Move subtask forecast to a plugin

Plugin repo: https://github.com/kanboard/plugin-subtask-forecast

ChangeLog

@@ -10,9 +10,10 @@ New features:
 * Added API procedures: getMyOverdueTasks, getOverdueTasksByProject and GetMyProjects
 * Added user API access for procedure getProjectActivity()
 
-Breaking changes:
+Core functionalities moved to plugins:
 
-* Budget planning is now a plugin and it's not part of core
+* Budget planning: https://github.com/kanboard/plugin-budget
+* SubtaskForecast: https://github.com/kanboard/plugin-subtask-forecast
 
 Improvements:
 

app/Controller/Calendar.php

@@ -52,6 +52,12 @@ class Calendar extends Base
         // Tasks with due date
         $events = array_merge($events, $filter->copy()->filterByDueDateRange($start, $end)->toAllDayCalendarEvents());
 
+        $events = $this->hook->merge('controller:calendar:project:events', $events, array(
+            'project_id' => $project_id,
+            'start' => $start,
+            'end' => $end,
+        ));
+
         $this->response->json($events);
     }
 
@@ -83,10 +89,11 @@ class Calendar extends Base
             $events = array_merge($events, $this->subtaskTimeTracking->getUserCalendarEvents($user_id, $start, $end));
         }
 
-        // Subtask estimates
+        $events = $this->hook->merge('controller:calendar:user:events', $events, array(
-        if ($this->config->get('calendar_user_subtasks_forecast') == 1) {
+            'user_id' => $user_id,
-            $events = array_merge($events, $this->subtaskForecast->getCalendarEvents($user_id, $end));
+            'start' => $start,
-        }
+            'end' => $end,
+        ));
 
         $this->response->json($events);
     }

app/Controller/Config.php

@@ -48,7 +48,7 @@ class Config extends Base
                     $values += array('integration_slack_webhook' => 0, 'integration_hipchat' => 0, 'integration_gravatar' => 0, 'integration_jabber' => 0);
                     break;
                 case 'calendar':
-                    $values += array('calendar_user_subtasks_forecast' => 0, 'calendar_user_subtasks_time_tracking' => 0);
+                    $values += array('calendar_user_subtasks_time_tracking' => 0);
                     break;
             }
 

app/Core/Base.php

@@ -55,7 +55,6 @@ use Pimple\Container;
  * @property \Model\ProjectPermission      $projectPermission
  * @property \Model\Subtask                $subtask
  * @property \Model\SubtaskExport          $subtaskExport
- * @property \Model\SubtaskForecast        $subtaskForecast
  * @property \Model\SubtaskTimeTracking    $subtaskTimeTracking
  * @property \Model\Swimlane               $swimlane
  * @property \Model\Task                   $task

app/Core/Plugin/Hook.php

@@ -0,0 +1,70 @@
+<?php
+
+namespace Core\Plugin;
+
+/**
+ * Plugin Hooks Handler
+ *
+ * @package  plugin
+ * @author   Frederic Guillot
+ */
+class Hook
+{
+    /**
+     * List of hooks
+     *
+     * @access private
+     * @var array
+     */
+    private $hooks = array();
+
+    /**
+     * Bind something on a hook
+     *
+     * @access public
+     * @param  string   $hook
+     * @param  mixed    $value
+     */
+    public function on($hook, $value)
+    {
+        if (! isset($this->hooks[$hook])) {
+            $this->hooks[$hook] = array();
+        }
+
+        $this->hooks[$hook][] = $value;
+    }
+
+    /**
+     * Get all bindings for a hook
+     *
+     * @access public
+     * @param  string  $hook
+     * @return array
+     */
+    public function getListeners($hook)
+    {
+        return isset($this->hooks[$hook]) ? $this->hooks[$hook] : array();
+    }
+
+    /**
+     * Merge listener results with input array
+     *
+     * @access public
+     * @param  string  $hook
+     * @param  array   $values
+     * @param  array   $params
+     * @return array
+     */
+    public function merge($hook, array &$values, array $params = array())
+    {
+        foreach ($this->getListeners($hook) as $listener) {
+            $result = call_user_func_array($listener, $params);
+
+            if (is_array($result) && ! empty($result)) {
+                $values = array_merge($values, $result);
+            }
+        }
+
+        return $values;
+    }
+}

app/Helper/Hook.php

@@ -10,8 +10,6 @@ namespace Helper;
  */
 class Hook extends \Core\Base
 {
-    private $hooks = array();
-
     /**
      * Render all attached hooks
      *
@@ -24,10 +22,8 @@ class Hook extends \Core\Base
     {
         $buffer = '';
 
