Add aliases for v2 Implicit*Middleware classes

These were defined as invokables in v2, and had no dependency entries.
However, they were referenced in the pipeline. Having an alias for each
allows them to now resolve to the correct factories.

Author: weierophinney

src/ConfigProvider.php

@@ -32,10 +32,12 @@ public function getDependencies() : array
         // @codingStandardsIgnoreStart
         return [
             'aliases' => [
-                DEFAULT_DELEGATE     => Handler\NotFoundHandler::class,
-                DISPATCH_MIDDLEWARE  => Router\Middleware\DispatchMiddleware::class,
-                NOT_FOUND_MIDDLEWARE => Handler\NotFoundHandler::class,
-                ROUTE_MIDDLEWARE     => Router\Middleware\PathBasedRoutingMiddleware::class,
+                DEFAULT_DELEGATE            => Handler\NotFoundHandler::class,
+                DISPATCH_MIDDLEWARE         => Router\Middleware\DispatchMiddleware::class,
+                IMPLICIT_HEAD_MIDDLEWARE    => Router\Middleware\ImplicitHeadMiddleware::class,
+                IMPLICIT_OPTIONS_MIDDLEWARE => Router\Middleware\ImplicitOptionsMiddleware::class,
+                NOT_FOUND_MIDDLEWARE        => Handler\NotFoundHandler::class,
+                ROUTE_MIDDLEWARE            => Router\Middleware\PathBasedRoutingMiddleware::class,
             ],
             'factories' => [
                 Application::class                             => Container\ApplicationFactory::class,

src/constants.php

@@ -28,6 +28,26 @@
  */
 const DISPATCH_MIDDLEWARE = __NAMESPACE__ . '\Middleware\DispatchMiddleware';
 
+/**
+ * Legacy service name for the ImplicitHeadMiddleware referenced in version 2.
+ * Should resolve to the Zend\Expressive\Router\Middleware\ImplicitHeadMiddleware
+ * service.
+ *
+ * @deprecated To remove in version 4.0.0.
+ * @var string
+ */
+const IMPLICIT_HEAD_MIDDLEWARE = __NAMESPACE__ . '\Middleware\ImplicitHeadMiddleware';
+
+/**
+ * Legacy service name for the ImplicitOptionsMiddleware referenced in version 2.
+ * Should resolve to the Zend\Expressive\Router\Middleware\ImplicitOptionsMiddleware
+ * service.
+ *
+ * @deprecated To remove in version 4.0.0.
+ * @var string
+ */
+const IMPLICIT_OPTIONS_MIDDLEWARE = __NAMESPACE__ . '\Middleware\ImplicitOptionsMiddleware';
+
 /**
  * Legacy/transitional service name for the NotFoundMiddleware introduced in
  * 3.0.0alpha2. Should resolve to the Handler\NotFoundHandler class.

test/ConfigProviderTest.php

@@ -26,6 +26,8 @@
 
 use const Zend\Expressive\DEFAULT_DELEGATE;
 use const Zend\Expressive\DISPATCH_MIDDLEWARE;
+use const Zend\Expressive\IMPLICIT_HEAD_MIDDLEWARE;
+use const Zend\Expressive\IMPLICIT_OPTIONS_MIDDLEWARE;
 use const Zend\Expressive\NOT_FOUND_MIDDLEWARE;
 use const Zend\Expressive\NOT_FOUND_RESPONSE;
 use const Zend\Expressive\ROUTE_MIDDLEWARE;
@@ -49,6 +51,8 @@ public function testProviderDefinesExpectedAliases()
         $aliases = $config['aliases'];
         $this->assertArrayHasKey(DEFAULT_DELEGATE, $aliases);
         $this->assertArrayHasKey(DISPATCH_MIDDLEWARE, $aliases);
+        $this->assertArrayHasKey(IMPLICIT_HEAD_MIDDLEWARE, $aliases);
+        $this->assertArrayHasKey(IMPLICIT_OPTIONS_MIDDLEWARE, $aliases);
         $this->assertArrayHasKey(NOT_FOUND_MIDDLEWARE, $aliases);
         $this->assertArrayHasKey(ROUTE_MIDDLEWARE, $aliases);
     }