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<?php
/**
 * PHPUnit_SkeletonGenerator
 *
 * Copyright (c) 2012, Sebastian Bergmann <sebastian@phpunit.de>.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 *   * Redistributions of source code must retain the above copyright
 *     notice, this list of conditions and the following disclaimer.
 *
 *   * Redistributions in binary form must reproduce the above copyright
 *     notice, this list of conditions and the following disclaimer in
 *     the documentation and/or other materials provided with the
 *     distribution.
 *
 *   * Neither the name of Sebastian Bergmann nor the names of his
 *     contributors may be used to endorse or promote products derived
 *     from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
 * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
 * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 *
 * @package    PHPUnit
 * @subpackage SkeletonGenerator
 * @author     Sebastian Bergmann <sebastian@phpunit.de>
 * @copyright  2012 Sebastian Bergmann <sebastian@phpunit.de>
 * @license    http://www.opensource.org/licenses/BSD-3-Clause  The BSD 3-Clause License
 * @link       http://www.phpunit.de/
 * @since      File available since Release 1.0.0
 */

namespace SebastianBergmann\PHPUnit\SkeletonGenerator
{
    /**
     * Generator for test class skeletons from classes.
     *
     * @package    PHPUnit
     * @subpackage SkeletonGenerator
     * @author     Sebastian Bergmann <sebastian@phpunit.de>
     * @copyright  2012 Sebastian Bergmann <sebastian@phpunit.de>
     * @license    http://www.opensource.org/licenses/BSD-3-Clause  The BSD 3-Clause License
     * @link       http://www.phpunit.de/
     * @since      Class available since Release 1.0.0
     */
    class TestGenerator extends AbstractGenerator
    {
        /**
         * @var array
         */
        protected $methodNameCounter = array();

        /**
         * Constructor.
         *
         * @param string $inClassName
         * @param string $inSourceFile
         * @param string $outClassName
         * @param string $outSourceFile
         * @throws \RuntimeException
         */
        public function __construct($inClassName, $inSourceFile = '', $outClassName = '', $outSourceFile = '')
        {
            if (class_exists($inClassName)) {
                $reflector    = new \ReflectionClass($inClassName);
                $inSourceFile = $reflector->getFileName();

                if ($inSourceFile === FALSE) {
                    $inSourceFile = '<internal>';
                }

                unset($reflector);
            } else {
                if (empty($inSourceFile)) {
                    $possibleFilenames = array(
                      $inClassName . '.php',
                      str_replace(
                        array('_', '\\'),
                        DIRECTORY_SEPARATOR,
                        $inClassName
                      ) . '.php'
                    );

                    foreach ($possibleFilenames as $possibleFilename) {
                        if (is_file($possibleFilename)) {
                            $inSourceFile = $possibleFilename;
                        }
                    }
                }

                if (empty($inSourceFile)) {
                    throw new \RuntimeException(
                      sprintf(
                        'Neither "%s" nor "%s" could be opened.',
                        $possibleFilenames[0],
                        $possibleFilenames[1]
                      )
                    );
                }

                if (!is_file($inSourceFile)) {
                    throw new \RuntimeException(
                      sprintf(
                        '"%s" could not be opened.',

                        $inSourceFile
                      )
                    );
                }

                $inSourceFile = realpath($inSourceFile);
                include_once $inSourceFile;

                if (!class_exists($inClassName)) {
                    throw new \RuntimeException(
                      sprintf(
                        'Could not find class "%s" in "%s".',

                        $inClassName,
                        $inSourceFile
                      )
                    );
                }
            }

            if (empty($outClassName)) {
                $outClassName = $inClassName . 'Test';
            }

            if (empty($outSourceFile)) {
                $outSourceFile = dirname($inSourceFile) . DIRECTORY_SEPARATOR . $outClassName . '.php';
            }

            parent::__construct(
              $inClassName, $inSourceFile, $outClassName, $outSourceFile
            );
        }

        /**
         * Generates the test class' source.
         *
         * @param  boolean $verbose
         * @return mixed
         */
        public function generate($verbose = FALSE)
        {
            $class             = new \ReflectionClass(
                                   $this->inClassName['fullyQualifiedClassName']
                                 );
            $methods           = '';
            $incompleteMethods = '';

            foreach ($class->getMethods() as $method) {
                if (!$method->isConstructor() &&
                    !$method->isAbstract() &&
                     $method->isPublic() &&
                     $method->getDeclaringClass()->getName() == $this->inClassName['fullyQualifiedClassName']) {
                    $assertAnnotationFound = FALSE;

                    if (preg_match_all('/@assert(.*)$/Um', $method->getDocComment(), $annotations)) {
                        foreach ($annotations[1] as $annotation) {
                            if (preg_match('/\((.*)\)\s+([^\s]*)\s+(.*)/', $annotation, $matches)) {
                                switch ($matches[2]) {
                                    case '==': {
                                        $assertion = 'Equals';
                                    }
                                    break;

