HWLDFWordAccumulatorTest.php

<?php

declare (strict_types=1);
namespace Drupal\Tests\Component\Diff\Engine;

// cspell:ignore HWLDFWordAccumulator
use Drupal\Component\Diff\Engine\HWLDFWordAccumulator;
use PHPUnit\Framework\TestCase;
// cspell:ignore wordword

/**
 * Test HWLDFWordAccumulator.
 *
 * @coversDefaultClass \Drupal\Component\Diff\Engine\HWLDFWordAccumulator
 *
 * @group Diff
 */
class HWLDFWordAccumulatorTest extends TestCase {
  
  /**
   * Verify that we only get back a NBSP from an empty accumulator.
   *
   * @covers ::getLines
   *
   * @see Drupal\Component\Diff\Engine\HWLDFWordAccumulator::NBSP
   */
  public function testGetLinesEmpty() : void {
    $acc = new HWLDFWordAccumulator();
    $this->assertEquals([
      '&#160;',
    ], $acc->getLines());
  }
  
  /**
   * @return array
   *   - Expected array of lines from getLines().
   *   - Array of strings for the $words parameter to addWords().
   *   - String tag for the $tag parameter to addWords().
   */
  public static function provideAddWords() {
    return [
      [
        [
          'wordword2',
        ],
        [
          'word',
          'word2',
        ],
        'tag',
      ],
      [
        [
          'word',
          'word2',
        ],
        [
          'word',
          "\nword2",
        ],
        'tag',
      ],
      [
        [
          '&#160;',
          'word2',
        ],
        [
          '',
          "\nword2",
        ],
        'tag',
      ],
    ];
  }
  
  /**
   * @covers ::addWords
   * @dataProvider provideAddWords
   */
  public function testAddWords($expected, $words, $tag) : void {
    $acc = new HWLDFWordAccumulator();
    $acc->addWords($words, $tag);
    $this->assertEquals($expected, $acc->getLines());
  }

}