Issue 4125 - [emscripten] Convert filter classes to C++

test/filterClasses.js

+/*
+ * This file is part of Adblock Plus <https://adblockplus.org/>,
+ * Copyright (C) 2006-2016 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";
 
-let {
-  Filter, InvalidFilter, CommentFilter, RegExpFilter, WhiteListFilter,
-  ElemHideFilter, ElemHideException
-} = require("../lib/filterClassesNew");
-
-Filter.fromText("/asdf??+/");
+let {createSandbox} = require("./_common");
+
+let Filter = null;
+let InvalidFilter = null;
+let CommentFilter = null;
+let ActiveFilter = null;
+let RegExpFilter = null;
+let BlockingFilter = null;
+let WhitelistFilter = null;
+let ElemHideBase = null;
+let ElemHideFilter = null;
+let ElemHideException = null;
+let CSSPropertyFilter = null;
+
+exports.setUp = function(callback)
+{
+  let sandboxedRequire = createSandbox();
+  (
+    {
+      Filter, InvalidFilter, CommentFilter, ActiveFilter, RegExpFilter,
+      BlockingFilter, WhitelistFilter, ElemHideBase, ElemHideFilter,
+      ElemHideException, CSSPropertyFilter
+    } = sandboxedRequire("../lib/filterClassesNew")
+  );
+  callback();
+};
 
 exports.testFromText = function(test)
 {
   let tests = [
     ["!asdf", CommentFilter, "comment"],
-    ["asdf", RegExpFilter, "blocking"],
-    ["asdf$image,~collapse", RegExpFilter, "blocking"],
-    ["/asdf/", RegExpFilter, "blocking"],
+    ["asdf", BlockingFilter, "blocking"],
+    ["asdf$image,~collapse", BlockingFilter, "blocking"],
+    ["/asdf/", BlockingFilter, "blocking"],
     ["/asdf??+/", InvalidFilter, "invalid"],
-    ["@@asdf", WhiteListFilter, "whitelist"],
-    ["@@asdf$image,~collapse", WhiteListFilter, "whitelist"],
-    ["@@/asdf/", WhiteListFilter, "whitelist"],
+    ["@@asdf", WhitelistFilter, "whitelist"],
+    ["@@asdf$image,~collapse", WhitelistFilter, "whitelist"],
+    ["@@/asdf/", WhitelistFilter, "whitelist"],
     ["@@/asdf??+/", InvalidFilter, "invalid"],
     ["##asdf", ElemHideFilter, "elemhide"],
     ["#@#asdf", ElemHideException, "elemhideexception"],
     ["foobar##asdf", ElemHideFilter, "elemhide"],
     ["foobar#@#asdf", ElemHideException, "elemhideexception"],
     ["foobar##a", ElemHideFilter, "elemhide"],
     ["foobar#@#a", ElemHideException, "elemhideexception"],
 
-    ["foobar#asdf", RegExpFilter, "blocking"],
-    ["foobar|foobas##asdf", RegExpFilter, "blocking"],
-    ["foobar##asdf{asdf}", RegExpFilter, "blocking"],
-    ["foobar##", RegExpFilter, "blocking"],
-    ["foobar#@#", RegExpFilter, "blocking"],
+    ["foobar#asdf", BlockingFilter, "blocking"],
+    ["foobar|foobas##asdf", BlockingFilter, "blocking"],
+    ["foobar##asdf{asdf}", BlockingFilter, "blocking"],
+    ["foobar##", BlockingFilter, "blocking"],
+    ["foobar#@#", BlockingFilter, "blocking"],
+    ["asdf$foobar", InvalidFilter, "invalid"],
+    ["asdf$image,foobar", InvalidFilter, "invalid"],
+    ["asdf$image=foobar", BlockingFilter, "blocking"],
+    ["asdf$image=foobar=xyz,~collapse", BlockingFilter, "blocking"],
+
+    ["##foo[-abp-properties='something']bar", InvalidFilter, "invalid"],
+    ["#@#foo[-abp-properties='something']bar", ElemHideException, "elemhideexception"],
+    ["example.com##foo[-abp-properties='something']bar", CSSPropertyFilter, "cssproperty"],
