Add functions to generate input events to PPB_Testing_Dev. These make

it possible to test APIs that require user gestures and other input events.
BUG=none
TEST=none
Review URL: http://codereview.chromium.org/8413021

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@110865 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 290 insertions, 0 deletions

diff --git a/ppapi/tests/test_input_event.cc b/ppapi/tests/test_input_event.cc
new file mode 100644
index 0000000..378a677
--- /dev/null
+++ b/ppapi/tests/test_input_event.cc
@@ -0,0 +1,290 @@
+// Copyright (c) 2011 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 "ppapi/tests/test_input_event.h"
+
+#include "ppapi/c/dev/ppb_testing_dev.h"
+#include "ppapi/c/pp_errors.h"
+#include "ppapi/c/ppb_input_event.h"
+#include "ppapi/cpp/input_event.h"
+#include "ppapi/cpp/module.h"
+#include "ppapi/tests/test_utils.h"
+#include "ppapi/tests/testing_instance.h"
+
+REGISTER_TEST_CASE(InputEvent);
+
+namespace {
+
+const uint32_t kSpaceChar = 0x20;
+const char* kSpaceString = " ";
+
+#define FINISHED_WAITING_MESSAGE "TEST_INPUT_EVENT_FINISHED_WAITING"
+
+pp::Point GetCenter(const pp::Rect& rect) {
+  return pp::Point(
+      rect.x() + rect.width() / 2,
+      rect.y() + rect.height() / 2);
+}
+}
+
+void TestInputEvent::RunTests(const std::string& filter) {
+  RUN_TEST(Events, filter);
+}
+
+TestInputEvent::TestInputEvent(TestingInstance* instance)
+    : TestCase(instance),
+      input_event_interface_(NULL),
+      mouse_input_event_interface_(NULL),
+      wheel_input_event_interface_(NULL),
+      keyboard_input_event_interface_(NULL),
+      view_rect_(),
+      expected_input_event_(0),
+      received_expected_event_(false),
+      received_finish_message_(false) {
+}
+
+TestInputEvent::~TestInputEvent() {
+  // Remove the special listener that only responds to a
+  // FINISHED_WAITING_MESSAGE string. See Init for where it gets added.
+  std::string js_code;
+  js_code += "var plugin = document.getElementById('plugin');"
+             "plugin.removeEventListener('message',"
+             "                           plugin.wait_for_messages_handler);"
+             "delete plugin.wait_for_messages_handler;";
+  pp::Var exception;
+  instance_->ExecuteScript(js_code, &exception);
+}
+
+bool TestInputEvent::Init() {
+  input_event_interface_ = static_cast<PPB_InputEvent const*>(
+      pp::Module::Get()->GetBrowserInterface(PPB_INPUT_EVENT_INTERFACE));
+  mouse_input_event_interface_ = static_cast<PPB_MouseInputEvent const*>(
+      pp::Module::Get()->GetBrowserInterface(
+          PPB_MOUSE_INPUT_EVENT_INTERFACE));
+  wheel_input_event_interface_ = static_cast<PPB_WheelInputEvent const*>(
+      pp::Module::Get()->GetBrowserInterface(
+          PPB_WHEEL_INPUT_EVENT_INTERFACE));
+  keyboard_input_event_interface_ = static_cast<PPB_KeyboardInputEvent const*>(
+      pp::Module::Get()->GetBrowserInterface(
+          PPB_KEYBOARD_INPUT_EVENT_INTERFACE));
+
+  bool success =
+      input_event_interface_ &&
+      mouse_input_event_interface_ &&
+      wheel_input_event_interface_ &&
+      keyboard_input_event_interface_ &&
+      InitTestingInterface();
+
+  // Set up a listener for our message that signals that all input events have
+  // been received.
+  std::string js_code;
+  // Note the following code is dependent on some features of test_case.html.
+  // E.g., it is assumed that the DOM element where the plugin is embedded has
+  // an id of 'plugin', and there is a function 'IsTestingMessage' that allows
+  // us to ignore the messages that are intended for use by the testing
+  // framework itself.
+  js_code += "var plugin = document.getElementById('plugin');"
+             "var wait_for_messages_handler = function(message_event) {"
+             "  if (!IsTestingMessage(message_event.data) &&"
+             "      message_event.data === '" FINISHED_WAITING_MESSAGE "') {"
+             "    plugin.postMessage('" FINISHED_WAITING_MESSAGE "');"
+             "  }"
+             "};"
+             "plugin.addEventListener('message', wait_for_messages_handler);"
+             // Stash it on the plugin so we can remove it in the destructor.
