Issue 7450 - Implement hide-if-contains-visible-text snippet

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
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  * GNU General Public License for more details.
  *
  * You should have received a copy of the GNU General Public License
  * along with Adblock Plus.  If not, see <http://www.gnu.org/licenses/>.
  */
 
 "use strict";
 
 const {ElemHideEmulation, setTestMode,
        getTestInfo} = require("../../lib/content/elemHideEmulation");
-const {timeout} = require("./_utils");
+const {timeout, expectHidden, expectVisible} = require("./_utils");
 
 const REFRESH_INTERVAL = 200;
 
 let testDocument = null;
 
 exports.setUp = function(callback)
 {
   setTestMode();
 
   let iframe = document.createElement("iframe");
@@ skipping 11 matching lines @@
 
   callback();
 };
 
 function unexpectedError(test, error)
 {
   console.error(error);
   test.ok(false, "Unexpected error: " + error);
 }
 
-function expectHidden(test, element, id)
-{
-  let withId = "";
-  if (typeof id != "undefined")
-    withId = ` with ID '${id}'`;
-
-  test.equal(
-    window.getComputedStyle(element).display, "none",
-    `The element${withId}'s display property should be set to 'none'`);
-}
-
-function expectVisible(test, element, id)
-{
-  let withId = "";
-  if (typeof id != "undefined")
-    withId = ` with ID '${id}'`;
-
-  test.notEqual(
-    window.getComputedStyle(element).display, "none",
-    `The element${withId}'s display property should not be set to 'none'`);
-}
-
 function expectProcessed(test, element, id = null)
 {
   let withId = "";
   if (id)
     withId = ` with ID '${id}'`;
 
   test.ok(
     getTestInfo().lastProcessedElements.has(element),
     `The element${withId} should have been processed`);
 }
@@ skipping 1118 matching lines @@
     {
       if (element.id == "n2" || element.id == "n2_3")
         expectProcessed(test, element, element.id);
       else
         expectNotProcessed(test, element, element.id);
     }
   }
 
   test.done();
 };