+    ["example.com#@#foo[-abp-properties='something']bar", ElemHideException, "elemhideexception"],
+    ["~example.com##foo[-abp-properties='something']bar", InvalidFilter, "invalid"],
+    ["~example.com#@#foo[-abp-properties='something']bar", ElemHideException, "elemhideexception"],
+    ["~example.com,~example.info##foo[-abp-properties='something']bar", InvalidFilter, "invalid"],
+    ["~example.com,~example.info#@#foo[-abp-properties='something']bar", ElemHideException, "elemhideexception"],
+    ["~sub.example.com,example.com##foo[-abp-properties='something']bar", CSSPropertyFilter, "cssproperty"],
+    ["~sub.example.com,example.com#@#foo[-abp-properties='something']bar", ElemHideException, "elemhideexception"],
+    ["example.com,~sub.example.com##foo[-abp-properties='something']bar", CSSPropertyFilter, "cssproperty"],
+    ["example.com,~sub.example.com#@#foo[-abp-properties='something']bar", ElemHideException, "elemhideexception"],
+    ["example.com##[-abp-properties='something']", CSSPropertyFilter, "cssproperty"],
+    ["example.com#@#[-abp-properties='something']", ElemHideException, "elemhideexception"],
+    ["example.com##[-abp-properties=\"something\"]", CSSPropertyFilter, "cssproperty"],
+    ["example.com#@#[-abp-properties=\"something\"]", ElemHideException, "elemhideexception"],
+    ["example.com##[-abp-properties=(something)]", ElemHideFilter, "elemhide"],
+    ["example.com#@#[-abp-properties=(something)]", ElemHideException, "elemhideexception"],
   ];
   for (let [text, type, typeName, location] of tests)
   {
     let filter = Filter.fromText(text);
-    try
-    {
-      test.ok(filter instanceof Filter, "Got filter for " + text);
-      test.equal(filter.text, text, "Correct filter text for " + text);
-      test.ok(filter instanceof type, "Correct filter type for " + text);
-      test.equal(filter.type, typeName, "Type name for " + text + " is " + typeName);
-      if (type == InvalidFilter)
-        test.ok(filter.reason, "Invalid filter " + text + " has a reason set");
+    test.ok(filter instanceof Filter, "Got filter for " + text);
+    test.equal(filter.text, text, "Correct filter text for " + text);
+    test.ok(filter instanceof type, "Correct filter type for " + text);
+    test.equal(filter.type, typeName, "Type name for " + text + " is " + typeName);
+    if (type == InvalidFilter)
+      test.ok(filter.reason, "Invalid filter " + text + " has a reason set");
+    filter.delete();
+  }
+  test.done();
+};
+
+exports.testClassHierarchy = function(test)
+{
+  let allClasses = ["Filter", "InvalidFilter", "CommentFilter", "ActiveFilter",
+    "RegExpFilter", "BlockingFilter", "WhitelistFilter", "ElemHideBase",
+    "ElemHideFilter", "ElemHideException", "CSSPropertyFilter"];
+  let tests = [
+    ["/asdf??+/", "Filter", "InvalidFilter"],
+    ["!asdf", "Filter", "CommentFilter"],
+    ["asdf", "Filter", "ActiveFilter", "RegExpFilter", "BlockingFilter"],
+    ["@@asdf", "Filter", "ActiveFilter", "RegExpFilter", "WhitelistFilter"],
+    ["##asdf", "Filter", "ActiveFilter", "ElemHideBase", "ElemHideFilter"],
+    ["#@#asdf", "Filter", "ActiveFilter", "ElemHideBase", "ElemHideException"],
+    ["example.com##[-abp-properties='something']", "Filter", "ActiveFilter", "ElemHideBase", "CSSPropertyFilter"],
