should print max information by default

When tests do not fail, what they printed rarely
matters. However, when they do fail, it is important
to see maximum information. This change switches
default behavior back as was in 0.31, when failures
could be quickly triaged without adding -v

Author: strowk

log/logger.go

@@ -19,16 +19,17 @@ type Logger interface {
 	Printf(format string, v ...any)
 }
 
-// defaultLogger is the default Logger instance.
-var defaultLogger Logger = &noopLogger{}
+// defaultLogger would print available information to stderr
+var defaultLogger Logger = log.New(os.Stderr, "", log.LstdFlags)
 
 func init() {
 	// Enable default logger in the testing with a verbose flag.
 	if testing.Testing() {
-		// Parse manually because testing.Verbose() panics unless flag.Parse() has done.
+		// Disble logging if explicitly disabled via -test.v=false
 		for _, arg := range os.Args {
-			if strings.EqualFold(arg, "-test.v=true") || strings.EqualFold(arg, "-v") {
-				defaultLogger = log.New(os.Stderr, "", log.LstdFlags)
+			if strings.EqualFold(arg, "-test.v=false") {
+				defaultLogger = &noopLogger{}
+				break
 			}
 		}
 	}