Issue 3143 - Filter elements with :-abp-has()

test/browser/elemHideEmulation.js

 /*
  * This file is part of Adblock Plus <https://adblockplus.org/>,
  * Copyright (C) 2006-2017 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 30 matching lines @@
   }
 
   callback();
 };
 
 exports.tearDown = function(callback)
 {
   var styleElements = document.head.getElementsByTagName("style");
   while (styleElements.length)
     styleElements[0].parentNode.removeChild(styleElements[0]);
+  var child;
+  while(child = document.body.firstChild)
+  {
+    document.body.removeChild(child);
+  }
   callback();
 };
 
 function expectHidden(test, element)
 {
   test.equal(window.getComputedStyle(element).display, "none",
              "The element's display property should be set to 'none'");
 }
 
 function expectVisible(test, element)
@@ skipping 17 matching lines @@
   if (styleElements.length)
     styleElement = styleElements[0];
   else
   {
     styleElement = document.createElement("style");
     document.head.appendChild(styleElement);
   }
   styleElement.sheet.insertRule(rule, styleElement.sheet.cssRules.length);
 }
 
-function createElementWithStyle(styleBlock)
+// insert a <div> with a unique id and and empty CSS rule
+// for the the selector matching the id.
+function createElementWithStyle(styleBlock, parent)
 {
   var element = document.createElement("div");
   element.id = findUniqueId();
-  document.body.appendChild(element);
+  if (!parent)
+    document.body.appendChild(element);
+  else
+    parent.appendChild(element);
   insertStyleRule("#" + element.id + " " + styleBlock);
   return element;
 }
 
-function applyElemHideEmulation(selectors, callback)
+// Will ensure the class ElemHideEmulation is loaded
+// and then will call the callback.
+// NOTE: if it never loads, this will probably hang in an infinite
+// loop
+function loadElemHideEmulation(callback)
 {
   if (typeof ElemHideEmulation == "undefined")
   {
     loadScript(myUrl + "/../../../lib/common.js", function()
     {
       loadScript(myUrl + "/../../../chrome/content/elemHideEmulation.js",
           function()
           {
-            applyElemHideEmulation(selectors, callback);
+            loadElemHideEmulation(callback);
           });
     });
     return;
   }
 
-  var elemHideEmulation = new ElemHideEmulation(
-    window,
-    function(callback)
-    {
-      var patterns = [];
-      selectors.forEach(function(selector)
+  callback();
+}
+
+// instantiate a ElemHideEmulation with @selectors.
+function applyElemHideEmulation(selectors, callback)
+{
+  loadElemHideEmulation(function()
+  {
+    var elemHideEmulation = new ElemHideEmulation(
+      window,
+      function(callback)
       {
-        patterns.push({selector: selector});
-      });
-      callback(patterns);
-    },
-    function(selectors)
-    {
-      if (!selectors.length)
-        return;
-      var selector = selectors.join(", ");
-      insertStyleRule(selector + "{display: none !important;}");
-    }
-  );
-
-  elemHideEmulation.apply();
-  callback();
-}
+        var patterns = [];
+        selectors.forEach(function(selector)
+        {
+          patterns.push({selector: selector});
+        });
+        callback(patterns);
+      },
+      function(selectors)
+      {
+        if (!selectors.length)
+          return;
+        var selector = selectors.join(", ");
+        insertStyleRule(selector + "{display: none !important;}");
+      },
+      function(elements)
+      {
+        if (!elements.length)
+          return;
+        for (var i = 0; i < elements.length; i++)
+          elements[i].style.display = "none";
+      }
+    );
+
+    elemHideEmulation.apply();
+    callback();
+  }.bind(this));
+}
+
+exports.testPseudoHasRule = function(test)
+{
+  loadElemHideEmulation(function()
+  {
+    var selectors = ["div:has(span)"];
+    // testing the regexp
+    var match = pseudoClassHasSelectorRegExp.exec(selectors[0]);
+    test.ok(match);
+    test.equal(match[1], "span");
+
+    selectors = [":has(div.inside)"];
+    match = pseudoClassHasSelectorRegExp.exec(selectors[0]);
+    test.ok(match);
+    test.equal(match[1], "div.inside");
+
+    test.done();
+  });
+};
+
+exports.testExtraFirstSelector = function(test)
+{
+  loadElemHideEmulation(function()
+  {
+    var myselector = "elem.class1.class2";
+    var shortSel = extractFirstSelector(myselector);
+
+    test.equal(shortSel, myselector);
+
+    myselector = "elem > elem2";
+    shortSel = extractFirstSelector(myselector);
+
+    test.equal(shortSel, "elem");
+
+    myselector = "elem+elem2 > elem3";
+    shortSel = extractFirstSelector(myselector);
+
+    test.equal(shortSel, "elem");
+
+    myselector = "elem~elem2 > elem3";
+    shortSel = extractFirstSelector(myselector);
+
+    test.equal(shortSel, "elem");
+
+    test.done();
+  });
+};
+
+exports.testSplitStyleRule = function(test)
+{
+  loadElemHideEmulation(function()
+  {
+    var selectors = splitSelector("div:has(div) > [-abp-properties='background-color: rgb(0, 0, 0)'] > span");
+    test.ok(selectors);
+    test.equal(selectors.length, 1, "There is only one selector");
+
+    selectors = splitSelector("div:has(div), [-abp-properties='background-color: rgb(0, 0, 0)']");
+    test.ok(selectors);
+    test.equal(selectors.length, 2, "There are two selectors");
+
+    test.done();
+  });
+};
 
