PHPUnit_Framework_Constraint_IsType::__construct PHP Method

    public function __construct($type)
    {
        if (!isset($this->types[$type])) {
            throw new InvalidArgumentException(sprintf('Type specified for PHPUnit_Framework_Constraint_IsType <%s> ' . 'is not a valid type.', $type));
        }
        $this->type = $type;
    }