Add support for grpclog.LoggerV2

Makefile

@@ -7,7 +7,7 @@ BENCH_FLAGS ?= -cpuprofile=cpu.pprof -memprofile=mem.pprof -benchmem
 # Directories containing independent Go modules.
 #
 # We track coverage only for the main module.
-MODULE_DIRS = . ./benchmarks
+MODULE_DIRS = . ./benchmarks ./zapgrpc/internal/test
 
 # Many Go tools take file globs or directories as arguments instead of packages.
 GO_FILES := $(shell \

zapgrpc/internal/test/README.md

@@ -0,0 +1,2 @@
+This submodule exists to test zapgrpc against grpc-go without adding a
+dependency on grpc-go to Zap.

zapgrpc/internal/test/go.mod

@@ -0,0 +1,11 @@
+module go.uber.org/zap/zapgrpc/internal/test
+
+go 1.15
+
+require (
+	github.com/stretchr/testify v1.5.1
+	go.uber.org/zap v1.16.0
+	google.golang.org/grpc v1.35.0
+)
+
+replace go.uber.org/zap => ../../..

zapgrpc/internal/test/go.sum

@@ -0,0 +1,123 @@
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+honnef.co/go/tools v0.0.0-20190523083050-ea95bdfd59fc/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4=
+honnef.co/go/tools v0.0.1-2019.2.3 h1:3JgtbtFHMiCmsznwGVTUWbgGov+pVqnlf1dEJTNAXeM=
+honnef.co/go/tools v0.0.1-2019.2.3/go.mod h1:a3bituU0lyd329TUQxRnasdCoJDkEUEAqEt0JzvZhAg=

zapgrpc/internal/test/grpc_test.go

@@ -0,0 +1,51 @@
+// Copyright (c) 2021 Uber Technologies, Inc.
+//
+// Permission is hereby granted, free of charge, to any person obtaining a copy
+// of this software and associated documentation files (the "Software"), to deal
+// in the Software without restriction, including without limitation the rights
+// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+// copies of the Software, and to permit persons to whom the Software is
+// furnished to do so, subject to the following conditions:
+//
+// The above copyright notice and this permission notice shall be included in
+// all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+// THE SOFTWARE.
+
+package main
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/require"
+	"go.uber.org/zap"
+	"go.uber.org/zap/zapcore"
+	"go.uber.org/zap/zapgrpc"
+	"go.uber.org/zap/zaptest/observer"
+	"google.golang.org/grpc/grpclog"
+)
+
+func TestLoggerV2(t *testing.T) {
+	core, observedLogs := observer.New(zapcore.InfoLevel)
+	zlog := zap.New(core)
+
+	grpclog.SetLoggerV2(zapgrpc.NewLogger(zlog))
+
+	grpclog.Info("hello from grpc")
+
+	logs := observedLogs.TakeAll()
+	require.Len(t, logs, 1, "Expected one log entry.")
+	entry := logs[0]
+
+	assert.Equal(t, zapcore.InfoLevel, entry.Level,
+		"Log entry level did not match.")
+	assert.Equal(t, "hello from grpc", entry.Message,
+		"Log entry message did not match.")
+}