Issue 4231 - Fix unstable FilterEngineTest.testSetRemoveFilterChangeCallback

libadblockplus-android-tests/src/org/adblockplus/libadblockplus/tests/FilterEngineTest.java

Index: libadblockplus-android-tests/src/org/adblockplus/libadblockplus/tests/FilterEngineTest.java
diff --git a/libadblockplus-android-tests/src/org/adblockplus/libadblockplus/tests/FilterEngineTest.java b/libadblockplus-android-tests/src/org/adblockplus/libadblockplus/tests/FilterEngineTest.java
index c1c74ba74fbae17b0e906f136177d9ae0c4ed077..bc054950d004babf4183934443fbd86ef7452237 100644
--- a/libadblockplus-android-tests/src/org/adblockplus/libadblockplus/tests/FilterEngineTest.java
+++ b/libadblockplus-android-tests/src/org/adblockplus/libadblockplus/tests/FilterEngineTest.java
@@ -17,9 +17,9 @@
 
 package org.adblockplus.libadblockplus.tests;
 
-import android.util.Log;
 import org.adblockplus.libadblockplus.Filter;
 import org.adblockplus.libadblockplus.FilterEngine;
+import org.adblockplus.libadblockplus.LazyWebRequest;
 import org.adblockplus.libadblockplus.MockFilterChangeCallback;
 import org.adblockplus.libadblockplus.Subscription;
 
@@ -27,358 +27,370 @@ import org.junit.Test;
 
 public class FilterEngineTest extends FilterEngineGenericTest
 {
-    @Test
-    public void testFilterCreation()
+  @Test
+  public void testFilterCreation()
+  {
+    Filter filter1 = filterEngine.getFilter("foo");
+    assertEquals(Filter.Type.BLOCKING, filter1.getType());
+    Filter filter2 = filterEngine.getFilter("@@foo");
+    assertEquals(Filter.Type.EXCEPTION, filter2.getType());
+    Filter filter3 = filterEngine.getFilter("example.com##foo");
+    assertEquals(Filter.Type.ELEMHIDE, filter3.getType());
+    Filter filter4 = filterEngine.getFilter("example.com#@#foo");
+    assertEquals(Filter.Type.ELEMHIDE_EXCEPTION, filter4.getType());
+    Filter filter5 = filterEngine.getFilter("  foo  ");
+    assertEquals(filter1, filter5);
+  }
+
+  @Test
+  public void testAddRemoveFilters()
+  {
+    while (filterEngine.getListedFilters().size() > 0)
     {
-        Filter filter1 = filterEngine.getFilter("foo");
-        assertEquals(Filter.Type.BLOCKING, filter1.getType());
-        Filter filter2 = filterEngine.getFilter("@@foo");
-        assertEquals(Filter.Type.EXCEPTION, filter2.getType());
-        Filter filter3 = filterEngine.getFilter("example.com##foo");
-        assertEquals(Filter.Type.ELEMHIDE, filter3.getType());
-        Filter filter4 = filterEngine.getFilter("example.com#@#foo");
-        assertEquals(Filter.Type.ELEMHIDE_EXCEPTION, filter4.getType());
-        Filter filter5 = filterEngine.getFilter("  foo  ");
-        assertEquals(filter1, filter5);
+      filterEngine.getListedFilters().get(0).removeFromList();
     }
 
-    @Test
-    public void testAddRemoveFilters()
+    assertEquals(0, filterEngine.getListedFilters().size());
+    Filter filter = filterEngine.getFilter("foo");
+    assertEquals(0, filterEngine.getListedFilters().size());
+    assertFalse(filter.isListed());
+
+    filter.addToList();
+    assertEquals(1, filterEngine.getListedFilters().size());
+    assertEquals(filter, filterEngine.getListedFilters().get(0));
+    assertTrue(filter.isListed());
+
+    filter.addToList();
+    assertEquals(1, filterEngine.getListedFilters().size());
+    assertEquals(filter, filterEngine.getListedFilters().get(0));
+    assertTrue(filter.isListed());
+
+    filter.removeFromList();
+    assertEquals(0, filterEngine.getListedFilters().size());
+    assertFalse(filter.isListed());
+
+    filter.removeFromList();
+    assertEquals(0, filterEngine.getListedFilters().size());
+    assertFalse(filter.isListed());
+  }
+
+  @Test
+  public void testAddRemoveSubscriptions()
+  {
+    while (filterEngine.getListedSubscriptions().size() > 0)
     {
-        while (filterEngine.getListedFilters().size() > 0)
