function testSeekLineBack()
{
$this->createFile(100);
$fh = fopen($this->file, 'r');
for ($i = 1; $i <= 50; $i++) {
$l = fgets($fh);
}
$position = File::seekLineBack($fh, 5);
$this->assertEquals(126, $position);
$line = fgets($fh);
$this->assertEquals("46\n", $line);
fclose($fh);
}
