aleph1.co.uk Git - yaffs-website/blob - Drupal/Tests/Component/Diff/Engine/DiffEngineTest.php

   1 <?php
   2
   3 namespace Drupal\Tests\Component\Diff\Engine;
   4
   5 use Drupal\Component\Diff\Engine\DiffEngine;
   6 use Drupal\Component\Diff\Engine\DiffOpAdd;
   7 use Drupal\Component\Diff\Engine\DiffOpCopy;
   8 use Drupal\Component\Diff\Engine\DiffOpChange;
   9 use Drupal\Component\Diff\Engine\DiffOpDelete;
  10 use PHPUnit\Framework\TestCase;
  11
  12 /**
  13  * Test DiffEngine class.
  14  *
  15  * @coversDefaultClass \Drupal\Component\Diff\Engine\DiffEngine
  16  *
  17  * @group Diff
  18  */
  19 class DiffEngineTest extends TestCase {
  20
  21   /**
  22    * @return array
  23    *   - Expected output in terms of return class. A list of class names
  24    *     expected to be returned by DiffEngine::diff().
  25    *   - An array of strings to change from.
  26    *   - An array of strings to change to.
  27    */
  28   public function provideTestDiff() {
  29     return [
  30       'empty' => [[], [], []],
  31       'add' => [[DiffOpAdd::class], [], ['a']],
  32       'copy' => [[DiffOpCopy::class], ['a'], ['a']],
  33       'change' => [[DiffOpChange::class], ['a'], ['b']],
  34       'copy-and-change' => [
  35         [
  36           DiffOpCopy::class,
  37           DiffOpChange::class,
  38         ],
  39         ['a', 'b'],
  40         ['a', 'c'],
  41       ],
  42       'copy-change-copy' => [
  43         [
  44           DiffOpCopy::class,
  45           DiffOpChange::class,
  46           DiffOpCopy::class,
  47         ],
  48         ['a', 'b', 'd'],
  49         ['a', 'c', 'd'],
  50       ],
  51       'copy-change-copy-add' => [
  52         [
  53           DiffOpCopy::class,
  54           DiffOpChange::class,
  55           DiffOpCopy::class,
  56           DiffOpAdd::class,
  57         ],
  58         ['a', 'b', 'd'],
  59         ['a', 'c', 'd', 'e'],
  60       ],
  61       'copy-delete' => [
  62         [
  63           DiffOpCopy::class,
  64           DiffOpDelete::class,
  65         ],
  66         ['a', 'b', 'd'],
  67         ['a'],
  68       ],
  69     ];
  70   }
  71
  72   /**
  73    * Tests whether op classes returned by DiffEngine::diff() match expectations.
  74    *
  75    * @covers ::diff
  76    * @dataProvider provideTestDiff
  77    */
  78   public function testDiff($expected, $from, $to) {
  79     $diff_engine = new DiffEngine();
  80     $diff = $diff_engine->diff($from, $to);
  81     // Make sure we have the same number of results as expected.
  82     $this->assertCount(count($expected), $diff);
  83     // Make sure the diff objects match our expectations.
  84     foreach ($expected as $index => $op_class) {
  85       $this->assertEquals($op_class, get_class($diff[$index]));
  86     }
  87   }
  88
  89 }