-            filterEngine.getListedFilters().get(0).removeFromList();
-
-        assertEquals(0, filterEngine.getListedFilters().size());
-        Filter filter = filterEngine.getFilter("foo");
-        assertEquals(0, filterEngine.getListedFilters().size());
-        assertFalse(filter.isListed());
-
-        filter.addToList();
-        assertEquals(1, filterEngine.getListedFilters().size());
-        assertEquals(filter, filterEngine.getListedFilters().get(0));
-        assertTrue(filter.isListed());
-
-        filter.addToList();
-        assertEquals(1, filterEngine.getListedFilters().size());
-        assertEquals(filter, filterEngine.getListedFilters().get(0));
-        assertTrue(filter.isListed());
-
-        filter.removeFromList();
-        assertEquals(0, filterEngine.getListedFilters().size());
-        assertFalse(filter.isListed());
-
-        filter.removeFromList();
-        assertEquals(0, filterEngine.getListedFilters().size());
-        assertFalse(filter.isListed());
+      filterEngine.getListedSubscriptions().get(0).removeFromList();
     }
 
-    @Test
-    public void testAddRemoveSubscriptions()
-    {
-        while (filterEngine.getListedSubscriptions().size() > 0)
-            filterEngine.getListedSubscriptions().get(0).removeFromList();
-
-        assertEquals(0, filterEngine.getListedSubscriptions().size());
-        Subscription subscription = filterEngine.getSubscription("foo");
-        assertEquals(0, filterEngine.getListedSubscriptions().size());
-        assertFalse(subscription.isListed());
-        subscription.addToList();
-        assertEquals(1, filterEngine.getListedSubscriptions().size());
-        assertEquals(subscription, filterEngine.getListedSubscriptions().get(0));
-        assertTrue(subscription.isListed());
-        subscription.addToList();
-        assertEquals(1, filterEngine.getListedSubscriptions().size());
-        assertEquals(subscription, filterEngine.getListedSubscriptions().get(0));
-        assertTrue(subscription.isListed());
-        subscription.removeFromList();
-        assertEquals(0, filterEngine.getListedSubscriptions().size());
-        assertFalse(subscription.isListed());
-        subscription.removeFromList();
-        assertEquals(0, filterEngine.getListedSubscriptions().size());
-        assertFalse(subscription.isListed());
-    }
-
-    @Test
-    public void testSubscriptionUpdates()
-    {
-        Subscription subscription = filterEngine.getSubscription("foo");
-        assertFalse(subscription.isUpdating());
-        subscription.updateFilters();
-    }
-
-    @Test
-    public void testMatches()
-    {
-        filterEngine.getFilter("adbanner.gif").addToList();
-        filterEngine.getFilter("@@notbanner.gif").addToList();
-        filterEngine.getFilter("tpbanner.gif$third-party").addToList();
-        filterEngine.getFilter("fpbanner.gif$~third-party").addToList();
-        filterEngine.getFilter("combanner.gif$domain=example.com").addToList();
-        filterEngine.getFilter("orgbanner.gif$domain=~example.com").addToList();
-
-        Filter match1 = filterEngine.matches(
-            "http://example.org/foobar.gif",
-            FilterEngine.ContentType.IMAGE,
-            "");
-        assertNull(match1);
-
-        Filter match2 = filterEngine.matches(
-            "http://example.org/adbanner.gif",
-            FilterEngine.ContentType.IMAGE,
-            "");
-        assertNotNull(match2);
-        assertEquals(Filter.Type.BLOCKING, match2.getType());
-
-        Filter match3 = filterEngine.matches(
-            "http://example.org/notbanner.gif",
-            FilterEngine.ContentType.IMAGE,
-            "");
-        assertNotNull(match3);
-        assertEquals(Filter.Type.EXCEPTION, match3.getType());
-
-        Filter match4 = filterEngine.matches(
