Development

- Added dependency injection support.
- Added php-di composer dependency.
- Added `ClassLoader` class.
- Added `IClassLoader` interface.
- Added unit-tests for dependency injection.
- Updated documentation to reflect new features.

tests/Pecee/SimpleRouter/DependencyInjectionTest.php

@@ -0,0 +1,53 @@
+<?php
+
+require_once 'Dummy/DummyMiddleware.php';
+
+class DependencyInjectionTest extends \PHPUnit\Framework\TestCase
+{
+    public function testDependencyInjectionDevelopment()
+    {
+        $builder = new \DI\ContainerBuilder();
+        $container = $builder
+            ->useAutowiring(true)
+            ->ignorePhpDocErrors(true)
+            ->build();
+
+        TestRouter::enableDependencyInjection($container);
+
+        $className = null;
+
+        TestRouter::get('/', function (DummyMiddleware $url) use (&$className) {
+            $className = \get_class($url);
+        });
+
+        TestRouter::debug('/');
+
+        $this->assertEquals(DummyMiddleware::class, $className);
+    }
+
+    public function testDependencyInjectionProduction()
+    {
+        $cacheDir = dirname(__DIR__, 2) . '/tmp';
+
+        $builder = new \DI\ContainerBuilder();
+        $builder
+            ->enableCompilation($cacheDir)
+            ->writeProxiesToFile(true, $cacheDir . '/proxies')
+            ->ignorePhpDocErrors(true)
+            ->useAutowiring(true);
+
+        $container = $builder->build();
+
+        TestRouter::enableDependencyInjection($container);
+
+        $className = null;
+
+        TestRouter::get('/', function (DummyMiddleware $url) use (&$className) {
+            $className = \get_class($url);
+        });
+
+        TestRouter::debug('/');
+
+        $this->assertEquals(DummyMiddleware::class, $className);
+    }
+}