 exports.testVerbatimPropertySelector = function(test)
 {
   var toHide = createElementWithStyle("{background-color: #000}");
   applyElemHideEmulation(
     ["[-abp-properties='background-color: rgb(0, 0, 0)']"],
     function()
     {
       expectHidden(test, toHide);
       test.done();
     }
   );
 };
 
+exports.testVerbatimPropertySelectorWithPrefix = function(test)
+{
+  var parent = createElementWithStyle("{background-color: #000}");
+  var toHide = createElementWithStyle("{background-color: #000}", parent);
+  applyElemHideEmulation(
+    ["div > [-abp-properties='background-color: rgb(0, 0, 0)']"],
+    function()
+    {
+      expectVisible(test, parent);
+      expectHidden(test, toHide);
+      test.done();
+    }
+  );
+};
+
+exports.testVerbatimPropertySelectorWithPrefixNoMatch = function(test)
+{
+  var parent = createElementWithStyle("{background-color: #000}");
+  var toHide = createElementWithStyle("{background-color: #fff}", parent);
+  applyElemHideEmulation(
+    ["div > [-abp-properties='background-color: rgb(0, 0, 0)']"],
+    function()
+    {
+      expectVisible(test, parent);
+      expectVisible(test, toHide);
+      test.done();
+    }
+  );
+};
+
+exports.testVerbatimPropertySelectorWithSuffix = function(test)
+{
+  var parent = createElementWithStyle("{background-color: #000}");
+  var toHide = createElementWithStyle("{background-color: #000}", parent);
+  applyElemHideEmulation(
+    ["[-abp-properties='background-color: rgb(0, 0, 0)'] > div"],
+    function()
+    {
+      expectVisible(test, parent);
+      expectHidden(test, toHide);
+      test.done();
+    }
+  );
+};
+
+exports.testVerbatimPropertySelectorWithPrefixAndSuffix = function(test)
+{
+  var parent = createElementWithStyle("{background-color: #000}");
+  var middle = createElementWithStyle("{background-color: #000}", parent);
+  var toHide = createElementWithStyle("{background-color: #000}", middle);
+  applyElemHideEmulation(
+    ["div > [-abp-properties='background-color: rgb(0, 0, 0)'] > div"],
+    function()
+    {
+      expectVisible(test, parent);
+      expectVisible(test, middle);
+      expectHidden(test, toHide);
+      test.done();
+    }
+  );
+};
+
 exports.testPropertySelectorWithWildcard = function(test)
 {
   var toHide = createElementWithStyle("{background-color: #000}");
   applyElemHideEmulation(
     ["[-abp-properties='*color: rgb(0, 0, 0)']"],
     function()
     {
       expectHidden(test, toHide);
       test.done();
     }
@@ skipping 49 matching lines @@
       expectVisible(test, toHide);
       insertStyleRule("#" + toHide.id + " {background-color: #000}");
       window.setTimeout(function()
       {
         expectHidden(test, toHide);
         test.done();
       }, 0);
     }
   );
 };
+
+exports.testPseudoClassHasMatcher = function(test)
+{
+  var parent = createElementWithStyle("{}");
+  var child = createElementWithStyle("{}", parent);
+  loadElemHideEmulation(function()
+  {
+    var matcher = new PseudoHasMatcher("div");
+    test.equal(matcher.match(parent).length, 1, "Parent should contain what is expected");
+    test.equal(matcher.match(child).length, 0, "Child shouldn't match");
+
+    var matcher2 = new PseudoHasMatcher("span");
+    test.equal(matcher2.match(parent), 0, "Doesn't have a <span> child, shouldn't mactch");
+    test.equal(matcher2.match(child), 0, "Child shouldn't match");
+
+    test.done();
