/**
  * @testdox asConfig() replaces values that implement ConfigProvider with their config value
  */
 public function testAsConfigProvider()
 {
     $pc = new ProgrammableCallback(function () {
     });
     $pc->setVars(['x' => new DummyConfigProvider()]);
     $pc->addParameterByName('x');
     $pc->addParameterByValue(new DummyConfigProvider());
     $config = $pc->asConfig();
     $this->assertSame('foo', $config['params'][0]);
     $this->assertSame('foo', $config['params'][1]);
 }