My first commit of codes

vendor/psy/psysh/test/Psy/Test/CodeCleaner/AssignThisVariablePassTest.php

@@ -0,0 +1,62 @@
+<?php
+
+/*
+ * This file is part of Psy Shell
+ *
+ * (c) 2012-2014 Justin Hileman
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Psy\Test\CodeCleaner;
+
+use PHPParser_NodeTraverser as NodeTraverser;
+use Psy\CodeCleaner\AssignThisVariablePass;
+
+class AssignThisVariablePassTest extends CodeCleanerTestCase
+{
+    public function setUp()
+    {
+        $this->pass      = new AssignThisVariablePass();
+        $this->traverser = new NodeTraverser();
+        $this->traverser->addVisitor($this->pass);
+    }
+
+    /**
+     * @dataProvider invalidStatements
+     * @expectedException \Psy\Exception\FatalErrorException
+     */
+    public function testProcessStatementFails($code)
+    {
+        $stmts = $this->parse($code);
+        $this->traverser->traverse($stmts);
+    }
+
+    public function invalidStatements()
+    {
+        return array(
+            array('$this = 3'),
+            array('strtolower($this = "this")'),
+        );
+    }
+
+    /**
+     * @dataProvider validStatements
+     */
+    public function testProcessStatementPasses($code)
+    {
+        $stmts = $this->parse($code);
+        $this->traverser->traverse($stmts);
+    }
+
+    public function validStatements()
+    {
+        return array(
+            array('$this'),
+            array('$a = $this'),
+            array('$a = "this"; $$a = 3'),
+            array('$$this = "b"'),
+        );
+    }
+}