Implement ThreadedInputConnection.deleteSurroundingTextInCodePoints()

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 <stddef.h>
 #include <stdint.h>
 #include <tuple>
 
 #include "base/bind.h"
 #include "base/callback.h"
@@ skipping 1652 matching lines @@
   EXPECT_EQ(0, info.selectionEnd);
 
   frame()->DeleteSurroundingText(10, 10);
   info = controller->textInputInfo();
   EXPECT_EQ("", info.value);
 
   EXPECT_EQ(0, info.selectionStart);
   EXPECT_EQ(0, info.selectionEnd);
 }
 
+TEST_F(RenderViewImplTest, OnDeleteSurroundingTextInCodePoints) {
+  // Load an HTML page consisting of an input field.
+  LoadHTML(
+      // "ab" + trophy + space + "cdef" + trophy + space + "gh".
+      "<input id=\"test1\" value=\"ab&#x1f3c6; cdef&#x1f3c6; gh\">");
+  ExecuteJavaScriptForTests("document.getElementById('test1').focus();");
+
+  frame()->SetEditableSelectionOffsets(4, 4);
+  frame()->DeleteSurroundingTextInCodePoints(2, 2);
+  blink::WebInputMethodController* controller =
+      frame()->GetWebFrame()->inputMethodController();
+  blink::WebTextInputInfo info = controller->textInputInfo();
+  // "a" + "def" + trophy + space + "gh".
+  EXPECT_EQ(WebString::fromUTF8("adef\xF0\x9F\x8F\x86 gh"), info.value);
+  EXPECT_EQ(1, info.selectionStart);
+  EXPECT_EQ(1, info.selectionEnd);
+
+  frame()->SetEditableSelectionOffsets(1, 3);
+  frame()->DeleteSurroundingTextInCodePoints(1, 4);
+  info = controller->textInputInfo();
+  EXPECT_EQ("deh", info.value);
+  EXPECT_EQ(0, info.selectionStart);
+  EXPECT_EQ(2, info.selectionEnd);
+}
+
 // Test that the navigating specific frames works correctly.
 TEST_F(RenderViewImplTest, NavigateSubframe) {
   // Load page A.
   LoadHTML("hello <iframe srcdoc='fail' name='frame'></iframe>");
 
   // Navigate the frame only.
   CommonNavigationParams common_params;
   RequestNavigationParams request_params;
   common_params.url = GURL("data:text/html,world");
   common_params.navigation_type = FrameMsg_Navigate_Type::DIFFERENT_DOCUMENT;
@@ skipping 881 matching lines @@
   ExpectPauseAndResume(3);
   blink::WebScriptSource source2(
       WebString::fromUTF8("function func2() { func1(); }; func2();"));
   frame()->GetWebFrame()->executeScriptInIsolatedWorld(17, &source2, 1);
 
   EXPECT_FALSE(IsPaused());
   Detach();
 }
 
 }  // namespace content