Logger interface and tmLogger impl based on go-kit

log/tm_logger_test.go

@@ -0,0 +1,41 @@
+package log_test
+
+import (
+	"io/ioutil"
+	"testing"
+
+	"github.com/tendermint/tmlibs/log"
+)
+
+func TestTmLogger(t *testing.T) {
+	t.Parallel()
+	logger := log.NewTmLogger(ioutil.Discard)
+	if err := logger.Info("Hello", "abc", 123); err != nil {
+		t.Error(err)
+	}
+	if err := log.With(logger, "def", "ghi").Debug(""); err != nil {
+		t.Error(err)
+	}
+}
+
+func BenchmarkTmLoggerSimple(b *testing.B) {
+	benchmarkRunner(b, log.NewTmLogger(ioutil.Discard), baseInfoMessage)
+}
+
+func BenchmarkTmLoggerContextual(b *testing.B) {
+	benchmarkRunner(b, log.NewTmLogger(ioutil.Discard), withInfoMessage)
+}
+
+func benchmarkRunner(b *testing.B, logger log.Logger, f func(log.Logger)) {
+	lc := log.With(logger, "common_key", "common_value")
+	b.ReportAllocs()
+	b.ResetTimer()
+	for i := 0; i < b.N; i++ {
+		f(lc)
+	}
+}
+
+var (
+	baseInfoMessage = func(logger log.Logger) { logger.Info("foo_message", "foo_key", "foo_value") }
+	withInfoMessage = func(logger log.Logger) { log.With(logger, "a", "b").Info("c", "d", "f") }
+)