My first commit of codes

vendor/sebastian/comparator/tests/_files/Author.php

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+<?php
+/*
+ * This file is part of the Comparator package.
+ *
+ * (c) Sebastian Bergmann <sebastian@phpunit.de>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace SebastianBergmann\Comparator;
+
+/**
+ * An author.
+ *
+ * @package    Comparator
+ * @author     Bernhard Schussek <bschussek@2bepublished.at>
+ * @copyright  Sebastian Bergmann <sebastian@phpunit.de>
+ * @license    http://www.opensource.org/licenses/BSD-3-Clause  The BSD 3-Clause License
+ * @link       http://www.github.com/sebastianbergmann/comparator
+ */
+class Author
+{
+    // the order of properties is important for testing the cycle!
+    public $books = array();
+
+    private $name = '';
+
+    public function __construct($name)
+    {
+        $this->name = $name;
+    }
+}

vendor/sebastian/comparator/tests/_files/Book.php

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+<?php
+/*
+ * This file is part of the Comparator package.
+ *
+ * (c) Sebastian Bergmann <sebastian@phpunit.de>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace SebastianBergmann\Comparator;
+
+/**
+ * A book.
+ *
+ * @package    Comparator
+ * @author     Bernhard Schussek <bschussek@2bepublished.at>
+ * @copyright  Sebastian Bergmann <sebastian@phpunit.de>
+ * @license    http://www.opensource.org/licenses/BSD-3-Clause  The BSD 3-Clause License
+ * @link       http://www.github.com/sebastianbergmann/comparator
+ */
+class Book
+{
+    // the order of properties is important for testing the cycle!
+    public $author = null;
+}

vendor/sebastian/comparator/tests/_files/ClassWithToString.php

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+<?php
+/*
+ * This file is part of the Comparator package.
+ *
+ * (c) Sebastian Bergmann <sebastian@phpunit.de>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace SebastianBergmann\Comparator;
+
+class ClassWithToString
+{
+    public function __toString()
+    {
+        return 'string representation';
+    }
+}

vendor/sebastian/comparator/tests/_files/SampleClass.php

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+<?php
+/*
+ * This file is part of the Comparator package.
+ *
+ * (c) Sebastian Bergmann <sebastian@phpunit.de>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace SebastianBergmann\Comparator;
+
+/**
+ * A sample class.
+ *
+ * @package    Comparator
+ * @author     Sebastian Bergmann <sebastian@phpunit.de>
+ * @copyright  Sebastian Bergmann <sebastian@phpunit.de>
+ * @license    http://www.opensource.org/licenses/BSD-3-Clause  The BSD 3-Clause License
+ * @link       http://www.github.com/sebastianbergmann/comparator
+ */
+class SampleClass
+{
+    public $a;
+    protected $b;
+    protected $c;
+
+    public function __construct($a, $b, $c)
+    {
+        $this->a = $a;
+        $this->b = $b;
+        $this->c = $c;
+    }
+}

vendor/sebastian/comparator/tests/_files/Struct.php

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+<?php
+/*
+ * This file is part of the Comparator package.
+ *
+ * (c) Sebastian Bergmann <sebastian@phpunit.de>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace SebastianBergmann\Comparator;
+
+/**
+ * A struct.
+ *
+ * @package    Comparator
+ * @author     Sebastian Bergmann <sebastian@phpunit.de>
+ * @copyright  Sebastian Bergmann <sebastian@phpunit.de>
+ * @license    http://www.opensource.org/licenses/BSD-3-Clause  The BSD 3-Clause License
+ * @link       http://www.github.com/sebastianbergmann/comparator
+ */
+class Struct
+{
+    public $var;
+
+    public function __construct($var)
+    {
+        $this->var = $var;
+    }
+}

vendor/sebastian/comparator/tests/_files/TestClass.php

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+<?php
+/*
+ * This file is part of the Comparator package.
+ *
+ * (c) Sebastian Bergmann <sebastian@phpunit.de>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace SebastianBergmann\Comparator;
+
+class TestClass {
+}

vendor/sebastian/comparator/tests/_files/TestClassComparator.php

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+<?php
+/*
+ * This file is part of the Comparator package.
+ *
+ * (c) Sebastian Bergmann <sebastian@phpunit.de>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace SebastianBergmann\Comparator;
+
+class TestClassComparator extends ObjectComparator {
+}