-            "http://example.org/notbanner.gif",
-            FilterEngine.ContentType.IMAGE, "");
-        assertNotNull(match4);
-        assertEquals(Filter.Type.EXCEPTION, match4.getType());
-
-        Filter match5 = filterEngine.matches(
-            "http://example.org/tpbanner.gif",
-            FilterEngine.ContentType.IMAGE,
-            "http://example.org/");
-        assertNull(match5);
-
-        Filter match6 = filterEngine.matches(
-            "http://example.org/fpbanner.gif",
-            FilterEngine.ContentType.IMAGE,
-            "http://example.org/");
-        assertNotNull(match6);
-        assertEquals(Filter.Type.BLOCKING, match6.getType());
-
-        Filter match7 = filterEngine.matches(
-            "http://example.org/tpbanner.gif",
-            FilterEngine.ContentType.IMAGE,
-            "http://example.com/");
-        assertNotNull(match7);
-        assertEquals(Filter.Type.BLOCKING, match7.getType());
-
-        Filter match8 = filterEngine.matches(
-            "http://example.org/fpbanner.gif",
-            FilterEngine.ContentType.IMAGE,
-            "http://example.com/");
-        assertNull(match8);
-
-        Filter match9 = filterEngine.matches(
-            "http://example.org/combanner.gif",
-            FilterEngine.ContentType.IMAGE,
-            "http://example.com/");
-        assertNotNull(match9);
-        assertEquals(Filter.Type.BLOCKING, match9.getType());
-
-        Filter match10 = filterEngine.matches(
-            "http://example.org/combanner.gif",
-            FilterEngine.ContentType.IMAGE,
-            "http://example.org/");
-        assertNull(match10);
-
-        Filter match11 = filterEngine.matches(
-            "http://example.org/orgbanner.gif",
-            FilterEngine.ContentType.IMAGE,
-            "http://example.com/");
-        assertNull(match11);
-
-        Filter match12 = filterEngine.matches(
-            "http://example.org/orgbanner.gif",
-            FilterEngine.ContentType.IMAGE,
-            "http://example.org/");
-        assertNotNull(match12);
-        assertEquals(Filter.Type.BLOCKING, match12.getType());
-    }
-
-    @Test
-    public void testMatchesOnWhitelistedDomain()
-    {
-        filterEngine.getFilter("adbanner.gif").addToList();
-        filterEngine.getFilter("@@||example.org^$document").addToList();
-
-        Filter match1 = filterEngine.matches(
-            "http://ads.com/adbanner.gif",
-            FilterEngine.ContentType.IMAGE,
-            "http://example.com/");
-        assertNotNull(match1);
-        assertEquals(Filter.Type.BLOCKING, match1.getType());
-
-        Filter match2 = filterEngine.matches(
-            "http://ads.com/adbanner.gif",
-            FilterEngine.ContentType.IMAGE,
-            "http://example.org/");
-        assertNotNull(match2);
-        assertEquals(Filter.Type.EXCEPTION, match2.getType());
-    }
-
-    @Test
-    public void testMatchesNestedFrameRequest()
-    {
-        filterEngine.getFilter("adbanner.gif").addToList();
-        filterEngine.getFilter("@@adbanner.gif$domain=example.org").addToList();
-
-        Filter match1 = filterEngine.matches(
-            "http://ads.com/adbanner.gif",
-            FilterEngine.ContentType.IMAGE,
-            new String[]
-            {
-                "http://ads.com/frame/",
-                "http://example.com/"
-            });
-        assertNotNull(match1);
-        assertEquals(Filter.Type.BLOCKING, match1.getType());
-
-        Filter match2 = filterEngine.matches(
-            "http://ads.com/adbanner.gif",
-            FilterEngine.ContentType.IMAGE,
-            new String[]
-            {
-                "http://ads.com/frame/",
-                "http://example.org/"
-            });
-        assertNotNull(match2);
-        assertEquals(Filter.Type.EXCEPTION, match2.getType());
