Create a MultipleDirClassSet

This way we can specify just the directories we want it to scan,
as opposed to include all dirs in the root and then
excluding all dirs we don't want in the set.

src/MultipleDirClassSet.php

@@ -0,0 +1,56 @@
+<?php
+declare(strict_types=1);
+
+namespace Arkitect;
+
+use Symfony\Component\Finder\Finder;
+
+class MultipleDirClassSet implements ClassSetInterface
+{
+    /** @var string[] */
+    private $directoryList;
+
+    /** @var array */
+    private $exclude;
+
+    private function __construct(string ...$directoryList)
+    {
+        $this->directoryList = $directoryList;
+        $this->exclude = [];
+    }
+
+    public static function fromDir(string ...$directoryList): self
+    {
+        return new self(...$directoryList);
+    }
+
+    public function excludePath(string $pattern): ClassSetInterface
+    {
+        $this->exclude[] = Glob::toRegex($pattern);
+
+        return $this;
+    }
+
+    public function getDir(): string
+    {
+        return implode(', ', $this->directoryList);
+    }
+
+    public function getIterator(): \Traversable
+    {
+        $finder = (new Finder())
+            ->files()
+            ->in($this->directoryList)
+            ->name('*.php')
+            ->sortByName()
+            ->followLinks()
+            ->ignoreUnreadableDirs(true)
+            ->ignoreVCS(true);
+
+        if ($this->exclude) {
+            $finder->notPath($this->exclude);
+        }
+
+        return $finder;
+    }
+}

tests/Unit/MultipleDirClassSetTest.php

@@ -0,0 +1,128 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Arkitect\Tests\Unit;
+
+use Arkitect\MultipleDirClassSet;
+use org\bovigo\vfs\vfsStream;
+use PHPUnit\Framework\TestCase;
+use SplFileInfo;
+
+class MultipleDirClassSetTest extends TestCase
+{
+    public function test_can_exclude_files_or_directories_from_multiple_dir_class_set(): void
+    {
+        $path = $this->createMvcProjectStructure();
+
+        $set = MultipleDirClassSet::fromDir($path . '/Controller', $path . '/Model')
+            ->excludePath("Repository");
+
+        $expected = [
+            $path . '/Controller/CatalogController.php',
+            $path . '/Controller/Foo.php',
+            $path . '/Controller/ProductsController.php',
+            $path . '/Controller/UserController.php',
+            $path . '/Controller/YieldController.php',
+            $path . '/Model/Catalog.php',
+            $path . '/Model/Products.php',
+            $path . '/Model/User.php',
+        ];
+        $actual = array_values(array_map(function ($item) {
+            /** @var SplFileInfo $item */
+            return $item->getPathname();
+        }, iterator_to_array($set)));
+        self::assertEquals($expected, $actual);
+    }
+
+    public function test_can_exclude_files_or_directories(): void
+    {
+        $path = $this->createMvcProjectStructure();
+
+        $set = MultipleDirClassSet::fromDir($path)
+            ->excludePath('Model')
+            ->excludePath('ContainerAwareInterface');
+
+        $expected = [
+            'Controller/CatalogController.php',
+            'Controller/Foo.php',
+            'Controller/ProductsController.php',
+            'Controller/UserController.php',
+            'Controller/YieldController.php',
+            'Services/UserService.php',
+            'View/CatalogView.php',
+            'View/ProductView.php',
+            'View/UserView.php',
+        ];
+
+        $actual = array_values(array_map(function ($item) {
+            /** @var SplFileInfo $item */
+            return $item->getRelativePathname();
+        }, iterator_to_array($set)));
+
+        self::assertEquals($expected, $actual);
+    }
+
+    public function test_can_exclude_glob_patterns(): void
+    {
+        $path = $this->createMvcProjectStructure();
+
+        $set = MultipleDirClassSet::fromDir($path)
+            ->excludePath('*Catalog*');
+
+        $expected = [
+            'ContainerAwareInterface.php',
+            'Controller/Foo.php',
+            'Controller/ProductsController.php',
+            'Controller/UserController.php',
+            'Controller/YieldController.php',
+            'Model/Products.php',
+            'Model/Repository/ProductsRepository.php',
+            'Model/Repository/UserRepository.php',
+            'Model/User.php',
+            'Services/UserService.php',
+            'View/ProductView.php',
+            'View/UserView.php',
+        ];
+
+        $actual = array_values(array_map(function ($item) {
+            return $item->getRelativePathname();
+        }, iterator_to_array($set)));
+
+        self::assertEquals($expected, $actual);
+    }
+
+    protected function createMvcProjectStructure(): string
+    {
+        $structure = [
+            'Controller' => [
+                'CatalogController.php' => '',
+                'Foo.php' => '',
+                'ProductsController.php' => '',
+                'UserController.php' => '',
+                'YieldController.php' => '',
+            ],
+            'Model' => [
+                'Repository' => [
+                    'CatalogRepository.php' => '',
+                    'ProductsRepository.php' => '',
+                    'UserRepository.php' => '',
+                ],
+                'Catalog.php' => '',
+                'Products.php' => '',
+                'User.php' => '',
+            ],
+            'Services' => [
+                'UserService.php' => '',
+            ],
+            'View' => [
+                'CatalogView.php' => '',
+                'ProductView.php' => '',
+                'UserView.php' => '',
+            ],
+            'ContainerAwareInterface.php' => '',
+        ];
+
+        return vfsStream::setup('root', null, $structure)->url();
+    }
+}