checkIncludeDefaultContent example

protected static $modules = ['sdc', 'sdc_test'];

  /** * {@inheritdoc} */
  protected static $themes = ['sdc_theme_test'];

  /** * Test that components render correctly. */
  public function testRender(): void {
    $this->checkIncludeDefaultContent();
    $this->checkIncludeDataMapping();
    $this->checkEmbedWithNested();
    $this->checkPropValidation();
    $this->checkArrayObjectTypeCast();
    $this->checkNonExistingComponent();
    $this->checkLibraryOverrides();
    $this->checkAttributeMerging();
    $this->checkRenderElementAlters();
    $this->checkInvalidSlot();
  }