-        foreach ($this->hooks as $name => $template) {
+        foreach ($this->hook->getListeners($hook) as $template) {
-            if ($hook === $name) {
+            $buffer .= $this->template->render($template, $variables);
-                $buffer .= $this->template->render($template, $variables);
-            }
         }
 
         return $buffer;
@@ -43,7 +39,7 @@ class Hook extends \Core\Base
      */
     public function attach($hook, $template)
     {
-        $this->hooks[$hook] = $template;
+        $this->hook->on($hook, $template);
         return $this;
     }
 }

app/Model/SubtaskForecast.php

@@ -1,124 +0,0 @@
-<?php
-
-namespace Model;
-
-use DateTime;
-use DateInterval;
-
-/**
- * Subtask Forecast
- *
- * @package  model
- * @author   Frederic Guillot
- */
-class SubtaskForecast extends Base
-{
-    /**
-     * Get not completed subtasks with an estimate sorted by postition
-     *
-     * @access public
-     * @param  integer   $user_id
-     * @return array
-     */
-    public function getSubtasks($user_id)
-    {
-        return $this->db
-                    ->table(Subtask::TABLE)
-                    ->columns(Subtask::TABLE.'.id', Task::TABLE.'.project_id', Subtask::TABLE.'.task_id', Subtask::TABLE.'.title', Subtask::TABLE.'.time_estimated')
-                    ->join(Task::TABLE, 'id', 'task_id')
-                    ->asc(Task::TABLE.'.position')
-                    ->asc(Subtask::TABLE.'.position')
-                    ->gt(Subtask::TABLE.'.time_estimated', 0)
-                    ->eq(Subtask::TABLE.'.status', Subtask::STATUS_TODO)
-                    ->eq(Subtask::TABLE.'.user_id', $user_id)
-                    ->findAll();
-    }
-
-    /**
-     * Get the start date for the forecast
-     *
-     * @access public
-     * @param  integer   $user_id
-     * @return array
-     */
-    public function getStartDate($user_id)
-    {
-        $subtask = $this->db->table(Subtask::TABLE)
-                            ->columns(Subtask::TABLE.'.time_estimated', SubtaskTimeTracking::TABLE.'.start')
-                            ->eq(SubtaskTimeTracking::TABLE.'.user_id', $user_id)
-                            ->eq(SubtaskTimeTracking::TABLE.'.end', 0)
-                            ->status('status', Subtask::STATUS_INPROGRESS)
-                            ->join(SubtaskTimeTracking::TABLE, 'subtask_id', 'id')
-                            ->findOne();
-
-        if ($subtask && $subtask['time_estimated'] && $subtask['start']) {
-            return date('Y-m-d H:i', $subtask['start'] + $subtask['time_estimated'] * 3600);
-        }
-
-        return date('Y-m-d H:i');
-    }
-
-    /**
-     * Get all calendar events according to the user timetable and the subtasks estimates
-     *
-     * @access public
-     * @param  integer   $user_id
-     * @param  string    $end         End date of the calendar
-     * @return array
-     */
-    public function getCalendarEvents($user_id, $end)
-    {
-        $events = array();
-        $start_date = new DateTime($this->getStartDate($user_id));
-        $timetable = $this->timetable->calculate($user_id, $start_date, new DateTime($end));
-        $subtasks = $this->getSubtasks($user_id);
-        $total = count($subtasks);
-        $offset = 0;
-
-        foreach ($timetable as $slot) {
-
-            $interval = $this->dateParser->getHours($slot[0], $slot[1]);
-            $start = $slot[0]->getTimestamp();
-
-            if ($slot[0] < $start_date) {
-
-                if (! $this->dateParser->withinDateRange($start_date, $slot[0], $slot[1])) {
-                    continue;
-                }
-
-                $interval = $this->dateParser->getHours(new DateTime, $slot[1]);
-                $start = time();
-            }
-
-            while ($offset < $total) {
-
-                $event = array(
-                    'id' => $subtasks[$offset]['id'].'-'.$subtasks[$offset]['task_id'].'-'.$offset,
-                    'subtask_id' => $subtasks[$offset]['id'],
-                    'title' => t('#%d', $subtasks[$offset]['task_id']).' '.$subtasks[$offset]['title'],
-                    'url' => $this->helper->url->to('task', 'show', array('task_id' => $subtasks[$offset]['task_id'], 'project_id' => $subtasks[$offset]['project_id'])),
-                    'editable' => false,
-                    'start' => date('Y-m-d\TH:i:s', $start),
-                );
-
-                if ($subtasks[$offset]['time_estimated'] <= $interval) {
-
-                    $start += $subtasks[$offset]['time_estimated'] * 3600;
-                    $interval -= $subtasks[$offset]['time_estimated'];
-                    $offset++;
-
-                    $event['end'] = date('Y-m-d\TH:i:s', $start);
-                    $events[] = $event;
-                }
-                else {
-                    $subtasks[$offset]['time_estimated'] -= $interval;
-                    $event['end'] = $slot[1]->format('Y-m-d\TH:i:s');
-                    $events[] = $event;
-                    break;
-                }
-            }
-        }
-
-        return $events;
-    }
-}

