Issue #2750925 by quietone, vakulrai, pavnish, Neslee Canil Pinto,...

    }

    else {

      // Textfield handling.

      $value = substr($random->sentences(mt_rand(1, $settings['max_length'] / 3), FALSE), 0, $settings['max_length']);

      $max = ceil($settings['max_length'] / 3);

      $value = substr($random->sentences(mt_rand(1, $max), FALSE), 0, $settings['max_length']);

    }

    $values = [

<?php

namespace Drupal\Tests\text\Kernel;

use Drupal\Core\Field\BaseFieldDefinition;

use Drupal\KernelTests\KernelTestBase;

use Drupal\text\Plugin\Field\FieldType\TextItemBase;

/**

 * Tests TextItemBase.

 *

 * @group text

 */

class TextItemBaseTest extends KernelTestBase {

  /**

   * {@inheritdoc}

   */

  protected static $modules = ['filter', 'text'];

  /**

   * Tests creation of sample values.

   *

   * @covers ::generateSampleValue

   * @dataProvider providerTextFieldSampleValue

   */

  public function testTextFieldSampleValue($max_length) {

    // Create a text field.

    $field_definition = BaseFieldDefinition::create('text')

      ->setTargetEntityTypeId('foo');

    // Ensure testing of max_lengths from 1 to 3 because generateSampleValue

    // creates a sentence with a maximum number of words set to 1/3 of the

    // max_length of the field.

    $field_definition->setSetting('max_length', $max_length);

    $sample_value = TextItemBase::generateSampleValue($field_definition);

    $this->assertEquals($max_length, strlen($sample_value['value']));

  }

  /**

   * Data provider for testTextFieldSampleValue.

   */

  public function providerTextFieldSampleValue() {

    return [

      [

        1,

      ],

      [

        2,

      ],

      [

        3,

      ],

      [

        4,

      ],

    ];

  }

}