Issue 6992 - Try all keyword candidates when removing a filter

test/matcher.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 273 matching lines @@
 
   test.ok(!matcher.isWhitelisted("https://example.com/foo",
                                  RegExpFilter.typeMap.IMAGE));
   test.ok(!matcher.isWhitelisted("https://example.com/bar",
                                  RegExpFilter.typeMap.IMAGE));
   test.ok(!matcher.isWhitelisted("https://example.com/foo",
                                  RegExpFilter.typeMap.SUBDOCUMENT));
 
   test.done();
 };
+
+exports.testAddRemove = function(test)
+{
+  let matcher = new CombinedMatcher();
+
+  matcher.add(Filter.fromText("||example.com/foo/bar/image.jpg"));
+
+  test.ok(!!matcher.matchesAny("https://example.com/foo/bar/image.jpg",
+                               RegExpFilter.typeMap.IMAGE));
+
+  matcher.remove(Filter.fromText("||example.com/foo/bar/image.jpg"));
+
+  test.ok(!matcher.matchesAny("https://example.com/foo/bar/image.jpg",
+                              RegExpFilter.typeMap.IMAGE));
+
+  test.done();
+};