<?php
/**
 * TestLoader for CakePHP Test suite.
 *
 * Turns partial paths used on the testsuite console and web UI into full file paths.
 *
 * CakePHP(tm) : Rapid Development Framework (http://cakephp.org)
 * Copyright (c) Cake Software Foundation, Inc. (http://cakefoundation.org)
 *
 * Licensed under The MIT License
 * For full copyright and license information, please see the LICENSE.txt
 * Redistributions of files must retain the above copyright notice.
 *
 * @copyright     Copyright (c) Cake Software Foundation, Inc. (http://cakefoundation.org)
 * @link          http://cakephp.org CakePHP(tm) Project
 * @since         CakePHP(tm) v 2.0
 * @license       http://www.opensource.org/licenses/mit-license.php MIT License
 * @package Cake.TestSuite
 */

/**
 * TestLoader for CakePHP Test suite.
 *
 * Turns partial paths used on the testsuite console and web UI into full file paths.
 *
 * @package Cake.TestSuite
 */
class CakeTestLoader extends PHPUnit_Runner_StandardTestSuiteLoader {

/**
 * Load a file and find the first test case / suite in that file.
 *
 * @param string $filePath The file path to load
 * @param string $params Additional parameters
 * @return ReflectionClass
 */
	public function load($filePath, $params = '') {
		$file = $this->_resolveTestFile($filePath, $params);
		return parent::load('', $file);
	}

/**
 * Convert path fragments used by CakePHP's test runner to absolute paths that can be fed to PHPUnit.
 *
 * @param string $filePath The file path to load
 * @param string $params Additional parameters
 * @return void
 */
	protected function _resolveTestFile($filePath, $params) {
		$basePath = $this->_basePath($params) . DS . $filePath;
		$ending = 'Test.php';
		return (strpos($basePath, $ending) === (strlen($basePath) - strlen($ending))) ? $basePath : $basePath . $ending;
	}

/**
 * Generates the base path to a set of tests based on the parameters.
 *
 * @param array $params The path parameters.
 * @return string The base path.
 */
	protected static function _basePath($params) {
		$result = null;
		if (!empty($params['core'])) {
			$result = CORE_TEST_CASES;
		} elseif (!empty($params['plugin'])) {
			if (!CakePlugin::loaded($params['plugin'])) {
				try {
					CakePlugin::load($params['plugin']);
					$result = CakePlugin::path($params['plugin']) . 'Test' . DS . 'Case';
				} catch (MissingPluginException $e) {
				}
			} else {
				$result = CakePlugin::path($params['plugin']) . 'Test' . DS . 'Case';
			}
		} elseif (!empty($params['app'])) {
			$result = APP_TEST_CASES;
		}
		return $result;
	}

/**
 * Get the list of files for the test listing.
 *
 * @param string $params Path parameters
 * @return array
 */
	public static function generateTestList($params) {
		$directory = self::_basePath($params);
		$fileList = self::_getRecursiveFileList($directory);

		$testCases = array();
		foreach ($fileList as $testCaseFile) {
			$case = str_replace($directory . DS, '', $testCaseFile);
			$case = str_replace('Test.php', '', $case);
			$testCases[$testCaseFile] = $case;
		}
		sort($testCases);
		return $testCases;
	}

/**
 * Gets a recursive list of files from a given directory and matches then against
 * a given fileTestFunction, like isTestCaseFile()
 *
 * @param string $directory The directory to scan for files.
 * @return array
 */
	protected static function _getRecursiveFileList($directory = '.') {
		$fileList = array();
		if (!is_dir($directory)) {
			return $fileList;
		}

		$files = new RegexIterator(
			new RecursiveIteratorIterator(new RecursiveDirectoryIterator($directory)),
			'/.*Test.php$/'
		);

		foreach ($files as $file) {
			$fileList[] = $file->getPathname();
		}
		return $fileList;
	}

}
