add some tests

core/polyfills.php

@@ -792,36 +792,6 @@ function iterator_map_to_array(callable $callback, iterator $iter): array
     return iterator_to_array(iterator_map($callback, $iter));
 }
 
-function get_class_from_file(string $file): string
-{
-    $fp = fopen($file, 'r');
-    $class = $buffer = '';
-    $i = 0;
-    while (!$class) {
-        if (feof($fp)) {
-            break;
-        }
-
-        $buffer .= fread($fp, 512);
-        $tokens = token_get_all($buffer);
-
-        if (strpos($buffer, '{') === false) {
-            continue;
-        }
-
-        for (;$i<count($tokens);$i++) {
-            if ($tokens[$i][0] === T_CLASS) {
-                for ($j=$i+1;$j<count($tokens);$j++) {
-                    if ($tokens[$j] === '{') {
-                        $class = $tokens[$i+2][1];
-                    }
-                }
-            }
-        }
-    }
-    return $class;
-}
-
 function stringer($s)
 {
     if (is_array($s)) {