app/Schema/Mysql.php

@@ -166,7 +166,6 @@ function version_69($pdo)
     $result = $rq->fetch(PDO::FETCH_ASSOC);
 
     $rq = $pdo->prepare('INSERT INTO settings VALUES (?, ?)');
-    $rq->execute(array('calendar_user_subtasks_forecast', isset($result['subtask_forecast']) && $result['subtask_forecast'] == 1 ? 1 : 0));
     $rq->execute(array('calendar_user_subtasks_time_tracking', 0));
     $rq->execute(array('calendar_user_tasks', 'date_started'));
     $rq->execute(array('calendar_project_tasks', 'date_started'));

app/Schema/Postgres.php

@@ -161,7 +161,6 @@ function version_50($pdo)
     $result = $rq->fetch(PDO::FETCH_ASSOC);
 
     $rq = $pdo->prepare('INSERT INTO settings VALUES (?, ?)');
-    $rq->execute(array('calendar_user_subtasks_forecast', isset($result['subtask_forecast']) && $result['subtask_forecast'] == 1 ? 1 : 0));
     $rq->execute(array('calendar_user_subtasks_time_tracking', 0));
     $rq->execute(array('calendar_user_tasks', 'date_started'));
     $rq->execute(array('calendar_project_tasks', 'date_started'));

app/Schema/Sqlite.php

@@ -138,7 +138,6 @@ function version_68($pdo)
     $result = $rq->fetch(PDO::FETCH_ASSOC);
 
     $rq = $pdo->prepare('INSERT INTO settings VALUES (?, ?)');
-    $rq->execute(array('calendar_user_subtasks_forecast', isset($result['subtask_forecast']) && $result['subtask_forecast'] == 1 ? 1 : 0));
     $rq->execute(array('calendar_user_subtasks_time_tracking', 0));
     $rq->execute(array('calendar_user_tasks', 'date_started'));
     $rq->execute(array('calendar_project_tasks', 'date_started'));

app/ServiceProvider/ClassProvider.php

@@ -41,7 +41,6 @@ class ClassProvider implements ServiceProviderInterface
             'ProjectPermission',
             'Subtask',
             'SubtaskExport',
-            'SubtaskForecast',
             'SubtaskTimeTracking',
             'Swimlane',
             'Task',
@@ -80,6 +79,9 @@ class ClassProvider implements ServiceProviderInterface
         'Core\Cache' => array(
             'MemoryCache',
         ),
+        'Core\Plugin' => array(
+            'Hook',
+        ),
         'Integration' => array(
             'BitbucketWebhook',
             'GithubWebhook',

app/Template/app/sidebar.php

@@ -19,7 +19,7 @@
         <li <?= $this->app->getRouterAction() === 'activity' ? 'class="active"' : '' ?>>
             <?= $this->url->link(t('My activity stream'), 'app', 'activity', array('user_id' => $user['id'])) ?>
         </li>
-        <?= $this->hook->render('dashboard:sidebar') ?>
+        <?= $this->hook->render('template:dashboard:sidebar') ?>
     </ul>
     <div class="sidebar-collapse"><a href="#" title="<?= t('Hide sidebar') ?>"><i class="fa fa-chevron-left"></i></a></div>
     <div class="sidebar-expand" style="display: none"><a href="#" title="<?= t('Expand sidebar') ?>"><i class="fa fa-chevron-right"></i></a></div>

