Chris@13: <?php declare(strict_types=1);
Chris@13: 
Chris@13: namespace PhpParser\Internal;
Chris@13: 
Chris@17: class DifferTest extends \PHPUnit\Framework\TestCase
Chris@13: {
Chris@13:     private function formatDiffString(array $diff) {
Chris@13:         $diffStr = '';
Chris@13:         foreach ($diff as $diffElem) {
Chris@13:             switch ($diffElem->type) {
Chris@13:                 case DiffElem::TYPE_KEEP:
Chris@13:                     $diffStr .= $diffElem->old;
Chris@13:                     break;
Chris@13:                 case DiffElem::TYPE_REMOVE:
Chris@13:                     $diffStr .= '-' . $diffElem->old;
Chris@13:                     break;
Chris@13:                 case DiffElem::TYPE_ADD:
Chris@13:                     $diffStr .= '+' . $diffElem->new;
Chris@13:                     break;
Chris@13:                 case DiffElem::TYPE_REPLACE:
Chris@13:                     $diffStr .= '/' . $diffElem->old . $diffElem->new;
Chris@13:                     break;
Chris@13:                 default:
Chris@13:                     assert(false);
Chris@13:                     break;
Chris@13:             }
Chris@13:         }
Chris@13:         return $diffStr;
Chris@13:     }
Chris@13: 
Chris@13:     /** @dataProvider provideTestDiff */
Chris@13:     public function testDiff($oldStr, $newStr, $expectedDiffStr) {
Chris@13:         $differ = new Differ(function($a, $b) { return $a === $b; });
Chris@13:         $diff = $differ->diff(str_split($oldStr), str_split($newStr));
Chris@13:         $this->assertSame($expectedDiffStr, $this->formatDiffString($diff));
Chris@13:     }
Chris@13: 
Chris@13:     public function provideTestDiff() {
Chris@13:         return [
Chris@13:             ['abc', 'abc', 'abc'],
Chris@13:             ['abc', 'abcdef', 'abc+d+e+f'],
Chris@13:             ['abcdef', 'abc', 'abc-d-e-f'],
Chris@13:             ['abcdef', 'abcxyzdef', 'abc+x+y+zdef'],
Chris@13:             ['axyzb', 'ab', 'a-x-y-zb'],
Chris@13:             ['abcdef', 'abxyef', 'ab-c-d+x+yef'],
Chris@13:             ['abcdef', 'cdefab', '-a-bcdef+a+b'],
Chris@13:         ];
Chris@13:     }
Chris@13: 
Chris@13:     /** @dataProvider provideTestDiffWithReplacements */
Chris@13:     public function testDiffWithReplacements($oldStr, $newStr, $expectedDiffStr) {
Chris@13:         $differ = new Differ(function($a, $b) { return $a === $b; });
Chris@13:         $diff = $differ->diffWithReplacements(str_split($oldStr), str_split($newStr));
Chris@13:         $this->assertSame($expectedDiffStr, $this->formatDiffString($diff));
Chris@13:     }
Chris@13: 
Chris@13:     public function provideTestDiffWithReplacements() {
Chris@13:         return [
Chris@13:             ['abcde', 'axyze', 'a/bx/cy/dze'],
Chris@13:             ['abcde', 'xbcdy', '/axbcd/ey'],
Chris@13:             ['abcde', 'axye', 'a-b-c-d+x+ye'],
Chris@13:             ['abcde', 'axyzue', 'a-b-c-d+x+y+z+ue'],
Chris@13:         ];
Chris@13:     }
Chris@13: }