check level, add test

internal/autocert/certmagic_logger.go

@@ -23,6 +23,9 @@ func (c certMagicLoggerCore) With(fs []zapcore.Field) zapcore.Core {
 }
 
 func (c certMagicLoggerCore) Check(e zapcore.Entry, ce *zapcore.CheckedEntry) *zapcore.CheckedEntry {
+	if !c.Enabled(e.Level) {
+		return ce
+	}
 	return ce.AddCore(e, c)
 }
 

internal/autocert/certmagic_logger_test.go

@@ -0,0 +1,28 @@
+package autocert
+
+import (
+	"bytes"
+	"errors"
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+	"go.uber.org/zap"
+	"go.uber.org/zap/zapcore"
+)
+
+func TestCertMagicLogger(t *testing.T) {
+	t.Parallel()
+
+	encoder := zapcore.NewJSONEncoder(zap.NewProductionEncoderConfig())
+	var buf bytes.Buffer
+	core := zapcore.NewCore(encoder, zapcore.AddSync(&buf), zapcore.DebugLevel)
+	core = certMagicLoggerCore{core: core}
+
+	logger := zap.New(core)
+
+	logger.Info("TEST", zap.Error(errors.New("no OCSP server specified in certificate")))
+	assert.Empty(t, buf.Bytes())
+
+	logger.Info("TEST")
+	assert.NotEmpty(t, buf.Bytes())
+}