app/Template/config/calendar.php

@@ -23,7 +23,6 @@
 
         <h4><?= t('Subtasks time tracking') ?></h4>
         <?= $this->form->checkbox('calendar_user_subtasks_time_tracking', t('Show subtasks based on the time tracking'), 1, $values['calendar_user_subtasks_time_tracking'] == 1) ?>
-        <?= $this->form->checkbox('calendar_user_subtasks_forecast', t('Show subtask estimates (forecast of future work)'), 1, $values['calendar_user_subtasks_forecast'] == 1) ?>
     </div>
 
     <div class="form-actions">

app/Template/config/sidebar.php

@@ -34,7 +34,7 @@
         <li>
             <?= $this->url->link(t('Documentation'), 'doc', 'show') ?>
         </li>
-        <?= $this->hook->render('config:sidebar') ?>
+        <?= $this->hook->render('template:config:sidebar') ?>
     </ul>
     <div class="sidebar-collapse"><a href="#" title="<?= t('Hide sidebar') ?>"><i class="fa fa-chevron-left"></i></a></div>
     <div class="sidebar-expand" style="display: none"><a href="#" title="<?= t('Expand sidebar') ?>"><i class="fa fa-chevron-right"></i></a></div>

app/Template/export/sidebar.php

@@ -13,7 +13,7 @@
         <li <?= $this->app->getRouterAction() === 'summary' ? 'class="active"' : '' ?>>
             <?= $this->url->link(t('Daily project summary'), 'export', 'summary', array('project_id' => $project['id'])) ?>
         </li>
-        <?= $this->hook->render('export:sidebar') ?>
+        <?= $this->hook->render('template:export:sidebar') ?>
     </ul>
     <div class="sidebar-collapse"><a href="#" title="<?= t('Hide sidebar') ?>"><i class="fa fa-chevron-left"></i></a></div>
     <div class="sidebar-expand" style="display: none"><a href="#" title="<?= t('Expand sidebar') ?>"><i class="fa fa-chevron-right"></i></a></div>

app/Template/layout.php

@@ -29,7 +29,7 @@
 
         <title><?= isset($title) ? $this->e($title) : 'Kanboard' ?></title>
 
-        <?= $this->hook->render('layout:head') ?>
+        <?= $this->hook->render('template:layout:head') ?>
     </head>
     <body data-status-url="<?= $this->url->href('app', 'status') ?>"
           data-login-url="<?= $this->url->href('auth', 'login') ?>"
@@ -40,7 +40,7 @@
     <?php if (isset($no_layout) && $no_layout): ?>
         <?= $content_for_layout ?>
     <?php else: ?>
-        <?= $this->hook->render('layout:top') ?>
+        <?= $this->hook->render('template:layout:top') ?>
         <?= $this->render('header', array(
             'title' => $title,
             'description' => isset($description) ? $description : '',
@@ -50,7 +50,7 @@
             <?= $this->app->flashMessage() ?>
             <?= $content_for_layout ?>
         </section>
-        <?= $this->hook->render('layout:bottom') ?>
+        <?= $this->hook->render('template:layout:bottom') ?>
      <?php endif ?>
     </body>
 </html>

app/Template/project/dropdown.php

@@ -9,7 +9,7 @@
 </li>
 <?php endif ?>
 
-<?= $this->hook->render('project:dropdown', array('project' => $project)) ?>
+<?= $this->hook->render('template:project:dropdown', array('project' => $project)) ?>
 
 <?php if ($this->user->isProjectManagementAllowed($project['id'])): ?>
     <li>

app/Template/project/sidebar.php

@@ -49,7 +49,7 @@
             <?php endif ?>
         <?php endif ?>
 
-        <?= $this->hook->render('project:sidebar') ?>
+        <?= $this->hook->render('template:project:sidebar') ?>
     </ul>
     <div class="sidebar-collapse"><a href="#" title="<?= t('Hide sidebar') ?>"><i class="fa fa-chevron-left"></i></a></div>
     <div class="sidebar-expand" style="display: none"><a href="#" title="<?= t('Expand sidebar') ?>"><i class="fa fa-chevron-right"></i></a></div>

app/Template/project_user/sidebar.php

@@ -25,6 +25,6 @@
             <?= $this->url->link(t('Closed tasks'), 'projectuser', 'closed', $filter) ?>
         </li>
 
