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

test/browser/elemHideEmulation.js

Index: test/browser/elemHideEmulation.js
===================================================================
--- a/test/browser/elemHideEmulation.js
+++ b/test/browser/elemHideEmulation.js
@@ -12,25 +12,33 @@
  * 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";
 
-/* globals ElemHideEmulation */
+/* globals ElemHideEmulation, splitSelector,
+   parseSelectorContent,
+   parseSelector, positionInParent, makeSelector,
+   PlainSelector, HasSelector, PropsSelector */
 
 let myUrl = document.currentScript.src;
 
 exports.tearDown = function(callback)
 {
   let styleElements = document.head.getElementsByTagName("style");
   while (styleElements.length)
     styleElements[0].parentNode.removeChild(styleElements[0]);
+
+  let child;
+  while (child = document.body.firstChild)
+    child.parentNode.removeChild(child);
+
   callback();
 };
 
 function unexpectedError(error)
 {
   console.error(error);
   this.ok(false, "Unexpected error: " + error);
 }
@@ -64,72 +72,325 @@
   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 a CSS rule
+// for the the selector matching the id.
+function createElementWithStyle(styleBlock, parent)
 {
   let 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)
+// Will ensure the class ElemHideEmulation is loaded.
+// NOTE: if it never loads, this will probably hang.
+function loadElemHideEmulation()
 {
   if (typeof ElemHideEmulation == "undefined")
   {
     return loadScript(myUrl + "/../../../lib/common.js").then(() =>
     {
       return loadScript(myUrl + "/../../../chrome/content/elemHideEmulation.js");
     }).then(() =>
     {
-      return applyElemHideEmulation(selectors);
+      return loadElemHideEmulation();
     });
   }
 
-  let elemHideEmulation = new ElemHideEmulation(
-    window,
-    callback =>
-    {
-      let patterns = [];
-      selectors.forEach(selector =>
-      {
-        patterns.push({selector});
-      });
-      callback(patterns);
-    }, newSelectors =>
-    {
-      if (!newSelectors.length)
-        return;
-      let selector = newSelectors.join(", ");
-      insertStyleRule(selector + "{display: none !important;}");
-    }
-  );
-
-  elemHideEmulation.apply();
   return Promise.resolve();
 }
 
