EVENT_LATENCY_UI_COMPONENT, 0, &component));
+  EXPECT_FALSE(
+      info.FindLatency(INPUT_EVENT_LATENCY_RWH_COMPONENT, 1, &component));
+  EXPECT_TRUE(
+      info.FindLatency(INPUT_EVENT_LATENCY_RWH_COMPONENT, 0, &component));
+  EXPECT_EQ(component.sequence_number, 1);
+  EXPECT_EQ(component.event_count, 1u);
+  EXPECT_EQ(component.event_time.ToInternalValue(), 100);
+  EXPECT_TRUE(
+      info.FindLatency(INPUT_EVENT_LATENCY_ORIGINAL_COMPONENT, 1, &component));
+  EXPECT_EQ(component.sequence_number, 5);
+  EXPECT_EQ(component.event_count, 2u);
+  EXPECT_EQ(component.event_time.ToInternalValue(), 1000);
+}
+
+TEST(LatencyInfoTest, AddTwoSameEvent) {
+  LatencyInfo info;
+  info.AddLatencyNumberWithTimestamp(INPUT_EVENT_LATENCY_RWH_COMPONENT,
+                                     0,
+                                     30,
+                                     base::TimeTicks::FromInternalValue(100),
+                                     2);
+  info.AddLatencyNumberWithTimestamp(INPUT_EVENT_LATENCY_RWH_COMPONENT,
+                                     0,
+                                     13,
+                                     base::TimeTicks::FromInternalValue(200),
+                                     3);
+
+  EXPECT_EQ(info.latency_components.size(), 1u);
+  LatencyInfo::LatencyComponent component;
+  EXPECT_FALSE(
+      info.FindLatency(INPUT_EVENT_LATENCY_UI_COMPONENT, 0, &component));
+  EXPECT_FALSE(
+      info.FindLatency(INPUT_EVENT_LATENCY_RWH_COMPONENT, 1, &component));
+  EXPECT_TRUE(
+      info.FindLatency(INPUT_EVENT_LATENCY_RWH_COMPONENT, 0, &component));
+  EXPECT_EQ(component.sequence_number, 30);
+  EXPECT_EQ(component.event_count, 5u);
+  EXPECT_EQ(component.event_time.ToInternalValue(), (100 * 2 + 200 * 3) / 5);
+}
+
+TEST(LatencyInfoTest, MergeTwoSeparateEvent) {
+  LatencyInfo info1;
+  LatencyInfo info2;
+  info1.AddLatencyNumberWithTimestamp(INPUT_EVENT_LATENCY_RWH_COMPONENT,
+                                      0,
+                                      1,
+                                      base::TimeTicks::FromInternalValue(100),
+                                      1);
+  info2.AddLatencyNumberWithTimestamp(INPUT_EVENT_LATENCY_ORIGINAL_COMPONENT,
+                                      1,
+                                      5,
+                                      base::TimeTicks::FromInternalValue(1000),
+                                      2);
+  info1.MergeWith(info2);
+
+  EXPECT_EQ(info1.latency_components.size(), 2u);
+  LatencyInfo::LatencyComponent component;
+  EXPECT_FALSE(
+      info1.FindLatency(INPUT_EVENT_LATENCY_UI_COMPONENT, 0, &component));
+  EXPECT_FALSE(
+      info1.FindLatency(INPUT_EVENT_LATENCY_RWH_COMPONENT, 1, &component));
+  EXPECT_TRUE(
+      info1.FindLatency(INPUT_EVENT_LATENCY_RWH_COMPONENT, 0, &component));
+  EXPECT_EQ(component.sequence_number, 1);
+  EXPECT_EQ(component.event_count, 1u);
+  EXPECT_EQ(component.event_time.ToInternalValue(), 100);
+  EXPECT_TRUE(
+      info1.FindLatency(INPUT_EVENT_LATENCY_ORIGINAL_COMPONENT, 1, &component));
+  EXPECT_EQ(component.sequence_number, 5);
+  EXPECT_EQ(component.event_count, 2u);
+  EXPECT_EQ(component.event_time.ToInternalValue(), 1000);
+}
+
+TEST(LatencyInfoTest, MergeTwoSameEvent) {
+  LatencyInfo info1;
+  LatencyInfo info2;
+  info1.AddLatencyNumberWithTimestamp(INPUT_EVENT_LATENCY_RWH_COMPONENT,
+                                      0,
+                                      30,
+                                      base::TimeTicks::FromInternalValue(100),
+                                      2);
+  info2.AddLatencyNumberWithTimestamp(INPUT_EVENT_LATENCY_RWH_COMPONENT,
+                                      0,
+                                      13,
+                                      base::TimeTicks::FromInternalValue(200),
+                                      3);
+  info1.MergeWith(info2);
+
+  EXPECT_EQ(info1.latency_components.size(), 1u);
+  LatencyInfo::LatencyComponent component;
+  EXPECT_FALSE(
+      info1.FindLatency(INPUT_EVENT_LATENCY_UI_COMPONENT, 0, &component));
+  EXPECT_FALSE(
+      info1.FindLatency(INPUT_EVENT_LATENCY_RWH_COMPONENT, 1, &component));
+  EXPECT_TRUE(
+      info1.FindLatency(INPUT_EVENT_LATENCY_RWH_COMPONENT, 0, &component));
+  EXPECT_EQ(component.sequence_number, 30);
+  EXPECT_EQ(component.event_count, 5u);
+  EXPECT_EQ(component.event_time.ToInternalValue(), (100 * 2 + 200 * 3) / 5);
+}
+
+TEST(LatencyInfoTest, ClearEvents) {
+  LatencyInfo info;
+  info.AddLatencyNumberWithTimestamp(INPUT_EVENT_LATENCY_RWH_COMPONENT,
+                                     0,
+                                     30,
+                                     base::TimeTicks::FromInternalValue(100),
+                                     2);
+
+  EXPECT_EQ(info.latency_components.size(), 1u);
+  info.Clear();
+  EXPECT_EQ(info.latency_components.size(), 0u);
+}
+
+}  // namespace ui