-        <?= $this->hook->render('project-user:sidebar') ?>
+        <?= $this->hook->render('template:project-user:sidebar') ?>
     </ul>
 </div>

app/Template/task/sidebar.php

@@ -19,7 +19,7 @@
         </li>
         <?php endif ?>
 
-        <?= $this->hook->render('task:sidebar:information') ?>
+        <?= $this->hook->render('template:task:sidebar:information') ?>
     </ul>
     <h2><?= t('Actions') ?></h2>
     <ul>
@@ -69,7 +69,7 @@
         </li>
         <?php endif ?>
 
-        <?= $this->hook->render('task:sidebar:actions') ?>
+        <?= $this->hook->render('template:task:sidebar:actions') ?>
     </ul>
     <div class="sidebar-collapse"><a href="#" title="<?= t('Hide sidebar') ?>"><i class="fa fa-chevron-left"></i></a></div>
     <div class="sidebar-expand" style="display: none"><a href="#" title="<?= t('Expand sidebar') ?>"><i class="fa fa-chevron-right"></i></a></div>

app/Template/user/sidebar.php

@@ -21,7 +21,7 @@
             </li>
         <?php endif ?>
 
-        <?= $this->hook->render('user:sidebar:information') ?>
+        <?= $this->hook->render('template:user:sidebar:information') ?>
     </ul>
 
     <h2><?= t('Actions') ?></h2>
@@ -67,7 +67,7 @@
             </li>
         <?php endif ?>
 
-        <?= $this->hook->render('user:sidebar:actions', array('user' => $user)) ?>
+        <?= $this->hook->render('template:user:sidebar:actions', array('user' => $user)) ?>
 
         <?php if ($this->user->isAdmin() && ! $this->user->isCurrentUser($user['id'])): ?>
             <li <?= $this->app->getRouterController() === 'user' && $this->app->getRouterAction() === 'remove' ? 'class="active"' : '' ?>>

doc/plugins.markdown

@@ -53,7 +53,7 @@ class Plugin extends Plugin\Base
 {
     public function initialize()
     {
-        $this->template->hook->attach('layout:head', 'theme:layout/head');
+        $this->template->hook->attach('template:layout:head', 'theme:layout/head');
     }
 }
 ```
@@ -65,7 +65,7 @@ The only required method is `initialize()`. This method is called for each reque
 Plugin methods
 --------------
 
-Available methods from `Plugin\Base`:
+Available methods from `Core\Plugin\Base`:
 
 - `initialize()`: Executed when the plugin is loaded
 - `getClasses()`: Return all classes that should be stored in the dependency injection container
@@ -79,6 +79,60 @@ This example will fetch the user #123:
 $this->user->getById(123);
 ```
 
+Application Hooks
+-----------------
+
+Hooks can extend, replace, filter data or change the default behavior. Each hook is identified with a unique name, example: `controller:calendar:user:events`
+
+### Listen on hook events
+
+In your `initialize()` method you need to call the method `on()` of the class `Core\Plugin\Hook`:
+
+```php
+$this->hook->on('hook_name', $callable);
+```
+
+The first argument is the name of the hook and the second is a PHP callable.
+
+### Merge hooks
+
+"Merge hooks" act in the same way as the function `array_merge`. The hook callback must return an array. This array will be merged with the default one.
+
+Example to add events in the user calendar:
+
+```php
+class Plugin extends Base
+{
+    public function initialize()
+    {
+        $container = $this->container;
+
+        $this->hook->on('controller:calendar:user:events', function($user_id, $start, $end) use ($container) {
+            $model = new SubtaskForecast($container);
+            return $model->getCalendarEvents($user_id, $end); // Return new events
+        });
+    }
+}
+```
+
+List of merge hooks:
+
+#### controller:calendar:project:events
+
+- Add more events to the project calendar
+- Arguments:
+    - `$project_id` (integer)
+    - `$start` Calendar start date (string, ISO-8601 format)
+    - `$end` Calendar` end date (string, ISO-8601 format)
+
+#### controller:calendar:user:events
+
+- Add more events to the user calendar
+- Arguments:
+    - `$user_id` (integer)
+    - `$start` Calendar start date (string, ISO-8601 format)
+    - `$end` Calendar end date (string, ISO-8601 format)
+
 Template hooks
 --------------
 
@@ -87,7 +141,7 @@ Template hooks allow to add new content in existing templates.
 Example to add new content in the dashboard sidebar:
 
 ```php
-$this->template->hook->attach('dashboard:sidebar', 'myplugin:dashboard/sidebar');
+$this->template->hook->attach('template:dashboard:sidebar', 'myplugin:dashboard/sidebar');
 ```
 
 This call is usually defined in the `initialize()` method. 
@@ -106,18 +160,18 @@ Template name without prefix are core templates.
 