+  });
+};
+
+exports.testPseudoClassHasSelector = function(test)
+{
+  var toHide = createElementWithStyle("{}");
+  applyElemHideEmulation(
+    ["div:has(div)"],
+    function()
+    {
+      expectVisible(test, toHide);
+      test.done();
+    }
+  );
+};
+
+exports.testPseudoClassHasSelectorWithPrefix = function(test)
+{
+  var parent = createElementWithStyle("{}");
+  var child = createElementWithStyle("{}", parent);
+  applyElemHideEmulation(
+    ["div:has(div)"],
+    function()
+    {
+      expectHidden(test, parent);
+      expectVisible(test, child);
+      test.done();
+    }
+  );
+};
+
+exports.testPseudoClassHasSelectorWithSuffix = function(test)
+{
+  var parent = createElementWithStyle("{}");
+  var middle = createElementWithStyle("{}", parent);
+  var child = createElementWithStyle("{}", middle);
+  applyElemHideEmulation(
+    ["div:has(div) > div"],
+    function()
+    {
+      expectVisible(test, parent);
+      expectVisible(test, middle);
+      expectHidden(test, child);
+      test.done();
+    }
+  );
+};
+
+exports.testPseudoClassHasSelectorWithSuffixSibling = function(test)
+{
+  var parent = createElementWithStyle("{}");
+  var middle = createElementWithStyle("{}", parent);
+  var toHide = createElementWithStyle("{}", parent);
+  applyElemHideEmulation(
+    ["div:has(div) + div"],
+    function()
+    {
+      expectVisible(test, parent);
+      expectVisible(test, middle);
+      expectHidden(test, toHide);
+      test.done();
+    }
+  );
+};
+
+exports.testPseudoClassHasSelectorWithSuffixSibling = function(test)
+{
+  //  <div>
+  //    <div></div>
+  //    <div>
+  //      <div>to hide</div>
+  //    </div>
+  //  </div>
+  var parent = createElementWithStyle("{}");
+  var middle = createElementWithStyle("{}", parent);
+  var sibling = createElementWithStyle("{}", parent);
+  var toHide = createElementWithStyle("{}", sibling);
+  applyElemHideEmulation(
+    ["div:has(div) + div > div"],
+    function()
+    {
+      expectVisible(test, parent);
+      expectVisible(test, middle);
+      expectVisible(test, sibling);
+      expectHidden(test, toHide);
+      test.done();
+    }
+  );
+};
+
+exports.testPseudoClassHasSelectorWithHasAndWithSuffixSibling = function(test)
+{
+  //  <div>
+  //    <div><div class="inside"></div></div>
+  //    <div>
+  //      <div>to hide</div>
+  //    </div>
+  //  </div>
+  var parent = createElementWithStyle("{}");
+  var middle = createElementWithStyle("{}", parent);
+  var inside = createElementWithStyle("{}", middle);
+  inside.className = "inside";
+  var sibling = createElementWithStyle("{}", parent);
+  var toHide = createElementWithStyle("{}", sibling);
+  applyElemHideEmulation(
+    ["div:has(:has(div.inside)) + div > div"],
+    function()
+    {
+      expectVisible(test, parent);
+      expectVisible(test, middle);
+      expectVisible(test, inside);
+      expectVisible(test, sibling);
+      expectHidden(test, toHide);
+      test.done();
+    }
+  );
+};
+
+
+exports.testPseudoClassHasSelectorWithPropSelector = function(test)
+{
+  var parent = createElementWithStyle("{}");
+  var child = createElementWithStyle("{background-color: #000}", parent);
+  applyElemHideEmulation(
+    ["div:has([-abp-properties='background-color: rgb(0, 0, 0)'])"],
+    function()
+    {
+      expectVisible(test, child);
+      expectHidden(test, parent);
+      test.done();
+    }
+  );
+};