+             "plugin.wait_for_messages_handler = wait_for_messages_handler;";
+  pp::Var exception;
+  instance_->ExecuteScript(js_code, &exception);
+  success = success && exception.is_undefined();
+
+  return success;
+}
+
+pp::InputEvent TestInputEvent::CreateMouseEvent(
+    PP_InputEvent_Type type,
+    PP_InputEvent_MouseButton buttons) {
+  return pp::MouseInputEvent(
+      instance_,
+      type,
+      100,  // time_stamp
+      0,  // modifiers
+      buttons,
+      GetCenter(view_rect_),
+      1,  // click count
+      pp::Point());  // movement
+}
+
+pp::InputEvent TestInputEvent::CreateWheelEvent() {
+  return pp::WheelInputEvent(
+      instance_,
+      100,  // time_stamp
+      0,  // modifiers
+      pp::FloatPoint(1, 2),
+      pp::FloatPoint(3, 4),
+      PP_TRUE);  // scroll_by_page
+}
+
+pp::InputEvent TestInputEvent::CreateKeyEvent(PP_InputEvent_Type type,
+                                              uint32_t key_code) {
+  return pp::KeyboardInputEvent(
+      instance_,
+      type,
+      100,  // time_stamp
+      0,  // modifiers
+      key_code,
+      pp::Var());
+}
+
+pp::InputEvent TestInputEvent::CreateCharEvent(const std::string& text) {
+  return pp::KeyboardInputEvent(
+      instance_,
+      PP_INPUTEVENT_TYPE_CHAR,
+      100,  // time_stamp
+      0,  // modifiers
+      0,  // keycode
+      pp::Var(text));
+}
+
+// Simulates the input event and calls PostMessage to let us know when
+// we have received all resulting events from the browser.
+bool TestInputEvent::SimulateInputEvent(
+    const pp::InputEvent& input_event) {
+  expected_input_event_ = pp::InputEvent(input_event.pp_resource());
+  received_expected_event_ = false;
+  received_finish_message_ = false;
+  testing_interface_->SimulateInputEvent(instance_->pp_instance(),
+                                         input_event.pp_resource());
+  instance_->PostMessage(pp::Var(FINISHED_WAITING_MESSAGE));
+  testing_interface_->RunMessageLoop(instance_->pp_instance());
+  return received_finish_message_ && received_expected_event_;
+}
+
+bool TestInputEvent::AreEquivalentEvents(PP_Resource received,
+                                         PP_Resource expected) {
+  if (!input_event_interface_->IsInputEvent(received) ||
+      !input_event_interface_->IsInputEvent(expected)) {
+    return false;
+  }
+
+  // Test common fields, except modifiers and time stamp, which may be changed
+  // by the browser.
+  int32_t received_type = input_event_interface_->GetType(received);
+  int32_t expected_type = input_event_interface_->GetType(expected);
+  if (received_type != expected_type) {
+    // Allow key down events to match "raw" key down events.
+    if (expected_type != PP_INPUTEVENT_TYPE_KEYDOWN &&
+        received_type != PP_INPUTEVENT_TYPE_RAWKEYDOWN) {
+      return false;
+    }
+  }
+
+  // Test event type-specific fields.
+  switch (input_event_interface_->GetType(received)) {
+    case PP_INPUTEVENT_TYPE_MOUSEDOWN:
+    case PP_INPUTEVENT_TYPE_MOUSEUP:
+    case PP_INPUTEVENT_TYPE_MOUSEMOVE:
+    case PP_INPUTEVENT_TYPE_MOUSEENTER:
+    case PP_INPUTEVENT_TYPE_MOUSELEAVE:
+      // Check mouse fields, except position and movement, which may be
+      // modified by the renderer.
+      return
+          mouse_input_event_interface_->GetButton(received) ==
+          mouse_input_event_interface_->GetButton(expected) &&
+          mouse_input_event_interface_->GetClickCount(received) ==
+          mouse_input_event_interface_->GetClickCount(expected);
+
+    case PP_INPUTEVENT_TYPE_WHEEL:
+      return
+          pp::FloatPoint(wheel_input_event_interface_->GetDelta(received)) ==
+          pp::FloatPoint(wheel_input_event_interface_->GetDelta(expected)) &&
+          pp::FloatPoint(wheel_input_event_interface_->GetTicks(received)) ==
+          pp::FloatPoint(wheel_input_event_interface_->GetTicks(expected)) &&
+          wheel_input_event_interface_->GetScrollByPage(received) ==
+          wheel_input_event_interface_->GetScrollByPage(expected);
+
+    case PP_INPUTEVENT_TYPE_RAWKEYDOWN:
+    case PP_INPUTEVENT_TYPE_KEYDOWN:
+    case PP_INPUTEVENT_TYPE_KEYUP:
+      return
+          keyboard_input_event_interface_->GetKeyCode(received) ==
+          keyboard_input_event_interface_->GetKeyCode(expected);
+
+    case PP_INPUTEVENT_TYPE_CHAR:
+      return
+          keyboard_input_event_interface_->GetKeyCode(received) ==
+          keyboard_input_event_interface_->GetKeyCode(expected) &&
+          pp::Var(pp::Var::PassRef(),
+              keyboard_input_event_interface_->GetCharacterText(received)) ==
+          pp::Var(pp::Var::PassRef(),
+              keyboard_input_event_interface_->GetCharacterText(expected));
+
+    default:
+      break;
+  }
+
+  return false;
+}
+
+bool TestInputEvent::HandleInputEvent(const pp::InputEvent& input_event) {
+  // Some events may cause extra events to be generated, so look for the
+  // first one that matches.
+  if (!received_expected_event_) {
+    received_expected_event_ = AreEquivalentEvents(
+        input_event.pp_resource(),
+        expected_input_event_.pp_resource());
+  }
+  // Handle all input events.
+  return true;
+}
+
+void TestInputEvent::HandleMessage(const pp::Var& message_data) {
+  if (message_data.is_string() &&
+      (message_data.AsString() == FINISHED_WAITING_MESSAGE)) {
+    testing_interface_->QuitMessageLoop(instance_->pp_instance());
+    received_finish_message_ = true;
+  }
+}
+
+void TestInputEvent::DidChangeView(const pp::Rect& position,
+                                   const pp::Rect& clip) {
+  view_rect_ = position;
+}
+
+std::string TestInputEvent::TestEvents() {
+  // Request all input event classes.
+  input_event_interface_->RequestInputEvents(instance_->pp_instance(),
+                                             PP_INPUTEVENT_CLASS_MOUSE |
+                                             PP_INPUTEVENT_CLASS_WHEEL |
+                                             PP_INPUTEVENT_CLASS_KEYBOARD);
+  // Send the events and check that we received them.
+  ASSERT_TRUE(
+      SimulateInputEvent(CreateMouseEvent(PP_INPUTEVENT_TYPE_MOUSEDOWN,
+                                          PP_INPUTEVENT_MOUSEBUTTON_LEFT)));
+  ASSERT_TRUE(
+      SimulateInputEvent(CreateWheelEvent()));
+  ASSERT_TRUE(
+      SimulateInputEvent(CreateKeyEvent(PP_INPUTEVENT_TYPE_KEYDOWN,
+                                        kSpaceChar)));
+  ASSERT_TRUE(
+      SimulateInputEvent(CreateCharEvent(kSpaceString)));
+
+  // Request only mouse events.
+  input_event_interface_->ClearInputEventRequest(instance_->pp_instance(),
+                                                 PP_INPUTEVENT_CLASS_WHEEL |
+                                                 PP_INPUTEVENT_CLASS_KEYBOARD);
+  // Check that we only receive mouse events.
+  ASSERT_TRUE(
+      SimulateInputEvent(CreateMouseEvent(PP_INPUTEVENT_TYPE_MOUSEDOWN,
+                                          PP_INPUTEVENT_MOUSEBUTTON_LEFT)));
+  ASSERT_FALSE(
+      SimulateInputEvent(CreateWheelEvent()));
+  ASSERT_FALSE(
+      SimulateInputEvent(CreateKeyEvent(PP_INPUTEVENT_TYPE_KEYDOWN,
+                                        kSpaceChar)));
+  ASSERT_FALSE(
+      SimulateInputEvent(CreateCharEvent(kSpaceString)));
+
+  PASS();
+}
+