Add Composer autoloading functions and PHPStan for testing

vendor/nikic/php-parser/test/PhpParser/CodeTestAbstract.php

@@ -0,0 +1,26 @@
+<?php declare(strict_types=1);
+
+namespace PhpParser;
+
+abstract class CodeTestAbstract extends \PHPUnit\Framework\TestCase
+{
+    protected function getTests($directory, $fileExtension, $chunksPerTest = 2) {
+        $parser = new CodeTestParser;
+        $allTests = [];
+        foreach (filesInDir($directory, $fileExtension) as $fileName => $fileContents) {
+            list($name, $tests) = $parser->parseTest($fileContents, $chunksPerTest);
+
+            // first part is the name
+            $name .= ' (' . $fileName . ')';
+            $shortName = ltrim(str_replace($directory, '', $fileName), '/\\');
+
+            // multiple sections possible with always two forming a pair
+            foreach ($tests as $i => list($mode, $parts)) {
+                $dataSetName = $shortName . (count($parts) > 1 ? '#' . $i : '');
+                $allTests[$dataSetName] = array_merge([$name], $parts, [$mode]);
+            }
+        }
+
+        return $allTests;
+    }
+}