Constructor.
PHP_CodeCoverage_Driver $driver:
PHP_CodeCoverage_Filter $filter:
public function __construct(PHP_CodeCoverage_Driver $driver = NULL, PHP_CodeCoverage_Filter $filter = NULL) {
if ($driver === NULL) {
$driver = new PHP_CodeCoverage_Driver_Xdebug();
}
if ($filter === NULL) {
$filter = new PHP_CodeCoverage_Filter();
}
$this->driver = $driver;
$this->filter = $filter;
}