aleph1.co.uk Git - yaffs-website/blob - web/core/tests/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
  11 /**
  12  * Test DiffEngine class.
  13  *
  14  * @coversDefaultClass \Drupal\Component\Diff\Engine\DiffEngine
  15  *
  16  * @group Diff
  17  */
  18 class DiffEngineTest extends \PHPUnit_Framework_TestCase {
  19
  20   /**
  21    * @return array
  22    *   - Expected output in terms of return class. A list of class names
  23    *     expected to be returned by DiffEngine::diff().
  24    *   - An array of strings to change from.
  25    *   - An array of strings to change to.
  26    */
  27   public function provideTestDiff() {
  28     return [
  29       'empty' => [[], [], []],
  30       'add' => [[DiffOpAdd::class], [], ['a']],
  31       'copy' => [[DiffOpCopy::class], ['a'], ['a']],
  32       'change' => [[DiffOpChange::class], ['a'], ['b']],
  33       'copy-and-change' => [
  34         [
  35           DiffOpCopy::class,
  36           DiffOpChange::class,
  37         ],
  38         ['a', 'b'],
  39         ['a', 'c'],
  40       ],
  41       'copy-change-copy' => [
  42         [
  43           DiffOpCopy::class,
  44           DiffOpChange::class,
  45           DiffOpCopy::class,
  46         ],
  47         ['a', 'b', 'd'],
  48         ['a', 'c', 'd'],
  49       ],
  50       'copy-change-copy-add' => [
  51         [
  52           DiffOpCopy::class,
  53           DiffOpChange::class,
  54           DiffOpCopy::class,
  55           DiffOpAdd::class,
  56         ],
  57         ['a', 'b', 'd'],
  58         ['a', 'c', 'd', 'e'],
  59       ],
  60       'copy-delete' => [
  61         [
  62           DiffOpCopy::class,
  63           DiffOpDelete::class,
  64         ],
  65         ['a', 'b', 'd'],
  66         ['a'],
  67       ],
  68     ];
  69   }
  70
  71   /**
  72    * Tests whether op classes returned by DiffEngine::diff() match expectations.
  73    *
  74    * @covers ::diff
  75    * @dataProvider provideTestDiff
  76    */
  77   public function testDiff($expected, $from, $to) {
  78     $diff_engine = new DiffEngine();
  79     $diff = $diff_engine->diff($from, $to);
  80     // Make sure we have the same number of results as expected.
  81     $this->assertCount(count($expected), $diff);
  82     // Make sure the diff objects match our expectations.
  83     foreach ($expected as $index => $op_class) {
  84       $this->assertEquals($op_class, get_class($diff[$index]));
  85     }
  86   }
  87
  88 }