[Nostromo] If user is not defined, get current running user

src/Mage/Tests/Runtime/RuntimeTest.php

@@ -154,4 +154,14 @@ class RuntimeTest extends TestCase
         $process = $runtime->runLocalCommand('false');
         $this->assertFalse($process->isSuccessful());
     }
+
+    public function testCurrentUser()
+    {
+        $runtime = new Runtime();
+        $userData = posix_getpwuid(posix_geteuid());
+
+        $this->assertTrue(is_array($userData));
+        $this->assertArrayHasKey('name', $userData);
+        $this->assertEquals($userData['name'], $runtime->getCurrentUser());
+    }
 }