text: // Dependencies
  set_global('$', global.make_zjquery({
      silent: true,
  }));
  set_global('document', {
      hasFocus: function () {
          return true;
      },
  });
  set_global('page_params', {
      is_admin: false,
      realm_users: [],
      enable_desktop_notifications: true,
      enable_sounds: true,
      wildcard_mentions_notify: true,
  });
  const _navigator = {
      userAgent: 'Mozilla/5.0 AppleWebKit/537.36 Chrome/64.0.3282.167 Safari/537.36',
  };
  set_global('navigator', _navigator);
  
  zrequire('alert_words');
  zrequire('muting');
  zrequire('stream_data');
  zrequire('people');
  zrequire('ui');
  
  zrequire('notifications');
  
  // Not muted streams
  const general = {
      subscribed: true,
      name: 'general',
      stream_id: 10,
      is_muted: false,
      wildcard_mentions_notify: null,
  };
  
  // Muted streams
  const muted = {
      subscribed: true,
      name: 'muted',
      stream_id: 20,
      is_muted: true,
      wildcard_mentions_notify: null,
  };
  
  stream_data.add_sub(general);
  stream_data.add_sub(muted);
  
  muting.add_muted_topic(general.stream_id, 'muted topic');
  
  run_test('message_is_notifiable', () => {
      // A notification is sent if both message_is_notifiable(message)
      // and the appropriate should_send_*_notification function return
      // true.
  
      // Case 1: If the message was sent by this user,
      //  DO NOT notify the user
      // In this test, all other circumstances should trigger notification
      // EXCEPT sent_by_me, which should trump them
      let message = {
          id: muted.stream_id,
          content: 'message number 1',
          sent_by_me: true,
          notification_sent: false,
          mentioned: true,
          mentioned_me_directly: true,
          type: 'stream',
          stream: 'general',
          stream_id: general.stream_id,
          topic: 'whatever',
      };
      assert.equal(notifications.should_send_desktop_notification(message), true);
      assert.equal(notifications.should_send_audible_notification(message), true);
      // Not notifiable because it was sent by the current user
      assert.equal(notifications.message_is_notifiable(message), false);
  
      // Case 2: If the user has already been sent a notification about this message,
      //  DO NOT notify the user
      // In this test, all other circumstances should trigger notification
      // EXCEPT notification_sent, which should trump them
      // (ie: it mentions user, it's not muted, etc)
      message = {
          id: general.stream_id,
          content: 'message number 2',
          sent_by_me: false,
          notification_sent: true,
          mentioned: true,
          mentioned_me_directly: true,
          type: 'stream',
          stream: 'general',
          stream_id: general.stream_id,
          topic: 'whatever',
      };
      assert.equal(notifications.should_send_desktop_notification(message), true);
      assert.equal(notifications.should_send_audible_notification(message), true);
      assert.equal(notifications.message_is_notifiable(message), false);
  
      // Case 3: If a message mentions the user directly,
      //  DO notify the user
      // Mentioning trumps muting
      message = {
          id: 30,
          content: 'message number 3',
          sent_by_me: false,
          notification_sent: false,
          mentioned: true,
          mentioned_me_directly: true,
          type: 'stream',
          stream: 'muted',
          stream_id: muted.stream_id,
          topic: 'topic_three',
      };
      assert.equal(notifications.should_send_desktop_notification(message), true);
      assert.equal(notifications.should_send_audible_notification(message), true);
      assert.equal(notifications.message_is_notifiable(message), true);
  
      // Case 4:
      // Mentioning should trigger notification in unmuted topic
      message = {
          id: 40,
          content: 'message number 4',
          sent_by_me: false,
          notification_sent: false,
          mentioned: true,
          mentioned_me_directly: true,
          type: 'stream',
          stream: 'general',
          stream_id: general.stream_id,
          topic: 'vanilla',
      };
      assert.equal(notifications.should_send_desktop_notification(message), true);
      assert.equal(notifications.should_send_audible_notification(message), true);
      assert.equal(notifications.message_is_notifiable(message), true);
  
      // Case 5:
      // Wildcard mention should trigger notification in unmuted topic
      // if wildcard_mentions_notify
      message = {
          id: 40,
          content: 'message number 4',
          sent_by_me: false,
          notification_sent: false,
          mentioned: true,
          mentioned_me_directly: false,
          type: 'stream',
          stream: 'general',
          stream_id: general.stream_id,
          topic: 'vanilla',
      };
      assert.equal(notifications.should_send_desktop_notification(message), true);
      assert.equal(notifications.should_send_audible_notification(message), true);
      assert.equal(notifications.message_is_notifiable(message), true);
  
      // But not if it's disabled
      page_params.wildcard_mentions_notify = false;
      assert.equal(notifications.should_send_desktop_notification(message), false);
      assert.equal(notifications.should_send_audible_notification(message), false);
      assert.equal(notifications.message_is_notifiable(message), true);
  
      // And the stream-level setting overrides the global setting
      general.wildcard_mentions_notify = true;
      assert.equal(notifications.should_send_desktop_notification(message), true);
      assert.equal(notifications.should_send_audible_notification(message), true);
      assert.equal(notifications.message_is_notifiable(message), true);
  
      // Reset state
      page_params.wildcard_mentions_notify = true;
      general.wildcard_mentions_notify = null;
  
