added hook function to appIntegration to handle function-overwrites from other extensions

chrome/content/tests/tests/suffixTreeManipulation.js

Index: chrome/content/tests/tests/suffixTreeManipulation.js
===================================================================
new file mode 100644
--- /dev/null
+++ b/chrome/content/tests/tests/suffixTreeManipulation.js
@@ -0,0 +1,205 @@
+(function()
+{
+  function getModuleGlobal(module)
+  {
+    let result = Cu.getGlobalForObject(require(module));
+    if (result == window)
+    {
+      // Work-around for bug 736316 - getGlobalForObject gave us our own window
+      let {XPIProvider} = Cu.import("resource://gre/modules/XPIProvider.jsm", null);
+      let addonID = "{0fa2149e-bb2c-4ac2-a8d3-479599819475}";
+      if (addonID in XPIProvider.bootstrapScopes)
+        result = XPIProvider.bootstrapScopes[addonID];
+    }
+
+    if ("require" in result)
+      result = result.require.scopes[module];
+    return result;
+  }
+
+  let {onWhitelistEntryAdded, onWhitelistEntryRemoved} = require("rules");
+  let rulesGlobal = getModuleGlobal("rules");
+
+  function saveRules()
+  {
+    this._rulesBackup = rulesGlobal.rules;
+    rulesGlobal.rules = {domain: {}};
+  }
+
+  function restoreRules()
+  {
+    rulesGlobal.rules = this._rulesBackup;
+  }
+
+  module("Suffix tree manipulation", {
+    setup: saveRules,
+    teardown: restoreRules
+  });
+
+  test("Adding entries", function()
+  {
+    let priority = " " + rulesGlobal.CUSTOM_RULE_PRIORITY;
+    let domains = rulesGlobal.rules.domain;
+
+    deepEqual(domains, {}, "Initial state");
+
+    onWhitelistEntryAdded("foo");
+    deepEqual(domains, {
+      "o": "of" + priority
+    }, "Added foo");
+
+    onWhitelistEntryAdded("goo");
+    deepEqual(domains, {
+      "o": {
+        "o": {
+          "f": priority,
+          "g": priority
+        }
+      }
+    }, "Added goo");
+
+    onWhitelistEntryAdded("xyzfoo");
+    deepEqual(domains, {
+      "o": {
+        "o": {
+          "f": {
+            "": priority,
+            "z": "yx" + priority
+          },
+          "g": priority
+        }
+      }
+    }, "Added xyzfoo");
+
+    onWhitelistEntryAdded("o");
+    deepEqual(domains, {
+      "o": {
+        "": priority,
+        "o": {
+          "f": {
+            "": priority,
+            "z": "yx" + priority
+          },
+          "g": priority
+        }
+      }
+    }, "Added o");
+
+    domains.o[""] = " 1234";
+    onWhitelistEntryAdded("o");
+    deepEqual(domains, {
+      "o": {
+        "": priority,
+        "o": {
+          "f": {
+            "": priority,
+            "z": "yx" + priority
+          },
+          "g": priority
+        }
+      }
+    }, "Re-added o");
+  });
+
+  test("Removing entries", function()
+  {
+    let priority = " " + rulesGlobal.CUSTOM_RULE_PRIORITY;
+    let domains = rulesGlobal.rules.domain = {
+      "o": {
+        "": priority,
+        "o": {
+          "f": {
+            "": priority,
+            "z": "yx" + priority
+          },
+          "g": priority
+        }
+      }
+    };
+
+    deepEqual(domains, {
+      "o": {
+        "": priority,
+        "o": {
+          "f": {
+            "": priority,
+            "z": "yx" + priority
+          },
+          "g": priority
+        }
+      }
+    }, "Initial state");
+
+    onWhitelistEntryRemoved("o");
+    deepEqual(domains, {
+      "o": {
+        "o": {
+          "f": {
+            "": priority,
+            "z": "yx" + priority
+          },
+          "g": priority
+        }
+      }
+    }, "Removed o");
+
+    onWhitelistEntryRemoved("go");
+    deepEqual(domains, {
+      "o": {
+        "o": {
+          "f": {
+            "": priority,
+            "z": "yx" + priority
+          },
+          "g": priority
+        }
+      }
+    }, "Removed go");
+
+    onWhitelistEntryRemoved("foo");
+    deepEqual(domains, {
+      "o": {
+        "o": {
+          "f": {
+            "z": "yx" + priority
+          },
+          "g": priority
+        }
+      }
+    }, "Removed foo");
+
+    onWhitelistEntryRemoved("xxyzfoo");
+    deepEqual(domains, {
+      "o": {
+        "o": {
+          "f": {
+            "z": "yx" + priority
+          },
+          "g": priority
+        }
+      }
+    }, "Removed xxyzfoo");
+
+    onWhitelistEntryRemoved("xyzfoo");
+    deepEqual(domains, {
+      "o": {
+        "o": {
+          "f": {
+          },
+          "g": priority
+        }
+      }
+    }, "Removed xyzfoo");
+
+    domains.o.o.g = " 1234";
+    deepEqual(domains, {
+      "o": {
+        "o": {
+          "f": {
+          },
+          "g": " 1234"
+        }
+      }
+    }, "Attempted to remove goo");
+  });
+})();