-
-        Filter match3 = filterEngine.matches(
-            "http://ads.com/adbanner.gif",
-            FilterEngine.ContentType.IMAGE,
-            new String[]
-            {
-                "http://example.org/",
-                "http://ads.com/frame/"
-            });
-        assertNotNull(match3);
-        assertEquals(Filter.Type.BLOCKING, match3.getType());
-    }
-
-    @Test
-    public void testMatchesNestedFrameOnWhitelistedDomain()
-    {
-        filterEngine.getFilter("adbanner.gif").addToList();
-        filterEngine.getFilter("@@||example.org^$document,domain=ads.com").addToList();
-
-        Filter match1 = filterEngine.matches(
-            "http://ads.com/adbanner.gif",
-            FilterEngine.ContentType.IMAGE,
-            new String[]
-            {
-                "http://ads.com/frame/",
-                "http://example.com/"
-            });
-        assertNotNull(match1);
-        assertEquals(Filter.Type.BLOCKING, match1.getType());
-
-        Filter match2 = filterEngine.matches(
-            "http://ads.com/adbanner.gif",
-            FilterEngine.ContentType.IMAGE,
-            new String[]
-            {
-                "http://ads.com/frame/",
-                "http://example.org/"
-            });
-        assertNotNull(match2);
-        assertEquals(Filter.Type.EXCEPTION, match2.getType());
-
-        Filter match3 = filterEngine.matches(
-            "http://ads.com/adbanner.gif",
-            FilterEngine.ContentType.IMAGE,
-            new String[]
-            {
-                "http://example.org/"
-            });
-        assertNotNull(match3);
-        assertEquals(Filter.Type.BLOCKING, match3.getType());
-
-        Filter match4 = filterEngine.matches(
-            "http://ads.com/adbanner.gif",
-            FilterEngine.ContentType.IMAGE,
-            new String[]
-            {
-                "http://example.org/",
-                "http://ads.com/frame/"
-            });
-        assertNotNull(match4);
-        assertEquals(Filter.Type.BLOCKING, match4.getType());
-
-        Filter match5 = filterEngine.matches(
-            "http://ads.com/adbanner.gif",
-            FilterEngine.ContentType.IMAGE,
-            new String[]
-            {
-                "http://ads.com/frame/",
-                "http://example.org/",
-                "http://example.com/"
-            });
-        assertNotNull(match5);
-        assertEquals(Filter.Type.EXCEPTION, match5.getType());
-    }
-
-    @Test
-    public void testFirstRunFlag()
-    {
-        assertFalse(filterEngine.isFirstRun());
-    }
-
-    @Test
-    public void testSetRemoveFilterChangeCallback()
-    {
-        MockFilterChangeCallback mockFilterChangeCallback = new MockFilterChangeCallback(0);
-
-        filterEngine.setFilterChangeCallback(mockFilterChangeCallback);
-        filterEngine.getFilter("foo").addToList();
-        assertEquals(1, mockFilterChangeCallback.getTimesCalled());
-
-        filterEngine.removeFilterChangeCallback();
-        filterEngine.getFilter("foo").removeFromList();
-        assertEquals(1, mockFilterChangeCallback.getTimesCalled());
-    }
-
-    @Test
-    public void testDocumentWhitelisting()
-    {
-        filterEngine.getFilter("@@||example.org^$document").addToList();
-        filterEngine.getFilter("@@||example.com^$document,domain=example.de").addToList();
-
-        String[] emptyArray = new String[]
+    assertEquals(0, filterEngine.getListedSubscriptions().size());
+    Subscription subscription = filterEngine.getSubscription("foo");
+    assertEquals(0, filterEngine.getListedSubscriptions().size());
+    assertFalse(subscription.isListed());
+    subscription.addToList();
+    assertEquals(1, filterEngine.getListedSubscriptions().size());
+    assertEquals(subscription, filterEngine.getListedSubscriptions().get(0));
