Bugfix/no handler

CHANGELOG.md

+## [Unreleased]
+### Fixed
+- Fixed no handler actually assigned when using combination of
+	NullHandler and actual one
+
 ## [1.7.1] - 2022-04-15
 ### Fixed
 - Fixed the getLogger method from SimpleLoggerFactory

src/SimpleLoggerFactory.php

@@ -32,26 +32,23 @@ final class SimpleLoggerFactory implements LoggerFactory {
 
 		$logger = new Logger( $this->channel );
 
-		$wc_handler = $this->get_wc_handler();
-		if ( $this->options->use_wc_log ) {
-			$logger->pushHandler( $wc_handler );
+		if ( $this->options->use_wc_log && \function_exists( 'wc_get_logger' ) ) {
+			$logger->pushHandler(
+				new WooCommerceHandler(
+					\wc_get_logger(),
+					$this->options->levels
+				)
+			);
 		}
 
-		if ( $this->options->use_wp_log || $wc_handler instanceof NullHandler ) {
+		// Adding WooCommerce logger may have failed, if so add WP by default.
+		if ( $this->options->use_wp_log || empty( $logger->getHandlers() ) ) {
 			$logger->pushHandler( $this->get_wp_handler() );
 		}
 
 		return $this->logger = $logger;
 	}
 
-	private function get_wc_handler(): HandlerInterface {
-		if ( function_exists( 'wc_get_logger' ) ) {
-			return new WooCommerceHandler( wc_get_logger(), $this->options->level );
-		}
-
-		return new NullHandler();
-	}
-
 	private function get_wp_handler(): HandlerInterface {
 		if ( defined( 'WP_DEBUG_LOG' ) && WP_DEBUG_LOG ) {
 			return new ErrorLogHandler( ErrorLogHandler::OPERATING_SYSTEM, $this->options->level );