[trivial] added test for logger config keys.

src/core/lombok/ConfigurationKeys.java

@@ -32,8 +32,10 @@ public class ConfigurationKeys {
 	
 	/**
 	 * Makes sure all {@link ConfigurationKey}s in this class are loaded.
+	 * 
+	 * (Calling the method ensures this class is initialized by the class loader; this is enough to initialize all configuration keys).
 	 */
-	public static void ensureKeysLoaded() {};
+	public static void ensureKeysLoaded() {}
 	
 	// ##### main package features #####
 	

test/transform/resource/after-delombok/LoggerConfig.java

@@ -0,0 +1,4 @@
+class LoggerWithConfig {
+	@java.lang.SuppressWarnings("all")
+	private final org.slf4j.Logger myLogger = org.slf4j.LoggerFactory.getLogger(LoggerWithConfig.class);
+}

test/transform/resource/after-ecj/LoggerConfig.java

@@ -0,0 +1,6 @@
+@lombok.extern.slf4j.Slf4j class LoggerWithConfig {
+  private final org.slf4j.Logger myLogger = org.slf4j.LoggerFactory.getLogger(LoggerWithConfig.class);
+  LoggerWithConfig() {
+    super();
+  }
+}

test/transform/resource/before/FlagUsages.java

@@ -1,8 +1,8 @@
-//conf: lombok.Getter.flagUsage = WARNING
-//conf: lombok.experimental.flagUsage = ERROR
+//CONF: lombok.Getter.flagUsage = WARNING
+//CONF: lombok.experimental.flagUsage = ERROR
 public class FlagUsages {
 	@lombok.Getter String x;
-	
+
 	@lombok.experimental.Wither String z;
 
 	public FlagUsages(String x, String y) {

test/transform/resource/before/LoggerConfig.java

@@ -0,0 +1,5 @@
+//CONF: lombok.log.fieldName = myLogger
+//CONF: lombok.log.fieldIsStatic = false
+@lombok.extern.slf4j.Slf4j
+class LoggerWithConfig {
+}