+    assertTrue(subscription.isListed());
+    subscription.addToList();
+    assertEquals(1, filterEngine.getListedSubscriptions().size());
+    assertEquals(subscription, filterEngine.getListedSubscriptions().get(0));
+    assertTrue(subscription.isListed());
+    subscription.removeFromList();
+    assertEquals(0, filterEngine.getListedSubscriptions().size());
+    assertFalse(subscription.isListed());
+    subscription.removeFromList();
+    assertEquals(0, filterEngine.getListedSubscriptions().size());
+    assertFalse(subscription.isListed());
+  }
+
+  @Test
+  public void testSubscriptionUpdates()
+  {
+    Subscription subscription = filterEngine.getSubscription("foo");
+    assertFalse(subscription.isUpdating());
+    subscription.updateFilters();
+  }
+
+  @Test
+  public void testMatches()
+  {
+    filterEngine.getFilter("adbanner.gif").addToList();
+    filterEngine.getFilter("@@notbanner.gif").addToList();
+    filterEngine.getFilter("tpbanner.gif$third-party").addToList();
+    filterEngine.getFilter("fpbanner.gif$~third-party").addToList();
+    filterEngine.getFilter("combanner.gif$domain=example.com").addToList();
+    filterEngine.getFilter("orgbanner.gif$domain=~example.com").addToList();
+
+    Filter match1 = filterEngine.matches(
+      "http://example.org/foobar.gif",
+      FilterEngine.ContentType.IMAGE,
+      "");
+    assertNull(match1);
+
+    Filter match2 = filterEngine.matches(
+      "http://example.org/adbanner.gif",
+      FilterEngine.ContentType.IMAGE,
+      "");
+    assertNotNull(match2);
+    assertEquals(Filter.Type.BLOCKING, match2.getType());
+
+    Filter match3 = filterEngine.matches(
+      "http://example.org/notbanner.gif",
+      FilterEngine.ContentType.IMAGE,
+      "");
+    assertNotNull(match3);
+    assertEquals(Filter.Type.EXCEPTION, match3.getType());
+
+    Filter match4 = filterEngine.matches(
+      "http://example.org/notbanner.gif",
+      FilterEngine.ContentType.IMAGE, "");
+    assertNotNull(match4);
+    assertEquals(Filter.Type.EXCEPTION, match4.getType());
+
+    Filter match5 = filterEngine.matches(
+      "http://example.org/tpbanner.gif",
+      FilterEngine.ContentType.IMAGE,
+      "http://example.org/");
+    assertNull(match5);
+
+    Filter match6 = filterEngine.matches(
+      "http://example.org/fpbanner.gif",
+      FilterEngine.ContentType.IMAGE,
+      "http://example.org/");
+    assertNotNull(match6);
+    assertEquals(Filter.Type.BLOCKING, match6.getType());
+
+    Filter match7 = filterEngine.matches(
+      "http://example.org/tpbanner.gif",
+      FilterEngine.ContentType.IMAGE,
+      "http://example.com/");
+    assertNotNull(match7);
+    assertEquals(Filter.Type.BLOCKING, match7.getType());
+
+    Filter match8 = filterEngine.matches(
+      "http://example.org/fpbanner.gif",
+      FilterEngine.ContentType.IMAGE,
+      "http://example.com/");
+    assertNull(match8);
+
+    Filter match9 = filterEngine.matches(
+      "http://example.org/combanner.gif",
+      FilterEngine.ContentType.IMAGE,
+      "http://example.com/");
+    assertNotNull(match9);
+    assertEquals(Filter.Type.BLOCKING, match9.getType());
+
+    Filter match10 = filterEngine.matches(
+      "http://example.org/combanner.gif",
+      FilterEngine.ContentType.IMAGE,
+      "http://example.org/");
+    assertNull(match10);
+
+    Filter match11 = filterEngine.matches(
+      "http://example.org/orgbanner.gif",
+      FilterEngine.ContentType.IMAGE,
+      "http://example.com/");
+    assertNull(match11);
+
+    Filter match12 = filterEngine.matches(
+      "http://example.org/orgbanner.gif",
+      FilterEngine.ContentType.IMAGE,
+      "http://example.org/");
+    assertNotNull(match12);
+    assertEquals(Filter.Type.BLOCKING, match12.getType());
+  }
+
+  @Test
