Fix with whitelisted files for Configurable Scoper

src/Scoper/ConfigurableScoper.php

@@ -30,7 +30,15 @@ public function withWhitelistedFiles(string ...$whitelistedFiles): self
     {
         $self = clone $this;
 
-        return [] === $whitelistedFiles ? $self : new self(new FileWhitelistScoper($self));
+        return [] === $whitelistedFiles
+            ? $self
+            : new self(
+                new FileWhitelistScoper(
+                    $self,
+                    ...$whitelistedFiles
+                )
+            )
+        ;
     }
 
     /**

tests/Scoper/ConfigurableScoperTest.php

@@ -0,0 +1,106 @@
+<?php
+
+declare(strict_types=1);
+
+/*
+ * This file is part of the humbug/php-scoper package.
+ *
+ * Copyright (c) 2017 Théo FIDRY <[email protected]>,
+ *                    Pádraic Brady <[email protected]>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Humbug\PhpScoper\Scoper;
+
+use Humbug\PhpScoper\Scoper;
+use Humbug\PhpScoper\Whitelist;
+use PHPUnit\Framework\TestCase;
+use Prophecy\Argument;
+use Prophecy\Prophecy\ObjectProphecy;
+
+/**
+ * @covers \Humbug\PhpScoper\Scoper\ConfigurableScoper
+ */
+class ConfigurableScoperTest extends TestCase
+{
+    /**
+     * @var Scoper|ObjectProphecy
+     */
+    private $decoratedScoperProphecy;
+
+    /**
+     * @var Scoper
+     */
+    private $decoratedScoper;
+
+    /**
+     * @inheritdoc
+     */
+    public function setUp()
+    {
+        $this->decoratedScoperProphecy = $this->prophesize(Scoper::class);
+        $this->decoratedScoper = $this->decoratedScoperProphecy->reveal();
+    }
+
+    public function test_is_a_Scoper()
+    {
+        $this->assertTrue(is_a(ConfigurableScoper::class, Scoper::class, true));
+    }
+
+    public function test_it_scopes_the_files_with_the_decorated_scoper()
+    {
+        $filePath = '/path/to/file.php';
+        $contents = 'Original file content';
+        $prefix = 'Humbug';
+        $patchers = [];
+        $whitelist = Whitelist::create(true, true, true, 'Foo');
+
+        $this->decoratedScoperProphecy
+            ->scope($filePath, $contents, $prefix, $patchers, $whitelist)
+            ->willReturn($expected = 'Decorated scoper contents')
+        ;
+
+        $scoper = new ConfigurableScoper($this->decoratedScoper);
+
+        $actual = $scoper->scope($filePath, $contents, $prefix, $patchers, $whitelist);
+
+        $this->assertSame($expected, $actual);
+
+        $this->decoratedScoperProphecy->scope(Argument::cetera())->shouldHaveBeenCalledTimes(1);
+    }
+
+    public function test_it_can_create_a_scoper_allowing_to_whitelist_specific_files()
+    {
+        $whitelistedFiles = [
+            '/path/to/whitelisted-file-1',
+            '/path/to/whitelisted-file-2',
+        ];
+
+        $filePath = '/path/to/file.php';
+        $contents = 'Original file content';
+        $prefix = 'Humbug';
+        $patchers = [];
+        $whitelist = Whitelist::create(true, true, true, 'Foo');
+
+        $this->decoratedScoperProphecy
+            ->scope(Argument::any(), $contents, $prefix, $patchers, $whitelist)
+            ->willReturn($expected = 'scoped contents')
+        ;
+
+        $scoper = (new ConfigurableScoper($this->decoratedScoper))->withWhitelistedFiles(...$whitelistedFiles);
+
+        foreach ($whitelistedFiles as $whitelistedFile) {
+            $actual = $scoper->scope($whitelistedFile, $contents, $prefix, $patchers, $whitelist);
+
+            $this->assertSame($contents, $actual);
+        }
+
+        $actual = $scoper->scope($filePath, $contents, $prefix, $patchers, $whitelist);
+
+        $this->assertSame($expected, $actual);
+
+        $this->decoratedScoperProphecy->scope(Argument::cetera())->shouldHaveBeenCalledTimes(1);
+    }
+}