+  ];
+
+  for (let list of tests)
+  {
+    let filter = Filter.fromText(list.shift());
+    for (let cls of list)
+    {
+      test.ok(filter instanceof eval(cls),
+          "Filter " + filter.text + " is an instance of " + cls);
     }
-    finally
-    {
-      filter.delete();
+
+    for (let cls of allClasses)
+    {
+      if (list.indexOf(cls) < 0)
+      {
+        test.ok(!(filter instanceof eval(cls)),
+            "Filter " + filter.text + " isn't an instance of " + cls);
+      }
     }
-  }
+    filter.delete();
+  }
+
+  test.done();
+};
+
+exports.testGC = function(test)
+{
+  let filter1 = Filter.fromText("someknownfilter");
+  test.equal(filter1.hitCount, 0, "Initial hit count");
+
+  filter1.hitCount = 432;
+
+  let filter2 = Filter.fromText("someknownfilter");
+  test.equal(filter2.hitCount, 432, "Known filter returned");
+
+  filter2.hitCount = 234;
+  test.equal(filter1.hitCount, 234, "Changing second wrapper modifies original as well");
+
+  filter1.delete();
+  filter2.delete();
+
+  let filter3 = Filter.fromText("someknownfilter");
+  test.equal(filter3.hitCount, 0, "Filter data has been reset once previous instances have been released");
+  filter3.delete();
+
   test.done();
 };
 
 exports.testNormalize = function(test)
 {
   let tests = [
-    ["  foo bar ", "foobar"],
-    ["foobar", "foobar"],
     [" !  comment something ", "!  comment something"],
     [" ! \n comment something ", "!  comment something"],
-    [" foo , bar ## foo > bar ", "foo,bar##foo > bar"],
-    [" foo , bar #@# foo > bar ", "foo,bar#@#foo > bar"],
-  ];
-  for (let [text, expected] of tests)
-    test.equal(Filter.normalize(text), expected);
+    ["  foo bar ", "foobar"],
+    [" foo , bar #  # foo > bar ", "foo,bar##foo > bar", "foo,bar", "foo > bar"],
+    [" foo , bar # @   # foo > bar ", "foo,bar#@#foo > bar", "foo,bar", "foo > bar"],
+    ["foOBar"],
+    ["foOBar#xyz"],
+    ["foOBar$iMaGe,object_subrequest,~coLLapse", "foOBar$image,object-subrequest,~collapse"],
+    ["foOBar$doMain=EXample.COM|~exAMPLE.РФ", "foOBar$domain=example.com|~example.рф"],
+    ["foOBar$sitekeY=SiteKey", "foOBar$sitekey=SiteKey"],
+    ["exampLE.com##fooBAr", "example.com##fooBAr"],
+    ["exampLE.com#@#fooBAr", "example.com#@#fooBAr"],
+    ["exampLE.РФ#@#fooBAr", "example.рф#@#fooBAr"],
+  ];
+
+  for (let [text, expected, selectorDomain, selector] of tests)
+  {
+    if (!expected)
+      expected = text;
+
+    let filter1 = Filter.fromText(text);
+    let filter2 = Filter.fromText(expected);
+
+    test.equal(filter1.text, expected, "Filter text " + text + " got normalized");
+    test.equal(filter2.text, expected, "Already normalized text " + expected + " didn't change");
+
+    if (filter1 instanceof ActiveFilter)
+    {
+      filter1.hitCount = 567;
+      test.equal(filter1.hitCount, filter2.hitCount, "Property changes on filter " + text + " get reflected on filter " + expected);
+    }
+
+    if (selectorDomain)
+    {
+      let expectedDomains = selectorDomain.split(",").sort().join(",");
+      let actualDomains1 = filter1.selectorDomain.split(",").sort().join(",");
+      let actualDomains2 = filter2.selectorDomain.split(",").sort().join(",");
+      test.equal(actualDomains1, expectedDomains, "Correct selector domain for filter " + text);
