Merge branch 'merge-containers'

src/Container.php

@@ -1,5 +1,4 @@
 <?php
-
 namespace SD\DependencyInjection;
 
 class Container {
@@ -61,6 +60,19 @@ public function inject($consumer) {
         return $this->injectRecursive($consumer);
     }
 
+    public static function merge(self ...$containers): self {
+        $merged = new self();
+        foreach ($containers as $container) {
+            foreach ($container->initializers as $name => $initializer) {
+                $merged->initializers[$name] = $initializer;
+            }
+            foreach ($container->services as $name => $service) {
+                $merged->services[$name] = $service;
+            }
+        }
+        return $merged;
+    }
+
     // Public for compatibility mode only.
     public function get($name) {
         $this->usedNames = [];

tests/ContainerTest.php

@@ -82,4 +82,19 @@ public function testConnect() {
         $this->assertEquals($name, $service->getName(), 'Must inject name from config');
         $this->assertEquals($container, $service->getContainer(), 'Must inject container by setter');
     }
+
+    public function testMerge() {
+        $post = new \stdClass();
+        $request = new \stdClass();
+        $postContainer = new Container([
+            'post' => $post,
+        ]);
+        $requestContainer = new Container([
+            'request' => $request,
+        ]);
+        $mergedContainer = Container::merge($postContainer, $requestContainer);
+        $consumer = $mergedContainer->inject(new MultiConsumer());
+        $this->assertSame($post, $consumer->getPost(), 'Must inject post from post container');
+        $this->assertSame($request, $consumer->getRequest(), 'Must inject request from request container');
+    }
 }

tests/MultiConsumer.php

@@ -0,0 +1,29 @@
+<?php
+namespace tests;
+
+use SD\DependencyInjection\DeclarerInterface;
+
+class MultiConsumer implements DeclarerInterface {
+    private $post;
+    private $request;
+
+    public function declareDependencies() {
+        return ['post', 'request'];
+    }
+
+    public function setPost($post) {
+        $this->post = $post;
+    }
+
+    public function getPost() {
+        return $this->post;
+    }
+
+    public function setRequest($request) {
+        $this->request = $request;
+    }
+
+    public function getRequest() {
+        return $this->request;
+    }
+}