From 91a1ee956ca527426cc86422fa64ff7b30fd79b3 Mon Sep 17 00:00:00 2001
From: 9seconds <nineseconds@yandex.ru>
Date: Sun, 14 Mar 2021 21:51:14 +0300
Subject: [PATCH] Add noop logger

---
 logger/noop.go      | 19 +++++++++++++++++++
 logger/noop_test.go | 34 ++++++++++++++++++++++++++++++++++
 2 files changed, 53 insertions(+)
 create mode 100644 logger/noop.go
 create mode 100644 logger/noop_test.go

diff --git a/logger/noop.go b/logger/noop.go
new file mode 100644
index 0000000..6d7289c
--- /dev/null
+++ b/logger/noop.go
@@ -0,0 +1,19 @@
+package logger
+
+import "github.com/9seconds/mtg/v2/mtglib"
+
+type noopLogger struct{}
+
+func (n noopLogger) Named(_ string) mtglib.Logger          { return n }
+func (n noopLogger) BindInt(_ string, _ int) mtglib.Logger { return n }
+func (n noopLogger) BindStr(_, _ string) mtglib.Logger     { return n }
+func (n noopLogger) Info(_ string)                         {}
+func (n noopLogger) Warning(_ string)                      {}
+func (n noopLogger) Debug(_ string)                        {}
+func (n noopLogger) InfoError(_ string, _ error)           {}
+func (n noopLogger) WarningError(_ string, _ error)        {}
+func (n noopLogger) DebugError(_ string, _ error)          {}
+
+func NewNoopLogger() mtglib.Logger {
+	return noopLogger{}
+}
diff --git a/logger/noop_test.go b/logger/noop_test.go
new file mode 100644
index 0000000..add8464
--- /dev/null
+++ b/logger/noop_test.go
@@ -0,0 +1,34 @@
+package logger_test
+
+import (
+	"io"
+	"testing"
+
+	"github.com/9seconds/mtg/v2/logger"
+	"github.com/9seconds/mtg/v2/testlib"
+	"github.com/stretchr/testify/suite"
+)
+
+type NoopLoggerTestSuite struct {
+	suite.Suite
+}
+
+func (suite *NoopLoggerTestSuite) TestLog() {
+	suite.Empty(testlib.CaptureStdout(func() {
+		suite.Empty(testlib.CaptureStderr(func() {
+			log := logger.NewNoopLogger().Named("name")
+
+			log.BindInt("int", 1).BindStr("str", "1").Info("info")
+			log.BindInt("int", 1).BindStr("str", "1").Warning("info")
+			log.BindInt("int", 1).BindStr("str", "1").Debug("info")
+			log.BindInt("int", 1).BindStr("str", "1").InfoError("info", io.EOF)
+			log.BindInt("int", 1).BindStr("str", "1").WarningError("info", io.EOF)
+			log.BindInt("int", 1).BindStr("str", "1").DebugError("info", io.EOF)
+		}))
+	}))
+}
+
+func TestNoopLogger(t *testing.T) {
+	t.Parallel()
+	suite.Run(t, &NoopLoggerTestSuite{})
+}