+      test.equal(actualDomains1, expectedDomains, "Correct selector domain for filter " + expected);
+
+      test.equal(filter1.selector, selector, "Correct selector for filter " + text);
+      test.equal(filter2.selector, selector, "Correct selector for filter " + expected);
+    }
+
+    filter1.delete();
+    filter2.delete();
+  }
+
+  test.done();
+};
+
+exports.testSerialize = function(test)
+{
+  // Comment
+  let filter = Filter.fromText("! serialize");
+  test.equal(filter.serialize(), "[Filter]\ntext=! serialize\n");
+  filter.delete();
+
+  // Blocking filter
+  filter = Filter.fromText("serialize");
+  test.equal(filter.serialize(), "[Filter]\ntext=serialize\n");
+  filter.disabled = true;
+  test.equal(filter.serialize(), "[Filter]\ntext=serialize\ndisabled=true\n");
+  filter.disabled = false;
+  filter.hitCount = 10;
+  filter.lastHit = 12;
+  test.equal(filter.serialize(), "[Filter]\ntext=serialize\nhitCount=10\nlastHit=12\n");
+  filter.delete();
+
+  // Invalid filter
+  filter = Filter.fromText("serialize$foobar");
+  test.equal(filter.serialize(), "[Filter]\ntext=serialize$foobar\n");
+  filter.delete();
+
+  // Element hiding filter
+  filter = Filter.fromText("example.com##serialize");
+  test.equal(filter.serialize(), "[Filter]\ntext=example.com##serialize\n");
+  filter.disabled = true;
+  filter.lastHit = 5;
+  test.equal(filter.serialize(), "[Filter]\ntext=example.com##serialize\ndisabled=true\nlastHit=5\n");
+  filter.delete();
+
+  test.done();
+};
+
+exports.testInvalidReasons = function(test)
+{
+  let tests = [
+    ["/??/", "filter_invalid_regexp"],
+    ["asd$foobar", "filter_unknown_option"],
+    ["~foo.com##[-abp-properties='abc']", "filter_cssproperty_nodomain"],
+  ];
+
+  for (let [text, reason] of tests)
+  {
+    let filter = Filter.fromText(text);
+    test.equals(filter.reason, reason, "Reason why filter " + text + " is invalid");
+    filter.delete();
+  }
+
   test.done();
 };
 
 exports.testActiveFilter = function(test)
 {
   let filter1 = Filter.fromText("asdf");
   let filter1copy = Filter.fromText("asdf");
   let filter2 = Filter.fromText("##foobar");
 
-  try
-  {
-    test.ok(!filter1.disabled && !filter1copy.disabled && !filter2.disabled, "Filters are initially enabled");
-    filter1.disabled = true;
-    test.ok(filter1.disabled, "Disabling filter works");
-    test.ok(filter1copy.disabled, "Filter copies are also disabled");
-    test.ok(!filter2.disabled, "Disabling one filter doesn't disable others");
-
-    test.ok(filter1.hitCount === 0 && filter1copy.hitCount === 0 && filter2.hitCount === 0, "Filters have no hit initially");
-    filter1.hitCount = 5;
-    test.equal(filter1.hitCount, 5, "Changing hit count works");
-    test.equal(filter1copy.hitCount, 5, "Hit count of filter copies is also changed");
-    test.equal(filter2.hitCount, 0, "Hit count of other filters isn't affected");
-
-    test.ok(filter1.lastHit === 0 && filter1copy.lastHit === 0 && filter2.lastHit === 0, "Filters have no last hit time initially");
-    filter1.lastHit = 10;
-    test.equal(filter1.lastHit, 10, "Changing last hit time works");
-    test.equal(filter1copy.lastHit, 10, "Last hit time of filter copies is also changed");