                                    case '!=': {
                                        $assertion = 'NotEquals';
                                    }
                                    break;

                                    case '===': {
                                        $assertion = 'Same';
                                    }
                                    break;

                                    case '!==': {
                                        $assertion = 'NotSame';
                                    }
                                    break;

                                    case '>': {
                                        $assertion = 'GreaterThan';
                                    }
                                    break;

                                    case '>=': {
                                        $assertion = 'GreaterThanOrEqual';
                                    }
                                    break;

                                    case '<': {
                                        $assertion = 'LessThan';
                                    }
                                    break;

                                    case '<=': {
                                        $assertion = 'LessThanOrEqual';
                                    }
                                    break;

                                    case 'throws': {
                                        $assertion = 'exception';
                                    }
                                    break;

                                    default: {
                                        throw new \RuntimeException(
                                          sprintf(
                                            'Token "%s" could not be parsed in @assert annotation.',
                                            $matches[2]
                                          )
                                        );
                                    }
                                }

                                if ($assertion == 'exception') {
                                    $template = 'TestMethodException';
                                }

                                else if ($assertion == 'Equals' &&
                                         strtolower($matches[3]) == 'true') {
                                    $assertion = 'True';
                                    $template  = 'TestMethodBool';
                                }

                                else if ($assertion == 'NotEquals' &&
                                         strtolower($matches[3]) == 'true') {
                                    $assertion = 'False';
                                    $template  = 'TestMethodBool';
                                }

                                else if ($assertion == 'Equals' &&
                                         strtolower($matches[3]) == 'false') {
                                    $assertion = 'False';
                                    $template  = 'TestMethodBool';
                                }

                                else if ($assertion == 'NotEquals' &&
                                         strtolower($matches[3]) == 'false') {
                                    $assertion = 'True';
                                    $template  = 'TestMethodBool';
                                }

                                else {
                                    $template = 'TestMethod';
                                }

                                if ($method->isStatic()) {
                                    $template .= 'Static';
                                }

                                $methodTemplate = new \Text_Template(
                                  sprintf(
                                    '%s%stemplate%s%s.tpl',

                                    __DIR__,
                                    DIRECTORY_SEPARATOR,
                                    DIRECTORY_SEPARATOR,
                                    $template
                                  )
                                );

                                $origMethodName = $method->getName();
                                $methodName     = ucfirst($origMethodName);

                                if (isset($this->methodNameCounter[$methodName])) {
                                    $this->methodNameCounter[$methodName]++;
                                } else {
                                    $this->methodNameCounter[$methodName] = 1;
                                }

                                if ($this->methodNameCounter[$methodName] > 1) {
                                    $methodName .= $this->methodNameCounter[$methodName];
                                }

                                $methodTemplate->setVar(
                                  array(
                                    'annotation'     => trim($annotation),
                                    'arguments'      => $matches[1],
                                    'assertion'      => isset($assertion) ? $assertion : '',
                                    'expected'       => $matches[3],
                                    'origMethodName' => $origMethodName,
                                    'className'      => $this->inClassName['fullyQualifiedClassName'],
                                    'methodName'     => $methodName
                                  )
                                );

                                $methods .= $methodTemplate->render();

                                $assertAnnotationFound = TRUE;
                            }
                        }
                    }

                    if (!$assertAnnotationFound) {
                        $methodTemplate = new \Text_Template(
                          sprintf(
                            '%s%stemplate%sIncompleteTestMethod.tpl',

                            __DIR__,
                            DIRECTORY_SEPARATOR,
                            DIRECTORY_SEPARATOR
                          )
                        );

                        $methodTemplate->setVar(
                          array(
                            'className'      => $this->inClassName['fullyQualifiedClassName'],
                            'methodName'     => ucfirst($method->getName()),
                            'origMethodName' => $method->getName()
                          )
                        );

                        $incompleteMethods .= $methodTemplate->render();
                    }
                }
            }

            $classTemplate = new \Text_Template(
              sprintf(
                '%s%stemplate%sTestClass.tpl',

                __DIR__,
                DIRECTORY_SEPARATOR,
                DIRECTORY_SEPARATOR
              )
            );

            if ($this->outClassName['namespace'] != '') {
                $namespace = "\nnamespace " .
                             $this->outClassName['namespace'] . ";\n";
            } else {
                $namespace = '';
            }

            $classTemplate->setVar(
              array(
                'namespace'          => $namespace,
                'namespaceSeparator' => !empty($namespace) ? '\\' : '',
                'className'          => $this->inClassName['className'],
                'testClassName'      => $this->outClassName['className'],
                'methods'            => $methods . $incompleteMethods,
                'date'               => date('Y-m-d'),
                'time'               => date('H:i:s'),
                'version'            => Version::id()
              )
            );

            if (!$verbose) {
                return $classTemplate->render();
            } else {
                return array(
                  'code'       => $classTemplate->render(),
                  'incomplete' => empty($methods)
                );
            }
        }
    }
}

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