checkLibraryOverrides example

/** * 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();
  }

  /** * Check using a component with an include and default context. */
  protected function checkIncludeDefaultContent(): void {
    $build = [
      '#type' => 'inline_template',