-    test.equal(filter2.lastHit, 0, "Last hit time of other filters isn't affected");
-  }
-  finally
-  {
-    filter1.delete();
-    filter1copy.delete();
-    filter2.delete();
-  }
-
-  test.done();
-};
-
-exports.testMatching = function(test)
-{
-  function testMatch(text, location, contentType, docDomain, thirdParty, sitekey, expected)
-  {
-    let filter = Filter.fromText(text);
-    test.equal(filter.matches(location), expected, "Result of filter " + text + " matching " + location);
-    filter.delete();
-
-    filter = Filter.fromText("@@" + text)
-    test.equal(filter.matches(location), expected, "Result of filter @@" + text + " matching " + location);
-    filter.delete();
-  }
-
-  // Basic filters
-  testMatch("abc", "http://abc/adf", "IMAGE", null, false, null, true);
-  testMatch("abc", "http://ABC/adf", "IMAGE", null, false, null, true);
-  testMatch("abc", "http://abd/adf", "IMAGE", null, false, null, false);
-  testMatch("|abc", "http://abc/adf", "IMAGE", null, false, null, false);
-  testMatch("|http://abc", "http://abc/adf", "IMAGE", null, false, null, true);
-  testMatch("abc|", "http://abc/adf", "IMAGE", null, false, null, false);
-  testMatch("abc/adf|", "http://abc/adf", "IMAGE", null, false, null, true);
-  testMatch("||example.com/foo", "http://example.com/foo/bar", "IMAGE", null, false, null, true);
-  testMatch("||com/foo", "http://example.com/foo/bar", "IMAGE", null, false, null, true);
-  testMatch("||mple.com/foo", "http://example.com/foo/bar", "IMAGE", null, false, null, false);
-  testMatch("||/example.com/foo", "http://example.com/foo/bar", "IMAGE", null, false, null, false);
-  testMatch("||example.com/foo/bar|", "http://example.com/foo/bar", "IMAGE", null, false, null, true);
-  testMatch("||example.com/foo", "http://foo.com/http://example.com/foo/bar", "IMAGE", null, false, null, false);
-  testMatch("||example.com/foo|", "http://example.com/foo/bar", "IMAGE", null, false, null, false);
-
-  // Separator placeholders
-  testMatch("abc^d", "http://abc/def", "IMAGE", null, false, null, true);
-  testMatch("abc^e", "http://abc/def", "IMAGE", null, false, null, false);
-  testMatch("def^", "http://abc/def", "IMAGE", null, false, null, true);
-  testMatch("http://abc/d^f", "http://abc/def", "IMAGE", null, false, null, false);
-  testMatch("http://abc/def^", "http://abc/def", "IMAGE", null, false, null, true);
-  testMatch("^foo=bar^", "http://abc/?foo=bar", "IMAGE", null, false, null, true);
-  testMatch("^foo=bar^", "http://abc/?a=b&foo=bar", "IMAGE", null, false, null, true);
-  testMatch("^foo=bar^", "http://abc/?foo=bar&a=b", "IMAGE", null, false, null, true);
-  testMatch("^foo=bar^", "http://abc/?notfoo=bar", "IMAGE", null, false, null, false);
-  testMatch("^foo=bar^", "http://abc/?foo=barnot", "IMAGE", null, false, null, false);
-  testMatch("^foo=bar^", "http://abc/?foo=bar%2Enot", "IMAGE", null, false, null, false);
-  testMatch("||example.com^", "http://example.com/foo/bar", "IMAGE", null, false, null, true);
-  testMatch("||example.com^", "http://example.company.com/foo/bar", "IMAGE", null, false, null, false);
-  testMatch("||example.com^", "http://example.com:1234/foo/bar", "IMAGE", null, false, null, true);
-  testMatch("||example.com^", "http://example.com.com/foo/bar", "IMAGE", null, false, null, false);
