Test file_validate_size().
function testFileValidateSize() {
// Create a file with a size of 1000 bytes, and quotas of only 1 byte.
$file = new stdClass();
$file->filesize = 1000;
$errors = file_validate_size($file, 0, 0);
$this
->assertEqual(count($errors), 0, 'No limits means no errors.', 'File');
$errors = file_validate_size($file, 1, 0);
$this
->assertEqual(count($errors), 1, 'Error for the file being over the limit.', 'File');
$errors = file_validate_size($file, 0, 1);
$this
->assertEqual(count($errors), 1, 'Error for the user being over their limit.', 'File');
$errors = file_validate_size($file, 1, 1);
$this
->assertEqual(count($errors), 2, 'Errors for both the file and their limit.', 'File');
}