Allow regenerating expected formatter outputs

CONTRIBUTING.md

@@ -20,3 +20,7 @@ vendor/bin/phpunit --testdox
 echo '' | vendor/bin/phpcs
 vendor/bin/phpstan analyze
 ```
+
+## Regenerating expected output
+
+To regenerate expected tests output, run `bin/regenerate-expected-output`.

bin/regenerate-expected-output

@@ -0,0 +1,29 @@
+#!/usr/bin/env php
+<?php
+
+use Doctrine\SqlFormatter\CliHighlighter;
+use Doctrine\SqlFormatter\HtmlHighlighter;
+use Doctrine\SqlFormatter\NullHighlighter;
+use Doctrine\SqlFormatter\SqlFormatter;
+use Doctrine\SqlFormatter\Tests\SqlFormatterTest;
+
+require __DIR__ . '/../vendor/autoload.php';
+
+$formatter = new SqlFormatter(new HtmlHighlighter());
+
+updateExpected('format-highlight.html', [$formatter, 'format']);
+updateExpected('format.txt', [new SqlFormatter(new NullHighlighter()), 'format']);
+updateExpected('highlight.html', [$formatter, 'highlight']);
+updateExpected('clihighlight.txt', [new SqlFormatter(new CliHighlighter()), 'format']);
+updateExpected('compress.txt', [$formatter, 'compress']);
+
+function updateExpected(string $filename, callable $highlight): void
+{
+	$data = [];
+
+	foreach (SqlFormatterTest::fileSqlData() as $sql) {
+		$data[] = rtrim($highlight($sql), "\n");
+	}
+
+	file_put_contents(__DIR__ . '/../tests/' . $filename, implode("\n---\n", $data) . "\n");
+}

tests/SqlFormatterTest.php

@@ -101,7 +101,7 @@ final class SqlFormatterTest extends TestCase
     }
 
     /** @return string[] */
-    private static function fileSqlData(): array
+    public static function fileSqlData(): array
     {
         $contents = file_get_contents(__DIR__ . '/sql.sql');
         assert($contents !== false);