+// Create a new ElemHideEmulation instance with @selectors.
+function applyElemHideEmulation(selectors)
+{
+  return loadElemHideEmulation().then(() =>
+  {
+    let elemHideEmulation = new ElemHideEmulation(
+      window,
+      callback =>
+      {
+        let patterns = [];
+        selectors.forEach(selector =>
+        {
+          patterns.push({selector});
+        });
+        callback(patterns);
+      },
+      newSelectors =>
+      {
+        if (!newSelectors.length)
+          return;
+        let selector = newSelectors.join(", ");
+        insertStyleRule(selector + "{display: none !important;}");
+      },
+      elems =>
+      {
+        for (let elem of elems)
+          elem.style.display = "none";
+      }
+    );
+
+    elemHideEmulation.apply();
+    return Promise.resolve(elemHideEmulation);
+  });
+}
+
+// internals testing
+
+exports.testParseSelectorContent = function(test)
+{
+  loadElemHideEmulation().then(() =>
+  {
+    let parsed = parseSelectorContent(":-abp-has(> div) > div", 10);
+    test.equal(parsed.text, "> div");
+    test.equal(parsed.end, 15);
+
+    parsed = parseSelectorContent("> div) > div", 0);
+    test.equal(parsed.text, "> div");
+    test.equal(parsed.end, 5);
+
+    // parens not closed.
+    parsed = parseSelectorContent("> div > div", 0);
+    test.equal(parsed, null);
+  }).catch(unexpectedError.bind(test)).then(() => test.done());
+};
+
+exports.testParseSelector = function(test)
+{
+  loadElemHideEmulation().then(() =>
+  {
+    let selectors = parseSelector("");
+    test.equal(selectors.length, 0);
+
+    let selector = "div > :-abp-properties('background-color: rgb(0, 0, 0)')";
+    selectors = parseSelector(selector);
+    test.equal(selectors.length, 2);
+    test.ok(selectors[0] instanceof PlainSelector);
+    test.ok(selectors[1] instanceof PropsSelector);
+
+    selector = "div > :-abp-has(> div.inside) > div";
+    selectors = parseSelector(selector);
+    test.equal(selectors.length, 3);
+    test.ok(selectors[0] instanceof PlainSelector);
+    test.ok(selectors[1] instanceof HasSelector);
+    test.ok(selectors[2] instanceof PlainSelector);
+
+    selector = "div > div:-abp-has(> div.inside) > div";
+    selectors = parseSelector(selector);
+
+    test.equal(selectors.length, 3);
+    test.ok(selectors[0] instanceof PlainSelector);
+    test.ok(selectors[1] instanceof HasSelector);
+    test.ok(selectors[2] instanceof PlainSelector);
+
+    selector = "div > :-abp-has(> div.inside) > :-abp-properties(background-color: rgb(0, 0, 0))";
+    selectors = parseSelector(selector);
+
+    test.equal(selectors.length, 4);
+    test.ok(selectors[0] instanceof PlainSelector);
+    test.ok(selectors[1] instanceof HasSelector);
+    test.ok(selectors[2] instanceof PlainSelector);
+    test.ok(selectors[3] instanceof PropsSelector);
+
+    selector = "div > :-abp-has(> div.inside > :-abp-properties(background-color: rgb(0, 0, 0))";
+    selectors = parseSelector(selector);
+    test.equal(selectors, null);
+
+    // -abp-has-unsupported() is unknown. Ensure we fail parsing.
+    selector = 'div[arial-label="Story"]:-abp-has(> div > div > span > span:-abp-unsupported("Suggested Post"))';
+    selectors = parseSelector(selector);
+    test.equal(selectors, null);
+  }).catch(unexpectedError.bind(test)).then(() => test.done());
+};
+
+function buildDom(doc)
+{
+  doc.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>
+    <div id="sibling2">
