Issue #3489915 by phenaproxima: RecipeInputFormTrait forces you to check all checkboxes

          $element += [

            '#description' => $definition->getDescription(),

            '#default_value' => $default_value,

            '#type' => 'value',

          ];

          // Recipe inputs are always required.

          $element['#required'] = TRUE;

          // Recipe inputs are required by default, unless they are single

          // checkboxes, in which case the `#required` behavior doesn't make

          // a lot of sense because it forces the user to check the box.

          $element['#required'] ??= ($element['#type'] !== 'checkbox');

          NestedArray::setValue($this->form, explode('.', $name, 2), $element);

          // Always return the input elements as a tree.

    $this->drupalGet('/form-test/recipe-input');

    $assert_session = $this->assertSession();

    // There should only be one nested input element on the page: the one

    // There should only be two nested input elements on the page: the two

    // defined by the input_test recipe.

    $assert_session->elementsCount('css', 'input[name*="["]', 1);

    $assert_session->elementsCount('css', 'input[name*="["]', 2);

    // The default value and description should be visible.

    $assert_session->fieldValueEquals('input_test[owner]', 'Dries Buytaert');

    $assert_session->pageTextContains('The name of the site owner.');

    // All recipe inputs are required.

    $this->assertSame('checkbox', $assert_session->fieldExists('Allow mischief')->getAttribute('type'));

    // All recipe inputs are required, except for checkboxes, for which that

    // behavior makes no sense.

    $this->submitForm(['input_test[owner]' => ''], 'Apply recipe');

    $assert_session->statusMessageContains("Site owner's name field is required.", 'error');

    $assert_session->statusMessageNotContains('Allow mischief field is required.', 'error');

    // All inputs should be validated with their own constraints.

    $this->submitForm(['input_test[owner]' => 'Hacker Joe'], 'Apply recipe');

    $assert_session->statusMessageContains("I don't think you should be owning sites.", 'error');

    default:

      source: value

      value: 'Dries Buytaert'

  break_stuff:

    data_type: boolean

    description: 'Should mischief be allowed on this site? Not recommended.'

    form:

      '#type': checkbox

      '#title': 'Allow mischief'

    default:

      source: value

      value: false

config:

  actions:

    system.site: