Add unregister to IoC-Contrainer

Signed-off-by: Steven Klar <steven.klar@mayflower.de>

laravel/documentation/ioc.md

@@ -47,3 +47,12 @@ Now that we have SwiftMailer registered in the container, we can resolve it usin
 	$mailer = IoC::resolve('mailer');
 
 > **Note:** You may also [register controllers in the container](/docs/controllers#dependency-injection).
+
+<a name="unregister"></a>
+## Unregister an existing instance
+
+For test purposes sometimes you need to unregister some container.
+
+#### Unregister example mail class:
+
+    IoC::unregister('mailer');
\ No newline at end of file

laravel/ioc.php

@@ -32,6 +32,19 @@ class IoC {
 	}
 
     /**
+     * Unregister an object
+     *
+     * @param string $name
+     */
+    public static function unregister($name)
+    {
+        if (array_key_exists($name, static::$registry)) {
+            unset(static::$registry[$name]);
+            unset(static::$singletons[$name]);
+        }
+    }
+
+	/**
 	 * Determine if an object has been registered in the container.
 	 *
 	 * @param  string  $name
@@ -141,6 +154,7 @@ class IoC {
 	 * @param  string  $type
 	 * @param  array   $parameters
 	 * @return mixed
+     * @throws \Exception
 	 */
 	protected static function build($type, $parameters = array())
 	{
@@ -218,6 +232,7 @@ class IoC {
 	 *
 	 * @param ReflectionParameter
 	 * @return default value
+     * @throws \Exception
 	 */
 	protected static function resolveNonClass($parameter)
 	{

laravel/tests/cases/ioc.test.php

@@ -28,6 +28,7 @@ class TestClassTwoForIoC
 	}
 }
 
+use \Laravel\IoC as IoC;
 
 class IoCTest extends PHPUnit_Framework_TestCase {
 
@@ -150,4 +151,17 @@ class IoCTest extends PHPUnit_Framework_TestCase {
 		$this->assertEquals(42, $class_two->class_one->test_variable);
 	}
 
+    public function testCanUnregisterRegistered()
+    {
+        $testClass = 'test';
+
+        IoC::register($testClass, function() {});
+
+        $this->assertTrue(IoC::registered($testClass));
+
+        IoC::unregister($testClass);
+
+        $this->assertFalse(IoC::registered($testClass));
+    }
+
 }