+      <div id="sibling21"><div id="sibling211" class="inside"></div></div>
+    </div>
+  </div>`;
+  let parent = document.getElementById("parent");
+  let middle = document.getElementById("middle");
+  let middle1 = document.getElementById("middle1");
+  let inside = document.getElementById("inside");
+  let sibling = document.getElementById("sibling");
+  let sibling2 = document.getElementById("sibling2");
+  let toHide = document.getElementById("tohide");
+  return {parent, middle, middle1, inside, sibling, sibling2, toHide};
+}
+
+exports.testPositionInParent = function(test)
+{
+  let nodes = buildDom(document);
+
+  loadElemHideEmulation().then(() =>
+  {
+    test.equal(positionInParent(nodes.middle1), 1);
+    test.equal(positionInParent(nodes.inside), 1);
+    test.equal(positionInParent(nodes.sibling2), 3);
+  }).catch(unexpectedError.bind(test)).then(() => test.done());
+};
+
+exports.testMakeSelector = function(test)
+{
+  let nodes = buildDom(document);
+
+  loadElemHideEmulation().then(() =>
+  {
+    test.equal(makeSelector(nodes.middle, ""),
+               ":root > BODY:nth-child(2) > DIV:nth-child(1) > DIV:nth-child(1)");
+    test.equal(makeSelector(nodes.toHide, ""),
+               ":root > BODY:nth-child(2) > DIV:nth-child(1) > DIV:nth-child(2) > DIV:nth-child(1)");
+  }).catch(unexpectedError.bind(test)).then(() => test.done());
+};
+
+exports.testPlainSelector = function(test)
+{
+  buildDom(document);
+
+  loadElemHideEmulation().then(() =>
+  {
+    let selector = new PlainSelector("div > div");
+
+    let iter = selector.getSelectors("foo > ");
+    let value = iter.next();
+    test.equal(value.value[0], "foo > div > div");
+    test.ok(iter.next().done);
+  }).catch(unexpectedError.bind(test)).then(() => test.done());
+};
+
+exports.testHasSelector = function(test)
+{
+  buildDom(document);
+
+  loadElemHideEmulation().then(() =>
+  {
+    let selector = new HasSelector("> div.inside");
+
+    let iter = selector.getSelectors("", document, document.sheet);
+    let value = iter.next();
+    test.ok(!value.done);
+    test.equal(value.value[0],
+               ":root > BODY:nth-child(2) > DIV:nth-child(1) > DIV:nth-child(1) > DIV:nth-child(1)");
+
+    iter = selector.getElements("", document, document.sheet);
+    value = iter.next();
+    test.ok(!value.done);
+    test.equal(value.value.id, "middle1");
+    value = iter.next();
+    test.ok(!value.done);
+    test.equal(value.value.id, "sibling21");
+    value = iter.next();
+    test.ok(value.done);
+
+    selector = new HasSelector(":-abp-has(> div.inside)");
+
+    test.ok(selector._innerSelectors);
+  }).catch(unexpectedError.bind(test)).then(() => test.done());
+};
+
+exports.testSplitStyleRule = function(test)
+{
+  loadElemHideEmulation().then(() =>
+  {
+    let selectors = splitSelector("div:-abp-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:-abp-has(div), [-abp-properties='background-color: rgb(0, 0, 0)']");
+    test.ok(selectors);
+    test.equal(selectors.length, 2, "There are two selectors");
+  }).catch(unexpectedError.bind(test)).then(() => test.done());
+};
+
+// API testing
+
 exports.testVerbatimPropertySelector = function(test)
 {
   let toHide = createElementWithStyle("{background-color: #000}");
   applyElemHideEmulation(
     [":-abp-properties(background-color: rgb(0, 0, 0))"]
   ).then(() =>
   {
     expectHidden(test, toHide);
   }).catch(unexpectedError.bind(test)).then(() => test.done());
 };
 