+  public void testMatchesOnWhitelistedDomain()
+  {
+    filterEngine.getFilter("adbanner.gif").addToList();
+    filterEngine.getFilter("@@||example.org^$document").addToList();
+
+    Filter match1 = filterEngine.matches(
+      "http://ads.com/adbanner.gif",
+      FilterEngine.ContentType.IMAGE,
+      "http://example.com/");
+    assertNotNull(match1);
+    assertEquals(Filter.Type.BLOCKING, match1.getType());
+
+    Filter match2 = filterEngine.matches(
+      "http://ads.com/adbanner.gif",
+      FilterEngine.ContentType.IMAGE,
+      "http://example.org/");
+    assertNotNull(match2);
+    assertEquals(Filter.Type.EXCEPTION, match2.getType());
+  }
+
+  @Test
+  public void testMatchesNestedFrameRequest()
+  {
+    filterEngine.getFilter("adbanner.gif").addToList();
+    filterEngine.getFilter("@@adbanner.gif$domain=example.org").addToList();
+
+    Filter match1 = filterEngine.matches(
+      "http://ads.com/adbanner.gif",
+      FilterEngine.ContentType.IMAGE,
+      new String[]
         {
-        };
-
-        assertTrue(filterEngine.isDocumentWhitelisted("http://example.org", emptyArray));
-        assertFalse(filterEngine.isDocumentWhitelisted("http://example.co.uk", emptyArray));
-        assertFalse(filterEngine.isDocumentWhitelisted("http://example.com", emptyArray));
-
-        String[] documentUrls1 = new String[]
+          "http://ads.com/frame/",
+          "http://example.com/"
+        });
+    assertNotNull(match1);
+    assertEquals(Filter.Type.BLOCKING, match1.getType());
+
+    Filter match2 = filterEngine.matches(
+      "http://ads.com/adbanner.gif",
+      FilterEngine.ContentType.IMAGE,
+      new String[]
         {
-            "http://example.de"
-        };
-        assertTrue(filterEngine.isDocumentWhitelisted("http://example.com", documentUrls1));
-        assertFalse(filterEngine.isDocumentWhitelisted("http://example.co.uk", documentUrls1));
-    }
-
-    @Test
-    public void testElemhideWhitelisting()
-    {
-        filterEngine.getFilter("@@||example.org^$elemhide").addToList();
-        filterEngine.getFilter("@@||example.com^$elemhide,domain=example.de").addToList();
-
-        String[] emptyArray = new String[]
+          "http://ads.com/frame/",
+          "http://example.org/"
+        });
+    assertNotNull(match2);
+    assertEquals(Filter.Type.EXCEPTION, match2.getType());
+
+    Filter match3 = filterEngine.matches(
+      "http://ads.com/adbanner.gif",
+      FilterEngine.ContentType.IMAGE,
+      new String[]
         {
-        };
-
-        assertTrue(filterEngine.isElemhideWhitelisted("http://example.org", emptyArray));
-        assertFalse(filterEngine.isElemhideWhitelisted("http://example.co.uk", emptyArray));
-        assertFalse(filterEngine.isElemhideWhitelisted("http://example.com", emptyArray));
-
-        String[] documentUrls1 = new String[]
+          "http://example.org/",
+          "http://ads.com/frame/"
+        });
+    assertNotNull(match3);
+    assertEquals(Filter.Type.BLOCKING, match3.getType());
+  }
+
+  @Test
+  public void testMatchesNestedFrameOnWhitelistedDomain()
+  {
+    filterEngine.getFilter("adbanner.gif").addToList();
+    filterEngine.getFilter("@@||example.org^$document,domain=ads.com").addToList();
+
+    Filter match1 = filterEngine.matches(
+      "http://ads.com/adbanner.gif",
+      FilterEngine.ContentType.IMAGE,
+      new String[]
         {
-            "http://example.de"
-        };
-        assertTrue(filterEngine.isElemhideWhitelisted("http://example.com", documentUrls1));
-        assertFalse(filterEngine.isElemhideWhitelisted("http://example.co.uk", documentUrls1));
-    }
+          "http://ads.com/frame/",
+          "http://example.com/"
+        });
+    assertNotNull(match1);
+    assertEquals(Filter.Type.BLOCKING, match1.getType());
+
