[Android] Enable input event stream validation

content/common/input/touch_event_stream_validator_unittest.cc

+// Copyright 2014 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 "content/common/input/touch_event_stream_validator.h"
+
+#include "content/common/input/synthetic_web_input_event_builders.h"
+#include "content/common/input/web_touch_event_traits.h"
+#include "testing/gtest/include/gtest/gtest.h"
+
+using blink::WebInputEvent;
+using blink::WebTouchEvent;
+using blink::WebTouchPoint;
+
+namespace content {
+
+TEST(TouchEventStreamValidator, ValidTouchStream) {
+  TouchEventStreamValidator validator;
+  SyntheticWebTouchEvent event;
+  std::string error_msg;
+
+  event.PressPoint(0, 1);
+  EXPECT_TRUE(validator.Validate(event, &error_msg));
+  EXPECT_TRUE(error_msg.empty());
+  event.ResetPoints();
+
+  event.PressPoint(1, 0);
+  EXPECT_TRUE(validator.Validate(event, &error_msg));
+  EXPECT_TRUE(error_msg.empty());
+  event.ResetPoints();
+
+  event.MovePoint(1, 1, 1);
+  EXPECT_TRUE(validator.Validate(event, &error_msg));
+  EXPECT_TRUE(error_msg.empty());
+  event.ResetPoints();
+
+  event.ReleasePoint(1);
+  EXPECT_TRUE(validator.Validate(event, &error_msg));
+  EXPECT_TRUE(error_msg.empty());
+  event.ResetPoints();
+
+  event.MovePoint(0, -1, 0);
+  EXPECT_TRUE(validator.Validate(event, &error_msg));
+  EXPECT_TRUE(error_msg.empty());
+  event.ResetPoints();
+
+  event.CancelPoint(0);
+  EXPECT_TRUE(validator.Validate(event, &error_msg));
+  EXPECT_TRUE(error_msg.empty());
+  event.ResetPoints();
+
+  event.PressPoint(-1, -1);
+  EXPECT_TRUE(validator.Validate(event, &error_msg));
+  EXPECT_TRUE(error_msg.empty());
+}
+
+TEST(TouchEventStreamValidator, ResetOnNewTouchStream) {
+  TouchEventStreamValidator validator;
+  SyntheticWebTouchEvent event;
+  std::string error_msg;
+
+  event.PressPoint(0, 1);
+  EXPECT_TRUE(validator.Validate(event, &error_msg));
+  EXPECT_TRUE(error_msg.empty());
+  event.ResetPoints();
+
+  event.CancelPoint(0);
+  event.ResetPoints();
+  event.PressPoint(1, 0);
+  EXPECT_TRUE(validator.Validate(event, &error_msg));
+  EXPECT_TRUE(error_msg.empty());
+}
+
+TEST(TouchEventStreamValidator, MissedTouchStart) {
+  TouchEventStreamValidator validator;
+  SyntheticWebTouchEvent event;
+  std::string error_msg;
+
+  event.PressPoint(0, 1);
+  EXPECT_TRUE(validator.Validate(event, &error_msg));
+  EXPECT_TRUE(error_msg.empty());
+
+  event.PressPoint(1, 0);
+  event.ResetPoints();
+  event.PressPoint(1, 1);
+  EXPECT_FALSE(validator.Validate(event, &error_msg));
+  EXPECT_FALSE(error_msg.empty());
+}
+
+TEST(TouchEventStreamValidator, MissedTouchEnd) {
+  TouchEventStreamValidator validator;
+  SyntheticWebTouchEvent event;
+  std::string error_msg;
+
+  event.PressPoint(0, 1);
+  EXPECT_TRUE(validator.Validate(event, &error_msg));
+  EXPECT_TRUE(error_msg.empty());
+  event.ResetPoints();
+
+  event.PressPoint(0, 1);
+  EXPECT_TRUE(validator.Validate(event, &error_msg));
+  EXPECT_TRUE(error_msg.empty());
+  event.ResetPoints();
+
+  event.ReleasePoint(1);
+  event.ResetPoints();
+  event.PressPoint(1, 1);
+  EXPECT_FALSE(validator.Validate(event, &error_msg));
+  EXPECT_FALSE(error_msg.empty());
+}
+
+TEST(TouchEventStreamValidator, EmptyEvent) {
+  TouchEventStreamValidator validator;
+  WebTouchEvent event;
+  std::string error_msg;
+
+  EXPECT_FALSE(validator.Validate(event, &error_msg));
+  EXPECT_FALSE(error_msg.empty());
+}
+
+TEST(TouchEventStreamValidator, InvalidEventType) {
+  TouchEventStreamValidator validator;
+  WebTouchEvent event;
+  std::string error_msg;
+
+  event.type = WebInputEvent::GestureScrollBegin;
+  event.touchesLength = 1;
+  event.touches[0].state = WebTouchPoint::StatePressed;
+
+  EXPECT_FALSE(validator.Validate(event, &error_msg));
+  EXPECT_FALSE(error_msg.empty());
+}
+
+TEST(TouchEventStreamValidator, InvalidPointStates) {
+  TouchEventStreamValidator validator;
+  std::string error_msg;
+
+  WebInputEvent::Type kTouchTypes[4] = {
+      WebInputEvent::TouchStart, WebInputEvent::TouchMove,
+      WebInputEvent::TouchEnd, WebInputEvent::TouchCancel,
+  };
+
+  WebTouchPoint::State kValidTouchPointStatesForType[4] = {
+      WebTouchPoint::StatePressed, WebTouchPoint::StateMoved,
+      WebTouchPoint::StateReleased, WebTouchPoint::StateCancelled,
+  };
+
+  SyntheticWebTouchEvent start;
+  start.PressPoint(0, 0);
+  for (size_t i = 0; i < 4; ++i) {
+    // Always start with a touchstart to reset the stream validation.
+    EXPECT_TRUE(validator.Validate(start, &error_msg));
+    EXPECT_TRUE(error_msg.empty());
+
+    WebTouchEvent event;
+    event.touchesLength = 1;
+    event.type = kTouchTypes[i];
+    for (size_t j = WebTouchPoint::StateUndefined;
+         j <= WebTouchPoint::StateCancelled;
+         ++j) {
+      event.touches[0].state = static_cast<WebTouchPoint::State>(j);
+      if (event.touches[0].state == kValidTouchPointStatesForType[i]) {
+        EXPECT_TRUE(validator.Validate(event, &error_msg));
+        EXPECT_TRUE(error_msg.empty());
+      } else {
+        EXPECT_FALSE(validator.Validate(event, &error_msg));
+        EXPECT_FALSE(error_msg.empty());
+      }
+    }
+  }
+}
+
+}  // namespace content