+exports.testVerbatimPropertySelectorWithPrefix = function(test)
+{
+  let parent = createElementWithStyle("{background-color: #000}");
+  let toHide = createElementWithStyle("{background-color: #000}", parent);
+  applyElemHideEmulation(
+    ["div > :-abp-properties(background-color: rgb(0, 0, 0))"]
+  ).then(() =>
+  {
+    expectVisible(test, parent);
+    expectHidden(test, toHide);
+  }).catch(unexpectedError.bind(test)).then(() => test.done());
+};
+
+exports.testVerbatimPropertySelectorWithPrefixNoMatch = function(test)
+{
+  let parent = createElementWithStyle("{background-color: #000}");
+  let toHide = createElementWithStyle("{background-color: #fff}", parent);
+  applyElemHideEmulation(
+    ["div > :-abp-properties(background-color: rgb(0, 0, 0))"]
+  ).then(() =>
+  {
+    expectVisible(test, parent);
+    expectVisible(test, toHide);
+  }).catch(unexpectedError.bind(test)).then(() => test.done());
+};
+
+exports.testVerbatimPropertySelectorWithSuffix = function(test)
+{
+  let parent = createElementWithStyle("{background-color: #000}");
+  let toHide = createElementWithStyle("{background-color: #000}", parent);
+  applyElemHideEmulation(
+    [":-abp-properties(background-color: rgb(0, 0, 0)) > div"]
+  ).then(() =>
+  {
+    expectVisible(test, parent);
+    expectHidden(test, toHide);
+  }).catch(unexpectedError.bind(test)).then(() => test.done());
+};
+
+exports.testVerbatimPropertyPseudoSelectorWithPrefixAndSuffix = function(test)
+{
+  let parent = createElementWithStyle("{background-color: #000}");
+  let middle = createElementWithStyle("{background-color: #000}", parent);
+  let toHide = createElementWithStyle("{background-color: #000}", middle);
+  applyElemHideEmulation(
+    ["div > :-abp-properties(background-color: rgb(0, 0, 0)) > div"]
+  ).then(() =>
+  {
+    expectVisible(test, parent);
+    expectVisible(test, middle);
+    expectHidden(test, toHide);
+  }).catch(unexpectedError.bind(test)).then(() => test.done());
+};
+
 exports.testPropertySelectorWithWildcard = function(test)
 {
   let toHide = createElementWithStyle("{background-color: #000}");
   applyElemHideEmulation(
     [":-abp-properties(*color: rgb(0, 0, 0))"]
   ).then(() =>
   {
     expectHidden(test, toHide);
@@ -183,8 +444,143 @@
       window.setTimeout(() =>
       {
         expectHidden(test, toHide);
         resolve();
       }, 0);
     });
   }).catch(unexpectedError.bind(test)).then(() => test.done());
 };
+
+exports.testPseudoClassHasSelector = function(test)
+{
+  let toHide = createElementWithStyle("{}");
+  applyElemHideEmulation(
+    ["div:-abp-has(div)"]
+  ).then(() =>
+  {
+    expectVisible(test, toHide);
+  }).catch(unexpectedError.bind(test)).then(() => test.done());
+};
+
+exports.testPseudoClassHasSelectorWithPrefix = function(test)
+{
+  let parent = createElementWithStyle("{}");
+  let child = createElementWithStyle("{}", parent);
+  applyElemHideEmulation(
+    ["div:-abp-has(div)"]
+  ).then(() =>
+  {
+    expectHidden(test, parent);
+    expectVisible(test, child);
+  }).catch(unexpectedError.bind(test)).then(() => test.done());
+};
+
+exports.testPseudoClassHasSelectorWithSuffix = function(test)
+{
+  let parent = createElementWithStyle("{}");
+  let middle = createElementWithStyle("{}", parent);
+  let child = createElementWithStyle("{}", middle);
+  applyElemHideEmulation(
+    ["div:-abp-has(div) > div"]
+  ).then(() =>
+  {
+    expectVisible(test, parent);
+    expectHidden(test, middle);
+    expectHidden(test, child);
+  }).catch(unexpectedError.bind(test)).then(() => test.done());
+};
+
+exports.testPseudoClassHasSelectorWithSuffixSibling = function(test)
+{
+  let parent = createElementWithStyle("{}");
+  let middle = createElementWithStyle("{}", parent);
+  let toHide = createElementWithStyle("{}");
+  applyElemHideEmulation(
+    ["div:-abp-has(div) + div"]
+  ).then(() =>
+  {
+    expectVisible(test, parent);
+    expectVisible(test, middle);
+    expectHidden(test, toHide);
+  }).catch(unexpectedError.bind(test)).then(() => test.done());
+};
+
+exports.testPseudoClassHasSelectorWithSuffixSiblingChild = function(test)
+{
+  //  <div>
+  //    <div></div>
+  //    <div>
+  //      <div>to hide</div>
+  //    </div>
+  //  </div>
+  let parent = createElementWithStyle("{}");
+  let middle = createElementWithStyle("{}", parent);
+  let sibling = createElementWithStyle("{}");
+  let toHide = createElementWithStyle("{}", sibling);
+  applyElemHideEmulation(
+    ["div:-abp-has(div) + div > div"]
+  ).then(() =>
+  {
+    expectVisible(test, parent);
+    expectVisible(test, middle);
+    expectVisible(test, sibling);
+    expectHidden(test, toHide);
+  }).catch(unexpectedError.bind(test)).then(() => test.done());
+};
+
+function runTestPseudoClassHasSelectorWithHasAndWithSuffixSibling(test, selector)
+{
+  document.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>
+      <div id="sibling2">
+        <div id="sibling21"><div id="sibling211" class="inside"></div></div>
+      </div>
+    </div>`;
+  let parent = document.getElementById("parent");
+  let middle = document.getElementById("middle");
+  let inside = document.getElementById("inside");
+  let sibling = document.getElementById("sibling");
+  let sibling2 = document.getElementById("sibling2");
+  let toHide = document.getElementById("tohide");
+
+  insertStyleRule(".inside {}");
+
+  applyElemHideEmulation(
+    [selector]
+  ).then(() =>
+  {
+    expectVisible(test, parent);
+    expectVisible(test, middle);
+    expectVisible(test, inside);
+    expectVisible(test, sibling);
+    expectVisible(test, sibling2);
+    expectHidden(test, toHide);
+  }).catch(unexpectedError.bind(test)).then(() => test.done());
+}
+
+exports.testPseudoClassHasSelectorWithHasAndWithSuffixSibling = function(test)
+{
+  runTestPseudoClassHasSelectorWithHasAndWithSuffixSibling(test, "div:-abp-has(:-abp-has(div.inside)) + div > div");
+};
+
+exports.testPseudoClassHasSelectorWithHasAndWithSuffixSibling2 = function(test)
+{
+  runTestPseudoClassHasSelectorWithHasAndWithSuffixSibling(test, "div:-abp-has(:-abp-has(> div.inside)) + div > div");
+};
+
+exports.testPseudoClassHasSelectorWithPropSelector = function(test)
+{
+  let parent = createElementWithStyle("{}");
+  let child = createElementWithStyle("{background-color: #000}", parent);
+  applyElemHideEmulation(
+    ["div:-abp-has(:-abp-properties(background-color: rgb(0, 0, 0)))"]
+  ).then(() =>
+  {
+    expectVisible(test, child);
+    expectHidden(test, parent);
+  }).catch(unexpectedError.bind(test)).then(() => test.done());
+};