Add Composer autoloading functions and PHPStan for testing

vendor/nikic/php-parser/test/PhpParser/Builder/NamespaceTest.php

@@ -0,0 +1,46 @@
+<?php declare(strict_types=1);
+
+namespace PhpParser\Builder;
+
+use PhpParser\Comment\Doc;
+use PhpParser\Node;
+use PhpParser\Node\Stmt;
+
+class NamespaceTest extends \PHPUnit\Framework\TestCase
+{
+    protected function createNamespaceBuilder($fqn) {
+        return new Namespace_($fqn);
+    }
+
+    public function testCreation() {
+        $stmt1 = new Stmt\Class_('SomeClass');
+        $stmt2 = new Stmt\Interface_('SomeInterface');
+        $stmt3 = new Stmt\Function_('someFunction');
+        $docComment = new Doc('/** Test */');
+        $expected = new Stmt\Namespace_(
+            new Node\Name('Name\Space'),
+            [$stmt1, $stmt2, $stmt3],
+            ['comments' => [$docComment]]
+        );
+
+        $node = $this->createNamespaceBuilder('Name\Space')
+            ->addStmt($stmt1)
+            ->addStmts([$stmt2, $stmt3])
+            ->setDocComment($docComment)
+            ->getNode()
+        ;
+        $this->assertEquals($expected, $node);
+
+        $node = $this->createNamespaceBuilder(new Node\Name(['Name', 'Space']))
+            ->setDocComment($docComment)
+            ->addStmts([$stmt1, $stmt2])
+            ->addStmt($stmt3)
+            ->getNode()
+        ;
+        $this->assertEquals($expected, $node);
+
+        $node = $this->createNamespaceBuilder(null)->getNode();
+        $this->assertNull($node->name);
+        $this->assertEmpty($node->stmts);
+    }
+}