Make StandaloneExtensionManagers configurable

src/Reader/StandaloneExtensionManager.php

@@ -9,7 +9,7 @@
 
 namespace Zend\Feed\Reader;
 
-class StandaloneExtensionManager implements ExtensionManagerInterface
+final class StandaloneExtensionManager implements ExtensionManagerInterface
 {
     private $extensions = [
         'Atom\Entry'            => 'Zend\Feed\Reader\Extension\Atom\Entry',
@@ -49,4 +49,30 @@ public function get($extension)
         $class = $this->extensions[$extension];
         return new $class();
     }
+
+    /**
+     * Add an extension.
+     *
+     * @param string $name
+     * @param string $class
+     */
+    public function add($name, $class)
+    {
+        $this->extensions[$name] = $class;
+    }
+
+    /**
+     * Remove an extension.
+     *
+     * @param string $name
+     * @return bool
+     */
+    public function remove($name)
+    {
+        if (array_key_exists($name, $this->extensions)) {
+            unset($this->extensions[$name]);
+            return true;
+        }
+        return false;
+    }
 }

test/Reader/StandaloneExtensionManagerTest.php

@@ -80,4 +80,18 @@ public function testEachPluginRetrievalReturnsNewInstance($pluginName, $pluginCl
         $this->assertInstanceOf($pluginClass, $test);
         $this->assertNotSame($extension, $test);
     }
+
+    public function testAddingPlugin()
+    {
+        $this->extensions->add('Test/Test', 'mytestextension');
+        $this->assertTrue($this->extensions->has('Test/Test'));
+    }
+
+    public function testRemovingPlugin()
+    {
+        $this->extensions->add('Test/Test', 'mytestextension');
+        $this->assertTrue($this->extensions->remove('Test/Test'));
+        $this->assertFalse($this->extensions->has('Test/Test'));
+        $this->assertFalse($this->extensions->remove('Test/Test'));
+    }
 }