      // Case 6: If a message is in a muted stream
      //  and does not mention the user DIRECTLY (i.e. wildcard mention),
      //  DO NOT notify the user
      message = {
          id: 50,
          content: 'message number 5',
          sent_by_me: false,
          notification_sent: false,
          mentioned: true,
          mentioned_me_directly: false,
          type: 'stream',
          stream: 'muted',
          stream_id: muted.stream_id,
          topic: 'whatever',
      };
      assert.equal(notifications.should_send_desktop_notification(message), true);
      assert.equal(notifications.should_send_audible_notification(message), true);
      assert.equal(notifications.message_is_notifiable(message), false);
  
      // Case 7: If a message is in a muted stream
      //  and does mention the user DIRECTLY,
      //  DO notify the user
      message = {
          id: 50,
          content: 'message number 5',
          sent_by_me: false,
          notification_sent: false,
          mentioned: true,
          mentioned_me_directly: true,
          type: 'stream',
          stream: 'muted',
          stream_id: muted.stream_id,
          topic: 'whatever',
      };
      assert.equal(notifications.should_send_desktop_notification(message), true);
      assert.equal(notifications.should_send_audible_notification(message), true);
      assert.equal(notifications.message_is_notifiable(message), true);
  
      // Case 8: If a message is in a muted topic
      //  and does not mention the user DIRECTLY (i.e. wildcard mention),
      //  DO NOT notify the user
      message = {
          id: 50,
          content: 'message number 6',
          sent_by_me: false,
          notification_sent: false,
          mentioned: true,
          mentioned_me_directly: false,
          type: 'stream',
          stream: 'general',
          stream_id: general.stream_id,
          topic: 'muted topic',
      };
      assert.equal(notifications.should_send_desktop_notification(message), true);
      assert.equal(notifications.should_send_audible_notification(message), true);
      assert.equal(notifications.message_is_notifiable(message), false);
  
      // If none of the above cases apply
      // (ie: topic is not muted, message does not mention user,
      //  no notification sent before, message not sent by user),
      // return true to pass it to notifications settings, which will return false.
      message = {
          id: 60,
          content: 'message number 7',
          sent_by_me: false,
          notification_sent: false,
          mentioned: false,
          mentioned_me_directly: false,
          type: 'stream',
          stream: 'general',
          stream_id: general.stream_id,
          topic: 'whatever',
      };
      assert.equal(notifications.should_send_desktop_notification(message), false);
      assert.equal(notifications.should_send_audible_notification(message), false);
      assert.equal(notifications.message_is_notifiable(message), true);
  });
  
  run_test('basic_notifications', () => {
  
      let n; // Object for storing all notification data for assertions.
      let last_closed_message_id = null;
      let last_shown_message_id = null;
  
      // Notifications API stub
      notifications.set_notification_api({
          createNotification: function createNotification(icon, title, content, tag) {
              const notification_object = {icon: icon, body: content, tag: tag};
              // properties for testing.
              notification_object.tests = {
                  shown: false,
              };
              notification_object.show = function () {
                  last_shown_message_id = this.tag;
              };
              notification_object.close = function () {
                  last_closed_message_id = this.tag;
              };
              notification_object.cancel = function () { notification_object.close(); };
              return notification_object;
          },
      });
  
      const message_1 = {
          id: 1000,
          content: '@-mentions the user',
          avatar_url: 'url',
          sent_by_me: false,
          sender_full_name: 'Jesse Pinkman',
          notification_sent: false,
          mentioned_me_directly: true,
          type: 'stream',
          stream: 'general',
          stream_id: muted.stream_id,
          topic: 'whatever',
      };
  
      const message_2 = {
          id: 1500,
          avatar_url: 'url',
          content: '@-mentions the user',
          sent_by_me: false,
          sender_full_name: 'Gus Fring',
          notification_sent: false,
          mentioned_me_directly: true,
          type: 'stream',
          stream: 'general',
          stream_id: muted.stream_id,
          topic: 'lunch',
      };
  
      // Send notification.
      notifications.process_notification({message: message_1, desktop_notify: true});
      n = notifications.get_notifications();
      assert.equal(n.has('Jesse Pinkman to general > whatever'), true);
      assert.equal(n.size, 1);
      assert.equal(last_shown_message_id, message_1.id);
  
      // Remove notification.
      notifications.close_notification(message_1);
      n = notifications.get_notifications();
      assert.equal(n.has('Jesse Pinkman to general > whatever'), false);
      assert.equal(n.size, 0);
      assert.equal(last_closed_message_id, message_1.id);
  
      // Send notification.
      message_1.id = 1001;
      notifications.process_notification({message: message_1, desktop_notify: true});
      n = notifications.get_notifications();
      assert.equal(n.has('Jesse Pinkman to general > whatever'), true);
      assert.equal(n.size, 1);
      assert.equal(last_shown_message_id, message_1.id);
  
      // Process same message again. Notification count shouldn't increase.
      message_1.id = 1002;
      notifications.process_notification({message: message_1, desktop_notify: true});
      n = notifications.get_notifications();
      assert.equal(n.has('Jesse Pinkman to general > whatever'), true);
      assert.equal(n.size, 1);
      assert.equal(last_shown_message_id, message_1.id);
  
      // Send another message. Notification count should increase.
      notifications.process_notification({message: message_2, desktop_notify: true});
      n = notifications.get_notifications();
      assert.equal(n.has('Gus Fring to general > lunch'), true);
      assert.equal(n.has('Jesse Pinkman to general > whatever'), true);
      assert.equal(n.size, 2);
      assert.equal(last_shown_message_id, message_2.id);
  
      // Remove notifications.
      notifications.close_notification(message_1);
      notifications.close_notification(message_2);
      n = notifications.get_notifications();
      assert.equal(n.has('Jesse Pinkman to general > whatever'), false);
      assert.equal(n.size, 0);
      assert.equal(last_closed_message_id, message_2.id);
  });
  