-  testMatch("||example.com^", "http://example.com-company.com/foo/bar", "IMAGE", null, false, null, false);
-  testMatch("||example.com^foo", "http://example.com/foo/bar", "IMAGE", null, false, null, true);
-  testMatch("||пример.ру^", "http://пример.ру/foo/bar", "IMAGE", null, false, null, true);
-  testMatch("||пример.ру^", "http://пример.руководитель.ру/foo/bar", "IMAGE", null, false, null, false);
-  testMatch("||пример.ру^", "http://пример.ру:1234/foo/bar", "IMAGE", null, false, null, true);
-  testMatch("||пример.ру^", "http://пример.ру.ру/foo/bar", "IMAGE", null, false, null, false);
-  testMatch("||пример.ру^", "http://пример.ру-ководитель.ру/foo/bar", "IMAGE", null, false, null, false);
-  testMatch("||пример.ру^foo", "http://пример.ру/foo/bar", "IMAGE", null, false, null, true);
-
-  // Wildcard matching
-  testMatch("abc*d", "http://abc/adf", "IMAGE", null, false, null, true);
-  testMatch("abc*d", "http://abcd/af", "IMAGE", null, false, null, true);
-  testMatch("abc*d", "http://abc/d/af", "IMAGE", null, false, null, true);
-  testMatch("abc*d", "http://dabc/af", "IMAGE", null, false, null, false);
-  testMatch("*abc", "http://abc/adf", "IMAGE", null, false, null, true);
-  testMatch("abc*", "http://abc/adf", "IMAGE", null, false, null, true);
-  testMatch("|*abc", "http://abc/adf", "IMAGE", null, false, null, true);
-  testMatch("abc*|", "http://abc/adf", "IMAGE", null, false, null, true);
-  testMatch("abc***d", "http://abc/adf", "IMAGE", null, false, null, true);
-
-  // Regular expressions
-  testMatch("/abc/", "http://abc/adf", "IMAGE", null, false, null, true);
-  testMatch("/abc/", "http://abcd/adf", "IMAGE", null, false, null, true);
-  testMatch("*/abc/", "http://abc/adf", "IMAGE", null, false, null, true);
-  testMatch("*/abc/", "http://abcd/adf", "IMAGE", null, false, null, false);
-  testMatch("/a\\wc/", "http://abc/adf", "IMAGE", null, false, null, true);
-  testMatch("/a\\wc/", "http://a1c/adf", "IMAGE", null, false, null, true);
-  testMatch("/a\\wc/", "http://a_c/adf", "IMAGE", null, false, null, true);
-  testMatch("/a\\wc/", "http://a%c/adf", "IMAGE", null, false, null, false);
-
-  test.done();
-};
+  test.ok(!filter1.disabled && !filter1copy.disabled && !filter2.disabled, "Filters are initially enabled");
+  filter1.disabled = true;
+  test.ok(filter1.disabled, "Disabling filter works");
+  test.ok(filter1copy.disabled, "Filter copies are also disabled");
+  test.ok(!filter2.disabled, "Disabling one filter doesn't disable others");
+
+  test.ok(filter1.hitCount === 0 && filter1copy.hitCount === 0 && filter2.hitCount === 0, "Filters have no hit initially");
+  filter1.hitCount = 5;
+  test.equal(filter1.hitCount, 5, "Changing hit count works");
+  test.equal(filter1copy.hitCount, 5, "Hit count of filter copies is also changed");
+  test.equal(filter2.hitCount, 0, "Hit count of other filters isn't affected");
+
+  test.ok(filter1.lastHit === 0 && filter1copy.lastHit === 0 && filter2.lastHit === 0, "Filters have no last hit time initially");
+  filter1.lastHit = 10;
+  test.equal(filter1.lastHit, 10, "Changing last hit time works");
+  test.equal(filter1copy.lastHit, 10, "Last hit time of filter copies is also changed");
