Eris\Quantifier\ForAll::when PHP Метод

    public function when()
    {
        $arguments = func_get_args();
        if ($arguments[0] instanceof Antecedent) {
            $antecedent = $arguments[0];
        } elseif ($arguments[0] instanceof PHPUnit_Framework_Constraint) {
            $antecedent = Antecedent\IndependentConstraintsAntecedent::fromAll($arguments);
        } elseif ($arguments && count($arguments) == 1) {
            $antecedent = Antecedent\SingleCallbackAntecedent::from($arguments[0]);
        } else {
            throw new \InvalidArgumentException("Invalid call to when(): " . var_export($arguments, true));
        }
        $this->antecedents[] = $antecedent;
        return $this;
    }