unify tests for all compression extensions

src/globals/ext-tests/brotli.php

@@ -2,7 +2,14 @@
 
 declare(strict_types=1);
 
-$str = 'brotli_compress ( string $data, int $level = BROTLI_COMPRESS_LEVEL_DEFAULT, int $mode = BROTLI_GENERIC, string|null $dict = null ): string|false';
 assert(function_exists('brotli_compress'));
 assert(function_exists('brotli_uncompress'));
-assert(brotli_uncompress(brotli_compress($str)) === $str);
+
+$input = str_repeat('The quick brown fox jumps over the lazy dog. ', 10);
+$compressed = brotli_compress($input);
+assert(is_string($compressed));
+assert(strlen($compressed) < strlen($input));
+
+$uncompressed = brotli_uncompress($compressed);
+assert(is_string($uncompressed));
+assert($uncompressed === $input);