Issue 6649 - Allow u flag in :-abp-contains()

test/browser/elemHideEmulation.js

 /*
  * This file is part of Adblock Plus <https://adblockplus.org/>,
  * Copyright (C) 2006-present eyeo GmbH
  *
  * Adblock Plus is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License version 3 as
  * published by the Free Software Foundation.
  *
  * Adblock Plus is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
@@ skipping 476 matching lines @@
     test, "div:-abp-has(> span:-abp-contains(Advertisment))", expectations);
 };
 
 function runTestPseudoClassContains(test, selector, expectations)
 {
   testDocument.body.innerHTML = `<div id="parent">
       <div id="middle">
         <div id="middle1"><div id="inside" class="inside"></div></div>
       </div>
       <div id="sibling">
-        <div id="tohide">to hide</div>
+        <div id="tohide">to hide \ud83d\ude42!</div>
       </div>
       <div id="sibling2">
         <div id="sibling21"><div id="sibling211" class="inside">Ad*</div></div>
       </div>
     </div>`;
   let elems = {
     parent: testDocument.getElementById("parent"),
     middle: testDocument.getElementById("middle"),
     inside: testDocument.getElementById("inside"),
     sibling: testDocument.getElementById("sibling"),
@@ skipping 43 matching lines @@
     middle: true,
     inside: true,
     sibling: false,
     sibling2: true,
     toHide: true
   };
   runTestPseudoClassContains(
     test, "#parent div:-abp-contains(/to\\sHide/i)", expectations);
 };
 
+exports.testPseudoClassContainsRegexpUFlag = function(test)
+{
+  let expectations = {
+    parent: true,
+    middle: true,
+    inside: true,
+    sibling: false,
+    sibling2: true,
+    toHide: true
+  };
+  runTestPseudoClassContains(
+    test, "#parent div:-abp-contains(/to\\shide\\s.!/u)", expectations);

[Manish Jethani, 2018/05/05 02:01:49]

With the u flag the dot will match the entire Unicode character, not just one of
the surrogates. Without the u flag this test would fail.

+};
+
 exports.testPseudoClassContainsWildcardNoMatch = function(test)
 {
   let expectations = {
     parent: true,
     middle: true,
     inside: true,
     sibling: true,
     sibling2: true,
     toHide: true
   };
@@ skipping 306 matching lines @@
 
     return timeout(REFRESH_INTERVAL);
   }).then(() =>
   {
     // Note: Even though it runs both the :-abp-contains() patterns, it only
     // hides the parent element because of revision d7d51d29aa34.
     expectHidden(test, parent);
     expectVisible(test, child);
   }).catch(unexpectedError.bind(test)).then(() => test.done());
 };