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Edit File: DiffOnlyOutputBuilderTest.php

<?php declare(strict_types=1);
/*
 * This file is part of sebastian/diff.
 *
 * (c) Sebastian Bergmann <sebastian@phpunit.de>
 *
 * For the full copyright and license information, please view the LICENSE
 * file that was distributed with this source code.
 */

namespace SebastianBergmann\Diff\Output;

use PHPUnit\Framework\TestCase;
use SebastianBergmann\Diff\Differ;

/**
 * @covers SebastianBergmann\Diff\Output\DiffOnlyOutputBuilder
 *
 * @uses SebastianBergmann\Diff\Differ
 * @uses SebastianBergmann\Diff\TimeEfficientLongestCommonSubsequenceCalculator
 */
final class DiffOnlyOutputBuilderTest extends TestCase
{
    /**
     * @param string $expected
     * @param string $from
     * @param string $to
     * @param string $header
     *
     * @dataProvider textForNoNonDiffLinesProvider
     */
    public function testDiffDoNotShowNonDiffLines(string $expected, string $from, string $to, string $header = ''): void
    {
        $differ = new Differ(new DiffOnlyOutputBuilder($header));

$this->assertSame($expected, $differ->diff($from, $to));
    }

public function textForNoNonDiffLinesProvider(): array
    {
        return [
            [
                " #Warning: Strings contain different line endings!\n-A\r\n+B\n",
                "A\r\n",
                "B\n",
            ],
            [
                "-A\n+B\n",
                "\nA",
                "\nB",
            ],
            [
                '',
                'a',
                'a',
            ],
            [
                "-A\n+C\n",
                "A\n\n\nB",
                "C\n\n\nB",
            ],
            [
                "header\n",
                'a',
                'a',
                'header',
            ],
            [
                "header\n",
                'a',
                'a',
                "header\n",
            ],
        ];
    }
}