Add filtered event support to event.js.

chrome/renderer/extensions/event_unittest.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "chrome/test/base/module_system_test.h"
 
 #include "grit/renderer_resources.h"
 
 namespace {
 
 class EventUnittest : public ModuleSystemTest {
   virtual void SetUp() OVERRIDE {
     ModuleSystemTest::SetUp();
     module_system_->RunString("chrome = {};", "setup-chrome");
 
     RegisterModule("event", IDR_EVENT_BINDINGS_JS);
 
     // Mock out the native handler for event_bindings. These mocks will fail if
     // any invariants maintained by the real event_bindings are broken.
     OverrideNativeHandler("event_bindings",
         "var assert = requireNative('assert');"
         "var attachedListeners = exports.attachedListeners = {};"
+        "var attachedFilteredListeners = "
+        "    exports.attachedFilteredListeners = {};"
+        "var nextId = 0;"
+        "var idToName = {};"
+
         "exports.AttachEvent = function(eventName) {"
         "  assert.AssertFalse(!!attachedListeners[eventName]);"
         "  attachedListeners[eventName] = 1;"
         "};"
+
         "exports.DetachEvent = function(eventName) {"
         "  assert.AssertTrue(!!attachedListeners[eventName]);"
         "  delete attachedListeners[eventName];"
+        "};"
+
+        "exports.IsEventAttached = function(eventName) {"
+        "  return !!attachedListeners[eventName];"
+        "};"
+
+        "exports.AttachFilteredEvent = function(name, filter) {"
+        "  var id = nextId++;"
+        "  idToName[id] = name;"
+        "  attachedFilteredListeners[name] ="
+        "    attachedFilteredListeners[name] || [];"
+        "  attachedFilteredListeners[name][id] = filter;"
+        "  return id;"
+        "};"
+
+        "exports.DetachFilteredEvent = function(id, manual) {"
+        "  var i = attachedFilteredListeners[idToName[id]].indexOf(id);"
+        "  attachedFilteredListeners[idToName[id]].splice(i, 1);"
+        "};"
+
+        "exports.HasFilteredListener = function(name) {"
+        "  return attachedFilteredListeners[name].length;"
         "};");
     OverrideNativeHandler("chrome_hidden",
         "var chromeHidden = {};"
         "exports.GetChromeHidden = function() { return chromeHidden; };");
   }
 };
 
 TEST_F(EventUnittest, TestNothing) {
   ExpectNoAssertionsMade();
 }
 
 TEST_F(EventUnittest, AddRemoveTwoListeners) {
   ModuleSystem::NativesEnabledScope natives_enabled_scope(module_system_.get());
   RegisterModule("test",
       "var assert = requireNative('assert');"
       "var event = require('event');"
       "var eventBindings = requireNative('event_bindings');"
       "var myEvent = new event.Event('named-event');"
       "var cb1 = function() {};"
       "var cb2 = function() {};"
       "myEvent.addListener(cb1);"
       "myEvent.addListener(cb2);"
       "myEvent.removeListener(cb1);"
       "assert.AssertTrue(!!eventBindings.attachedListeners['named-event']);"
       "myEvent.removeListener(cb2);"
       "assert.AssertFalse(!!eventBindings.attachedListeners['named-event']);");
   module_system_->Require("test");
 }
 
+TEST_F(EventUnittest, OnUnloadDetachesAllListeners) {
+  ModuleSystem::NativesEnabledScope natives_enabled_scope(module_system_.get());
+  RegisterModule("test",
+      "var assert = requireNative('assert');"
+      "var event = require('event');"
+      "var eventBindings = requireNative('event_bindings');"
+      "var chromeHidden = requireNative('chrome_hidden').GetChromeHidden();"
+      "var myEvent = new event.Event('named-event');"
+      "var cb1 = function() {};"
+      "var cb2 = function() {};"
+      "myEvent.addListener(cb1);"
+      "myEvent.addListener(cb2);"
+      "chromeHidden.dispatchOnUnload();"
+      "assert.AssertFalse(!!eventBindings.attachedListeners['named-event']);");
+  module_system_->Require("test");
+}
+
+TEST_F(EventUnittest, OnUnloadDetachesAllListenersEvenDupes) {
+  ModuleSystem::NativesEnabledScope natives_enabled_scope(module_system_.get());
+  RegisterModule("test",
+      "var assert = requireNative('assert');"
+      "var event = require('event');"
+      "var eventBindings = requireNative('event_bindings');"
+      "var chromeHidden = requireNative('chrome_hidden').GetChromeHidden();"
+      "var myEvent = new event.Event('named-event');"
+      "var cb1 = function() {};"
+      "myEvent.addListener(cb1);"
+      "myEvent.addListener(cb1);"
+      "chromeHidden.dispatchOnUnload();"
+      "assert.AssertFalse(!!eventBindings.attachedListeners['named-event']);");
+  module_system_->Require("test");
+}
+
 TEST_F(EventUnittest, EventsThatSupportRulesMustHaveAName) {
   ModuleSystem::NativesEnabledScope natives_enabled_scope(module_system_.get());
   RegisterModule("test",
       "var event = require('event');"
       "var eventOpts = {supportsRules: true};"
       "var assert = requireNative('assert');"
       "var caught = false;"
       "try {"
       "  var myEvent = new event.Event(undefined, undefined, eventOpts);"
       "} catch (e) {"
@@ skipping 10 matching lines @@
       "var chromeHidden = requireNative('chrome_hidden').GetChromeHidden();"
       "var assert = requireNative('assert');"
       "var e = new event.Event('myevent');"
       "var called = false;"
       "e.addListener(function() { called = true; });"
       "chromeHidden.Event.dispatch('myevent', []);"
       "assert.AssertTrue(called);");
   module_system_->Require("test");
 }
 
