feat(log): add NewTestLogger{Info,Error} constructors (#15604)

log/testing.go

@@ -8,10 +8,37 @@ type TestingT zerolog.TestingLog
 
 // NewTestLogger returns a logger that calls t.Log to write entries.
 //
+// The returned logger emits messages at any level.
+// For active debugging of a test with verbose logs,
+// the [NewTestLoggerInfo] and [NewTestLoggerError] functions
+// only emit messages at or above the corresponding log levels.
+//
 // If the logs may help debug a test failure,
 // you may want to use NewTestLogger(t) in your test.
 // Otherwise, use NewNopLogger().
 func NewTestLogger(t TestingT) Logger {
+	return newTestLogger(t, zerolog.DebugLevel)
+}
+
+// NewTestLoggerInfo returns a test logger that filters out messages
+// below info level.
+//
+// This is primarily helpful during active debugging of a test
+// with verbose logs.
+func NewTestLoggerInfo(t TestingT) Logger {
+	return newTestLogger(t, zerolog.InfoLevel)
+}
+
+// NewTestLoggerError returns a test logger that filters out messages
+// below Error level.
+//
+// This is primarily helpful during active debugging of a test
+// with verbose logs.
+func NewTestLoggerError(t TestingT) Logger {
+	return newTestLogger(t, zerolog.ErrorLevel)
+}
+
+func newTestLogger(t TestingT, lvl zerolog.Level) Logger {
 	cw := zerolog.NewConsoleWriter()
 	cw.Out = zerolog.TestWriter{
 		T: t,
@@ -22,5 +49,5 @@ func NewTestLogger(t TestingT) Logger {
 		// but Frame=7 prints correct source locations.
 		Frame: 7,
 	}
-	return NewCustomLogger(zerolog.New(cw))
+	return NewCustomLogger(zerolog.New(cw).Level(lvl))
 }