 List of template hooks:
 
-- `dashboard:sidebar`
+- `template:dashboard:sidebar`
-- `config:sidebar`
+- `template:config:sidebar`
-- `export:sidebar`
+- `template:export:sidebar`
-- `layout:head`
+- `template:layout:head`
-- `layout:top`
+- `template:layout:top`
-- `layout:bottom`
+- `template:layout:bottom`
-- `project:dropdown`
+- `template:project:dropdown`
-- `project-user:sidebar`
+- `template:project-user:sidebar`
-- `task:sidebar:information`
+- `template:task:sidebar:information`
-- `task:sidebar:actions`
+- `template:task:sidebar:actions`
-- `user:sidebar:information`
+- `template:user:sidebar:information`
-- `user:sidebar:actions`
+- `template:user:sidebar:actions`
 
 Other template hooks can be added if necessary, just ask on the issue tracker.
 

tests/units/Core/Plugin/HookTest.php

@@ -0,0 +1,62 @@
+<?php
+
+require_once __DIR__.'/../../Base.php';
+
+use Core\Plugin\Hook;
+
+class HookTest extends Base
+{
+    public function testGetListeners()
+    {
+        $h = new Hook;
+        $this->assertEmpty($h->getListeners('myhook'));
+
+        $h->on('myhook', 'A');
+        $h->on('myhook', 'B');
+
+        $this->assertEquals(array('A', 'B'), $h->getListeners('myhook'));
+    }
+
+    public function testMergeWithNoBinding()
+    {
+        $h = new Hook;
+        $values = array('A', 'B');
+
+        $result = $h->merge('myhook', $values, array('p' => 'c'));
+        $this->assertEquals($values, $result);
+    }
+
+    public function testMergeWithBindings()
+    {
+        $h = new Hook;
+        $values = array('A', 'B');
+        $expected = array('A', 'B', 'c', 'D');
+
+        $h->on('myhook', function($p) {
+            return array($p);
+        });
+
+        $h->on('myhook', function() {
+            return array('D');
+        });
+
+        $result = $h->merge('myhook', $values, array('p' => 'c'));
+        $this->assertEquals($expected, $result);
+        $this->assertEquals($expected, $values);
+    }
+
+    public function testMergeWithBindingButReturningBadData()
+    {
+        $h = new Hook;
+        $values = array('A', 'B');
+        $expected = array('A', 'B');
+
+        $h->on('myhook', function() {
+            return 'string';
+        });
+
+        $result = $h->merge('myhook', $values);
+        $this->assertEquals($expected, $result);
+        $this->assertEquals($expected, $values);
+    }
+}

tests/units/Helper/HookHelperTest.php

@@ -0,0 +1,40 @@
+<?php
+
+require_once __DIR__.'/../Base.php';
+
+use Helper\Hook;
+
+class HookHelperTest extends Base
+{
+    public function testMultipleHooks()
+    {
+        $this->container['template'] = $this
+            ->getMockBuilder('\Core\Template')
+            ->setConstructorArgs(array($this->container))
+            ->setMethods(array('render'))
+            ->getMock();
+
+        $this->container['template']
+            ->expects($this->at(0))
+            ->method('render')
+            ->with(
+                $this->equalTo('tpl1'),
+                $this->equalTo(array())
+            )
+            ->will($this->returnValue('tpl1_content'));
+
+        $this->container['template']
+            ->expects($this->at(1))
+            ->method('render')
+            ->with(
+                $this->equalTo('tpl2'),
+                $this->equalTo(array())
+            )
+            ->will($this->returnValue('tpl2_content'));
+
+        $h = new Hook($this->container);
+        $h->attach('test', 'tpl1');
+        $h->attach('test', 'tpl2');
+        $this->assertEquals('tpl1_contenttpl2_content', $h->render('test'));
+    }
+}