+    Filter match2 = filterEngine.matches(
+      "http://ads.com/adbanner.gif",
+      FilterEngine.ContentType.IMAGE,
+      new String[]
+        {
+          "http://ads.com/frame/",
+          "http://example.org/"
+        });
+    assertNotNull(match2);
+    assertEquals(Filter.Type.EXCEPTION, match2.getType());
+
+    Filter match3 = filterEngine.matches(
+      "http://ads.com/adbanner.gif",
+      FilterEngine.ContentType.IMAGE,
+      new String[]
+        {
+          "http://example.org/"
+        });
+    assertNotNull(match3);
+    assertEquals(Filter.Type.BLOCKING, match3.getType());
+
+    Filter match4 = filterEngine.matches(
+      "http://ads.com/adbanner.gif",
+      FilterEngine.ContentType.IMAGE,
+      new String[]
+        {
+          "http://example.org/",
+          "http://ads.com/frame/"
+        });
+    assertNotNull(match4);
+    assertEquals(Filter.Type.BLOCKING, match4.getType());
+
+    Filter match5 = filterEngine.matches(
+      "http://ads.com/adbanner.gif",
+      FilterEngine.ContentType.IMAGE,
+      new String[]
+        {
+          "http://ads.com/frame/",
+          "http://example.org/",
+          "http://example.com/"
+        });
+    assertNotNull(match5);
+    assertEquals(Filter.Type.EXCEPTION, match5.getType());
+  }
+
+  @Test
+  public void testFirstRunFlag()
+  {
+    jsEngine.setWebRequest(new LazyWebRequest());
+    jsEngine.setDefaultLogSystem();
+
+    LazyFileSystem lazyFileSystem = new LazyFileSystem();
+    lazyFileSystem.setPatternsIniExists(false);
+    jsEngine.setFileSystem(lazyFileSystem);
+
+    filterEngine = new FilterEngine(jsEngine);
+    assertTrue(filterEngine.isFirstRun());
+  }
+
+  @Test
+  public void testSetRemoveFilterChangeCallback()
+  {
+    MockFilterChangeCallback mockFilterChangeCallback = new MockFilterChangeCallback(0);
+
+    filterEngine.setFilterChangeCallback(mockFilterChangeCallback);
+    filterEngine.getFilter("foo").addToList();
+    assertEquals(1, mockFilterChangeCallback.getTimesCalled());
+
+    filterEngine.removeFilterChangeCallback();
+    filterEngine.getFilter("foo").removeFromList();
+    assertEquals(1, mockFilterChangeCallback.getTimesCalled());
+  }
+
+  @Test
+  public void testDocumentWhitelisting()
+  {
+    filterEngine.getFilter("@@||example.org^$document").addToList();
+    filterEngine.getFilter("@@||example.com^$document,domain=example.de").addToList();
+
+    String[] emptyArray = new String[]
+      {
+      };
+
+    assertTrue(filterEngine.isDocumentWhitelisted("http://example.org", emptyArray));
+    assertFalse(filterEngine.isDocumentWhitelisted("http://example.co.uk", emptyArray));
+    assertFalse(filterEngine.isDocumentWhitelisted("http://example.com", emptyArray));
+
+    String[] documentUrls1 = new String[]
+      {
+        "http://example.de"
+      };
+    assertTrue(filterEngine.isDocumentWhitelisted("http://example.com", documentUrls1));
+    assertFalse(filterEngine.isDocumentWhitelisted("http://example.co.uk", documentUrls1));
+  }
+
+  @Test
+  public void testElemhideWhitelisting()
+  {
+    filterEngine.getFilter("@@||example.org^$elemhide").addToList();
+    filterEngine.getFilter("@@||example.com^$elemhide,domain=example.de").addToList();
+
+    String[] emptyArray = new String[]
+      {
+      };
+
+    assertTrue(filterEngine.isElemhideWhitelisted("http://example.org", emptyArray));
+    assertFalse(filterEngine.isElemhideWhitelisted("http://example.co.uk", emptyArray));
+    assertFalse(filterEngine.isElemhideWhitelisted("http://example.com", emptyArray));
+
+    String[] documentUrls1 = new String[]
+      {
+        "http://example.de"
+      };
+    assertTrue(filterEngine.isElemhideWhitelisted("http://example.com", documentUrls1));
+    assertFalse(filterEngine.isElemhideWhitelisted("http://example.co.uk", documentUrls1));
+  }
 }