TimedImagePreviewStrategy: use NOPLogger for unit tests to reduce output to console.

No functional changes.

Author: php-coder

src/main/java/ru/mystamps/web/config/ServicesConfig.java

@@ -94,7 +94,10 @@ public ImageService getImageService() {
 		return new ImageServiceImpl(
 			LoggerFactory.getLogger(ImageServiceImpl.class),
 			strategiesConfig.getImagePersistenceStrategy(),
-			new TimedImagePreviewStrategy(new ThumbnailatorImagePreviewStrategy()),
+			new TimedImagePreviewStrategy(
+				LoggerFactory.getLogger(TimedImagePreviewStrategy.class),
+				new ThumbnailatorImagePreviewStrategy()
+			),
 			daoConfig.getImageDao()
 		);
 	}

src/main/java/ru/mystamps/web/service/TimedImagePreviewStrategy.java

@@ -21,14 +21,13 @@
 import org.apache.commons.lang3.time.StopWatch;
 
 import org.slf4j.Logger;
-import org.slf4j.LoggerFactory;
 
 import lombok.RequiredArgsConstructor;
 
 @RequiredArgsConstructor
 public class TimedImagePreviewStrategy implements ImagePreviewStrategy {
-	private static final Logger LOG = LoggerFactory.getLogger(TimedImagePreviewStrategy.class);
 
+	private final Logger log;
 	private final ImagePreviewStrategy strategy;
 
 	@Override
@@ -46,7 +45,7 @@ public byte[] createPreview(byte[] image) {
 		byte[] result = strategy.createPreview(image);
 		timer.stop();
 
-		LOG.debug(
+		log.debug(
 			"Image preview has been generated in {} msecs: {} -> {} bytes",
 			timer.getTime(),
 			// let's hope that it won't throw IllegalStateException :)