Fix logging related err in status ref

Author: eelstork

Src/Details/Stateful/StatusRef.cs

@@ -38,12 +38,13 @@ static status ToStatus(StatusRef? self)
 
      internal static void SetLogData(AbstractDecorator dec,
                               object target, string reason){
+        if(!status.log) return;
         if(checkLogData && staticLogData.HasValue)
             throw new InvOp("Clear log data first");
         staticLogData = new LogData(dec, target, reason);
     }
 
-    // Only for testing; do not use.
+    // Only for unit testing; do not use.
     internal static void ClearLogData() => staticLogData = null;
 
      internal static status ToStatusWithLog(StatusRef? self){
@@ -53,6 +54,7 @@ internal static status ToStatusWithLog(StatusRef? self){
                          ι.logData.scope,
                          log && ι.logData.Reason());
          }else{
+             if(!status.log) return hold;
              var scope  = staticLogData.Value.scope;
              var reason = staticLogData.Value.Reason();
              if(scope == null) throw new InvOp("scope is null");

Tests/TestStatusRef.cs

@@ -48,9 +48,12 @@ [Test] public void ToStatusWithLog([Values(true, false)] bool lg){
         StatusRef.ToStatusWithLog(x);
     }
 
-    [Test] public void ToStatusWithLog_badScope(){
+    [Test] public void ToStatusWithLog_badScope([Values(true, false)] bool lg){
+        status.log = lg;
         StatusRef.SetLogData(null, null, null);
-        Assert.Throws<InvOp>( () => StatusRef.ToStatusWithLog(null) );
+        if(status.log)
+            Assert.Throws<InvOp>(
+                () => StatusRef.ToStatusWithLog(null) );
     }
 
     [Test] public void ToStatusWithLog_nullRef([Values(true, false)]