/**
  * @covers ::submitSelectorForm
  */
 public function testSubmitSelectorForm()
 {
     $form = array('container' => array('plugin_form' => array($this->randomMachineName() => [])));
     $form_state = $this->getMock(FormStateInterface::class);
     $plugin = $this->getMockForAbstractClass(AdvancedPluginSelectorBaseUnitTestPluginFormPluginInterface::class);
     $plugin->expects($this->once())->method('submitConfigurationForm')->with($form['container']['plugin_form'], $form_state);
     $this->sut->submitSelectorForm($form, $form_state);
     $this->sut->setSelectedPlugin($plugin);
     $this->sut->submitSelectorForm($form, $form_state);
 }