<?php defined('SYSPATH') OR die('Kohana bootstrap needs to be included before tests run');

/**
 * Tests the Config group lib
 *
 * @group kohana
 * @group kohana.config
 *
 * @package    Unittest
 * @author     Kohana Team
 * @author     Jeremy Bush <contractfrombelow@gmail.com>
 * @author     Matt Button <matthew@sigswitch.com>
 * @copyright  (c) 2008-2012 Kohana Team
 * @license    http://kohanaphp.com/license
 */
class Kohana_Config_GroupTest extends Kohana_Unittest_TestCase
{
	/**
	 * Create a mock Kohana_Config instance
	 *
	 * @return Kohana_Config
	 */
	public function get_mock_config()
	{
		return new Kohana_Config;
	}

	/**
	 * Gets a fresh instance of Kohana_Config_Group
	 *
	 * @param string        $group    Config Group name
	 * @param array         $config   Configuration
	 * @param Kohana_Config $instance Instance of Kohana_Config
	 * @return Kohana_Config_Group
	 */
	public function get_mock_group($group, $config = array(), $instance = NULL)
	{
		if ($instance === NULL)
		{
			$instance = $this->get_mock_config();
		}

		return new Kohana_Config_Group($instance, $group, $config);
	}

	/**
	 * The group name and group's config values should be loaded into the object
	 * by the constructor
	 *
	 * @test
	 * @covers Kohana_Config_Group
	 */
	public function test_loads_group_name_and_values_in_constructor()
	{
		$group_name   = 'information';
		$group_values = array('var' => 'value');

		$group = $this->get_mock_group($group_name, $group_values);

		// Now usually we'd just use assertAttributeSame, but that tries to get at protected properties
		// by casting the object in question into an array.  This usually works fine, but as Kohana_Config_Group
		// is a subclass of ArrayObject, casting to an array returns the config items!
		// Therefore we have to use this little workaround
		$this->assertSame($group_name,   $group->group_name());
		$this->assertSame($group_values, $group->getArrayCopy());
	}

	/**
	 * A config group may not exist (or may not have any values) when it is loaded.
	 * The config group should allow for this situation and not complain
	 *
	 * @test
	 * @covers Kohana_Config_Group
	 */
	public function test_allows_empty_group_values()
	{
		$group = $this->get_mock_group('informatica');

		$this->assertSame(array(), $group->getArrayCopy());
	}

	/**
	 * When get() is called it should fetch the config value specified
	 *
	 * @test
	 * @covers Kohana_Config_Group::get
	 */
	public function test_get_fetches_config_value()
	{
		$group = $this->get_mock_group('kohana', array('status' => 'awesome'));

		$this->assertSame('awesome', $group->get('status'));
	}

	/**
	 * If a config option does not exist then get() should return the default value, which is
	 * NULL by default
	 *
	 * @test
	 * @covers Kohana_Config_Group::get
	 */
	public function test_get_returns_default_value_if_config_option_dnx()
	{
		$group = $this->get_mock_group('kohana');

		$this->assertSame(NULL,   $group->get('problems', NULL));
		$this->assertSame('nada', $group->get('problems', 'nada'));
	}

	/**
	 * We should be able to modify existing configuration items using set()
	 *
	 * @test
	 * @covers Kohana_Config_Group::set
	 */
	public function test_set_modifies_existing_config()
	{
		$group = $this->get_mock_group('kohana', array('status' => 'pre-awesome'));

		$group->set('status', 'awesome');

		$this->assertSame('awesome', $group->get('status'));
	}

	/**
	 * If we modify the config via set() [$var] or ->$var then the change should be passed to
	 * the parent config instance so that the config writers can be notified.
	 * 
	 * The modification to the config should also stick
	 *
	 * @test
	 * @covers Kohana_Config_Group::offsetSet
	 */
	public function test_writes_changes_to_config()
	{
		$mock  = $this->getMock('Kohana_Config', array('_write_config'));

		$mock
			->expects($this->exactly(3))
			->method('_write_config')
			->with('kohana', 'status', $this->LogicalOr('totally', 'maybe', 'not'));

		$group = $this->get_mock_group('kohana', array('status' => 'kool'), $mock);

		$group['status'] = 'totally';

		$group->status = 'maybe';

		$group->set('status', 'not');
	}

	/**
	 * Calling as_array() should return the full array, inc. any modifications
	 *
	 * @test
	 * @covers Kohana_Config_Group::as_array
	 */
	public function test_as_array_returns_full_array()
	{
		$config = $this->get_mock_group('something', array('var' => 'value'));

		$this->assertSame(array('var' => 'value'), $config->as_array());

		// Now change some vars **ahem**
		$config->var    = 'LOLCAT';
		$config->lolcat = 'IN UR CODE';

		$this->assertSame(
			array('var' => 'LOLCAT', 'lolcat' => 'IN UR CODE'),
			$config->as_array()
		);

		// And if we remove an item it should be removed from the exported array
		unset($config['lolcat']);
		$this->assertSame(array('var' => 'LOLCAT'), $config->as_array());
	}

	/**
	 * Casting the object to a string should serialize the output of as_array
	 *
	 * @test
	 * @covers Kohana_Config_Group::__toString
	 */
	public function test_to_string_serializes_array_output()
	{
		$vars   = array('kohana' => 'cool', 'unit_tests' => 'boring');
		$config = $this->get_mock_group('hehehe', $vars);

		$this->assertSame(serialize($vars), (string) $config);
	}
}