Generic Codeception Cest for testing content types and fields with Drupal Content Type Registry

ContentTypes.php

<?php
use \AcceptanceTester\AuthenticatedSteps;
use \Codeception\Module\Drupal\ContentTypeRegistry\ContentType;
use \Codeception\Module\Drupal\Pages\AdminContentTypesPage;
use \Codeception\Module\Drupal\Pages\AdminManageFieldsPage;

/**
 * Test defined content types and fields.
 *
 * @guy AcceptanceTester\AuthenticatedSteps
 */
class ContentTypesCest
{
    /**
     * Test the page at admin/structure/types.
     *
     * @param AuthenticatedSteps $I
     */
    public function testContentTypeAdminPage(AuthenticatedSteps $I)
    {
        $I->wantTo('ensure that all content types are present on the content types page');
        $I->amGoingTo('log in and head to the content types admin page');
        $I->login($I->getUserByRole('administrator'));
        $I->amOnPage(AdminContentTypesPage::route());

        foreach ($I->getContentTypes() as $contentType) {
            $I->expectTo('see that the ' . $contentType->getMachineName() . ' type is on the content types page');
            $I->see(sprintf('Machine name: %s', $contentType->getMachineName()), '//table//td');
            $I->see($contentType->getHumanName(), '//table//td');
        }

        $I->logout();
    }

    /**
     * Test for all content type fields on the administration pages.
     *
     * @param AuthenticatedSteps $I
     */
    public function testFields(AuthenticatedSteps $I)
    {
        $I->wantTo('ensure that all fields are present on all content types on the admin side');
        $I->amGoingTo('log in and head to the content types admin page');
        $I->login($I->getUserByRole('administrator'));
        $I->amOnPage(AdminContentTypesPage::route());

        foreach ($I->getContentTypes() as $contentType) {
            $I->amGoingTo('check the fields on the ' . $contentType->getHumanName() . ' content type');
            $this->testFieldsOnType($I, $contentType);
        }

        $I->logout();
    }

    /**
     * Test the fields on a specific content type's "manage fields" admin page.
     *
     * @param AuthenticatedSteps $I
     * @param ContentType $contentType
     *   The ContentType object that should be tested.
     */
    protected function testFieldsOnType(AuthenticatedSteps $I, ContentType $contentType)
    {
        $I->amOnPage(AdminManageFieldsPage::route($contentType->getMachineName()));

        foreach ($contentType->getFields() as $field) {
            $I->expectTo('see all details in the correct place for the ' . $field->getLabel() . ' field');
            $I->see($field->getMachine(), AdminManageFieldsPage::getMachineNameSelector($field->getMachine()));
            $I->see($field->getLabel(), AdminManageFieldsPage::getHumanNameSelector($field->getMachine()));
            $I->see($field->getType(), AdminManageFieldsPage::getFieldTypeSelector($field->getMachine()));

            // Some fields have a blank column for "widget". The field objects know if they should have something in
            // this column or not, so we only check that column if there's supposed to be something there.
            if ($field->hasWidget()) {
                $I->see($field->getWidget()->getName(), AdminManageFieldsPage::getWidgetSelector($field->getMachine()));
            }
        }
    }
}