[FYI] All-in-one OnCandidateWindow{Show,Update,Hide}

content/renderer/render_view_browsertest.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 "base/basictypes.h"
 
 #include "base/memory/shared_memory.h"
 #include "base/strings/string_util.h"
 #include "base/strings/utf_string_conversions.h"
 #include "base/win/windows_version.h"
@@ skipping 108 matching lines @@
  public:
   RenderViewImplTest() {
     // Attach a pseudo keyboard device to this object.
     mock_keyboard_.reset(new MockKeyboard());
   }
 
   virtual ~RenderViewImplTest() {}
 
   virtual void SetUp() OVERRIDE {
     RenderViewTest::SetUp();
-    // This test depends on Blink flag InputModeAttribute, which is enabled
-    // under only test. Content browser test doesn't enable the feature so we
-    // need enable it manually.
-    // TODO(yoichio): Remove this if InputMode feature is enabled by default.
-    WebRuntimeFeatures::enableInputModeAttribute(true);
+    // Enable Blink's experimental and test only features so that test code
+    // does not have to bother enabling each feature.
+    WebRuntimeFeatures::enableExperimentalFeatures(true);
+    WebRuntimeFeatures::enableTestOnlyFeatures(true);
   }
 
   RenderViewImpl* view() {
     return static_cast<RenderViewImpl*>(view_);
   }
 
   // Sends IPC messages that emulates a key-press event.
   int SendKeyEvent(MockKeyboard::Layout layout,
                    int key_code,
                    MockKeyboard::Modifiers modifiers,
@@ skipping 1929 matching lines @@
   view()->OnNavigate(params);
 
   // An error occurred.
   view()->didFailProvisionalLoad(web_frame, error);
   ProcessPendingMessages();
   const int kMaxOutputCharacters = 22;
   EXPECT_EQ("A suffusion of yellow.",
             UTF16ToASCII(web_frame->contentAsText(kMaxOutputCharacters)));
 }
 
+// Tests if IME API's candidatewindow* events sent from browser are handled
+// in renderer.
+TEST_F(RenderViewImplTest, SendCandidateWindowEvents) {
+  // Sends an HTML with an <input> element and scripts to the renderer.
+  // The script handles all 3 of candidatewindow* events for an
+  // InputMethodContext object and once it received 'show', 'update', 'hide'
+  // should appear in the result div.
+  LoadHTML("<input id='test'>"
+           "<div id='result'>Result: </div>"
+           "<script>"
+           "window.onload = function() {"
+           "  var result = document.getElementById('result');"
+           "  var test = document.getElementById('test');"
+           "  test.focus();"
+           "  var context = test.inputMethodContext;"
+           "  if (context) {"
+           "    context.oncandidatewindowshow = function() {"
+           "        result.innerText += 'show'; };"
+           "    context.oncandidatewindowupdate = function(){"
+           "        result.innerText += 'update'; };"
+           "    context.oncandidatewindowhide = function(){"
+           "        result.innerText += 'hide'; };"
+           "  }"
+           "};"
+           "</script>");
+
+  // Fire candidatewindow events.
+  view()->OnCandidateWindowShow();
+  view()->OnCandidateWindowUpdate();
+  view()->OnCandidateWindowHide();
+
+  // Retrieve the content and check if it is expected.
+  const int kMaxOutputCharacters = 50;
+  std::string output = UTF16ToUTF8(
+      GetMainFrame()->contentAsText(kMaxOutputCharacters));
+  EXPECT_EQ(output, "\nResult:showupdatehide");
+}
+
 }  // namespace content