+  test.equal(filter2.lastHit, 0, "Last hit time of other filters isn't affected");
+
+  filter1.delete();
+  filter1copy.delete();
+  filter2.delete();
+
+  test.done();
+};
+
+exports.testIsGeneric = function(test)
+{
+  let tests = [
+    ["asfd", true],
+    ["|http://example.com/asdf", true],
+    ["||example.com/asdf", true],
+    ["asfd$third-party", true],
+    ["asdf$domain=com", false],
+    ["asdf$domain=example.com", false],
+    ["asdf$image,domain=example.com", false],
+    ["asdf$~image,domain=example.com", false],
+    ["asdf$third-party,domain=example.com", false],
+    ["||example.com/asdf$~coLLapse,domain=example.com", false],
+    ["||example.com/asdf$domain=~example.com", true],
+    ["||example.com/asdf$third-party,domain=~example.com", true],
+    ["asdf$domain=foo.example.com|~example.com", false],
+    ["asdf$domain=foo.com|~example.com", false],
+    ["asdf$domain=~foo.com|~example.com", true],
+  ];
+
+  for (let [text, generic] of tests)
+  {
+    let filter = Filter.fromText(text);
+    test.equal(filter.isGeneric(), generic, "Filter " + text + " is generic");
+    filter.delete();
+  }
+
+  test.done();
+}
+
+exports.testElemHideSelector = function(test)
+{
+  function doTest(text, selector, selectorDomain)
+  {
+    let filter = Filter.fromText(text);
+    test.equal(filter.selector, selector, "Correct selector for " + text);
+
+    let actualDomains = filter.selectorDomain.split(",").sort().join(",");
+    let expectedDomains = selectorDomain.split(",").sort().join(",");
+    test.equal(actualDomains, expectedDomains, "Correct domains list for " + text);
+
+    filter.delete();
+  }
+
+  let tests = [
+    ["##foobar", "foobar", ""],
+    ["~example.com##foobar", "foobar", ""],
+    ["example.com##body > div:first-child", "body > div:first-child", "example.com"],
+    ["xYz,~example.com##foobar:not(whatever)", "foobar:not(whatever)","xyz"],
+    ["~xyz,com,~abc.com,example.info##foobar", "foobar", "com,example.info"],
+    ["foo,bar,bas,bam##foobar", "foobar", "foo,bar,bas,bam"],
+
+    // Good idea to test this? Maybe consider behavior undefined in this case.
+    ["foo,bar,bas,~bar##foobar", "foobar", "foo,bas"],
+  ];
+
+  for (let [text, selector, selectorDomain] of tests)
+  {
+    doTest(text, selector, selectorDomain);
+    doTest(text.replace("##", "#@#"), selector, selectorDomain);
+  }
+
+  test.done();
+};
+
+exports.testCSSRules = function(test)
+{
+  let tests = [
+    ["foo.com##[-abp-properties='abc']", "abc", "", ""],
+    ["foo.com##[-abp-properties='a\"bc']", "a\\\"bc", "", ""],
+    ["foo.com##[-abp-properties=\"abc\"]", "abc", "", ""],
+    ["foo.com##[-abp-properties=\"a'bc\"]", "a\\'bc", "", ""],
+    ["foo.com##aaa [-abp-properties='abc'] bbb", "abc", "aaa ", " bbb"],
+    ["foo.com##[-abp-properties='|background-image: url(data:*)']", "^background\\-image\\:\\ url\\(data\\:.*\\)", "", ""],
+  ];
+
+  for (let [text, regexp, prefix, suffix] of tests)
+  {
+    let filter = Filter.fromText(text);
+    test.equal(filter.regexpString, regexp, "Regular expression of " + text);
+    test.equal(filter.selectorPrefix, prefix, "Selector prefix of " + text);
+    test.equal(filter.selectorSuffix, suffix, "Selector suffix of " + text);
+    filter.delete();
+  }
+
+  test.done();
+};