+TEST_F(EventUnittest, AddListenerWithFiltersThrowsErrorByDefault) {
+  ModuleSystem::NativesEnabledScope natives_enabled_scope(module_system_.get());
+  RegisterModule("test",
+      "var event = require('event');"
+      "var assert = requireNative('assert');"
+      "var e = new event.Event('myevent');"
+      "var filter = {"
+      "  'hostSuffix': 'google.com',"

[Matt Perry, 2012/05/15 19:28:27]

this filter should be url: {etc}

[koz (OOO until 15th September), 2012/05/16 01:26:12]

Fixed here and elsewhere where the 'url' field was a {} not a [{}]. (Test added,
too.)

+      "};"
+      "var caught = false;"
+      "try {"
+      "  e.addListener(function() {}, filter);"
+      "} catch (e) {"
+      "  caught = true;"
+      "}"
+      "assert.AssertTrue(caught);");
+  module_system_->Require("test");
+}
+
+TEST_F(EventUnittest, FilteredEventsAttachment) {
+  ModuleSystem::NativesEnabledScope natives_enabled_scope(module_system_.get());
+  RegisterModule("test",
+      "var event = require('event');"
+      "var assert = requireNative('assert');"
+      "var bindings = requireNative('event_bindings');"
+      "var eventOpts = {supportsListeners: true, supportsFilters: true};"
+      "var e = new event.Event('myevent', undefined, eventOpts);"
+      "var cb = function() {};"
+      "var filters = {url: {hostSuffix: 'google.com'}};"
+      "e.addListener(cb, filters);"
+      "assert.AssertTrue(bindings.HasFilteredListener('myevent'));"
+      "e.removeListener(cb);"
+      "assert.AssertFalse(bindings.HasFilteredListener('myevent'));");
+  module_system_->Require("test");
+}
+
+TEST_F(EventUnittest, DetachFilteredEvent) {
+  ModuleSystem::NativesEnabledScope natives_enabled_scope(module_system_.get());
+  RegisterModule("test",
+      "var event = require('event');"
+      "var assert = requireNative('assert');"
+      "var bindings = requireNative('event_bindings');"
+      "var eventOpts = {supportsListeners: true, supportsFilters: true};"
+      "var e = new event.Event('myevent', undefined, eventOpts);"
+      "var cb1 = function() {};"
+      "var cb2 = function() {};"
+      "var filters = {url: {hostSuffix: 'google.com'}};"
+      "e.addListener(cb1, filters);"
+      "e.addListener(cb2, filters);"
+      "e.detach();"
+      "assert.AssertFalse(bindings.HasFilteredListener('myevent'));");
+  module_system_->Require("test");
+}
+
+TEST_F(EventUnittest, AttachAndRemoveSameFilteredEventListener) {
+  ModuleSystem::NativesEnabledScope natives_enabled_scope(module_system_.get());
+  RegisterModule("test",
+      "var event = require('event');"
+      "var assert = requireNative('assert');"
+      "var bindings = requireNative('event_bindings');"
+      "var eventOpts = {supportsListeners: true, supportsFilters: true};"
+      "var e = new event.Event('myevent', undefined, eventOpts);"
+      "var cb = function() {};"
+      "var filters = {url: {hostSuffix: 'google.com'}};"
+      "e.addListener(cb, filters);"
+      "e.addListener(cb, filters);"
+      "assert.AssertTrue(bindings.HasFilteredListener('myevent'));"
+      "e.removeListener(cb);"
+      "assert.AssertTrue(bindings.HasFilteredListener('myevent'));"
+      "e.removeListener(cb);"
+      "assert.AssertFalse(bindings.HasFilteredListener('myevent'));");
+  module_system_->Require("test");
+}
+
 }  // namespace