Add InstanceConfig to ConsoleHelpers.

Implement InstanceConfig makes ConsoleHelpers work the same as many
other objects in CakePHP. This consistency is nice for developers.

src/Console/ConsoleIo.php

@@ -381,12 +381,13 @@ class ConsoleIo
      * object has not already been loaded, it will be loaded and constructed.
      *
      * @param string $name The name of the helper to render
-     * @return Cake\Console\Helper The created helper instance.
+     * @param array $settings Configuration data for the helper.
+     * @return \Cake\Console\Helper The created helper instance.
      */
-    public function helper($name)
+    public function helper($name, array $settings = [])
     {
         $name = ucfirst($name);
-        return $this->_helpers->load($name);
+        return $this->_helpers->load($name, $settings);
     }
 
     /**

src/Console/Helper.php

@@ -15,6 +15,7 @@
 namespace Cake\Console;
 
 use Cake\Console\ConsoleIo;
+use Cake\Core\InstanceConfigTrait;
 
 /**
  * Base class for Helpers.
@@ -25,14 +26,25 @@ use Cake\Console\ConsoleIo;
  */
 abstract class Helper
 {
+    use InstanceConfigTrait;
+
+    /**
+     * Default config for this helper.
+     *
+     * @var array
+     */
+    protected $_defaultConfig = [];
+
     /**
-     * Constructor
+     * Constructor.
      *
-     * @param \Cake\Console\ConsoleIo $io An io instance.
+     * @param \Cake\Console\ConsoleIo $io The ConsoleIo instance to use.
+     * @param array $config The settings for this helper.
      */
-    public function __construct(ConsoleIo $io)
+    public function __construct(ConsoleIo $io, array $config = [])
     {
         $this->_io = $io;
+        $this->config($config);
     }
 
     /**

src/Console/HelperRegistry.php

@@ -86,6 +86,6 @@ class HelperRegistry extends ObjectRegistry
      */
     protected function _create($class, $alias, $settings)
     {
-        return new $class($this->_io);
+        return new $class($this->_io, $settings);
     }
 }

tests/TestCase/Console/HelperRegistryTest.php

@@ -51,7 +51,7 @@ class HelperRegistryTest extends TestCase
     }
 
     /**
-     * test triggering callbacks on loaded tasks
+     * test loading helpers.
      *
      * @return void
      */
@@ -66,7 +66,18 @@ class HelperRegistryTest extends TestCase
     }
 
     /**
-     * test missingtask exception
+     * test triggering callbacks on loaded helpers
+     *
+     * @return void
+     */
+    public function testLoadWithConfig()
+    {
+        $result = $this->helpers->load('Simple', ['key' => 'value']);
+        $this->assertEquals('value', $result->config('key'));
+    }
+
+    /**
+     * test missing helper exception
      *
      * @expectedException \Cake\Console\Exception\MissingHelperException
      * @return void