public function fixture($key, $val = null)
{
if (!is_null($val)) {
\FUnit::debug_out("setting fixture {$key} to " . \FUnit::val_to_string($val));
$this->fixtures[$key] = $val;
}
if (!array_key_exists($key, $this->fixtures)) {
$f_val = null;
} else {
$f_val = $this->fixtures[$key];
}
\FUnit::debug_out("returning fixture {$key} as " . \FUnit::val_to_string($f_val));
return $f_val;
}