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diff --git a/vendor/psy/psysh/test/Psy/Test/CodeCleaner/ImplicitReturnPassTest.php b/vendor/psy/psysh/test/Psy/Test/CodeCleaner/ImplicitReturnPassTest.php
new file mode 100644
index 000000000..e6a1bdfe6
--- /dev/null
+++ b/vendor/psy/psysh/test/Psy/Test/CodeCleaner/ImplicitReturnPassTest.php
@@ -0,0 +1,96 @@
+<?php
+
+/*
+ * This file is part of Psy Shell.
+ *
+ * (c) 2012-2017 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 Psy\CodeCleaner\ImplicitReturnPass;
+
+class ImplicitReturnPassTest extends CodeCleanerTestCase
+{
+    public function setUp()
+    {
+        $this->setPass(new ImplicitReturnPass());
+    }
+
+    /**
+     * @dataProvider implicitReturns
+     */
+    public function testProcess($from, $to)
+    {
+        $this->assertProcessesAs($from, $to);
+    }
+
+    public function implicitReturns()
+    {
+        $values = array(
+            array('4',        'return 4;'),
+            array('foo()',    'return foo();'),
+            array('return 1', 'return 1;'),
+        );
+
+        $from = 'if (true) { 1; } elseif (true) { 2; } else { 3; }';
+        $to = <<<'EOS'
+if (true) {
+    return 1;
+} elseif (true) {
+    return 2;
+} else {
+    return 3;
+}
+return new \Psy\CodeCleaner\NoReturnValue();
+EOS;
+        $values[] = array($from, $to);
+
+        $from = 'class A {}';
+        $to = <<<'EOS'
+class A
+{
+}
+return new \Psy\CodeCleaner\NoReturnValue();
+EOS;
+        $values[] = array($from, $to);
+
+        $from = <<<'EOS'
+switch (false) {
+    case 0:
+        0;
+    case 1:
+        1;
+        break;
+    case 2:
+        2;
+        return;
+}
+EOS;
+        $to = <<<'EOS'
+switch (false) {
+    case 0:
+        0;
+    case 1:
+        return 1;
+        break;
+    case 2:
+        2;
+        return;
+}
+return new \Psy\CodeCleaner\NoReturnValue();
+EOS;
+        $values[] = array($from, $to);
+
+        if (version_compare(PHP_VERSION, '5.4', '<')) {
+            $values[] = array('exit()', 'die;');
+        } else {
+            $values[] = array('exit()', 'exit;');
+        }
+
+        return $values;
+    }
+}