Merge pull request #14 from kerkerj/feature/add-example-test

Add example to demonstrate how it works with sentry and zap

Author: TheZeroSlave

example_logger_test.go

@@ -0,0 +1,78 @@
+package zapsentry_test
+
+import (
+	"fmt"
+	"log"
+	"time"
+
+	"github.com/getsentry/sentry-go"
+	"go.uber.org/zap"
+	"go.uber.org/zap/zapcore"
+	"go.uber.org/zap/zaptest/observer"
+
+	"github.com/TheZeroSlave/zapsentry"
+)
+
+func ExampleAttachCoreToLogger() {
+	// Setup zap with observer (for testing), originally we use
+	// 		config = zap.NewDevelopmentConfig()
+	//  	logger, err := config.Build()
+	// to build zap logger, here we use zap/zaptest/observer for testing
+	core, recordedLogs := observer.New(zapcore.DebugLevel)
+	logger := zap.New(core, zap.AddStacktrace(zap.DebugLevel))
+
+	// Setup mock sentry client for testing, in general we use sentry.NewClient
+	var recordedSentryEvent *sentry.Event
+	sentryClient := mockSentryClient(func(event *sentry.Event) {
+		recordedSentryEvent = event
+	})
+
+	// Setup zapsentry
+	core, err := zapsentry.NewCore(zapsentry.Configuration{
+		Level: zapcore.ErrorLevel, // when to send message to sentry
+		Tags: map[string]string{
+			"component": "system",
+		},
+	}, zapsentry.NewSentryClientFromClient(sentryClient))
+	if err != nil {
+		log.Fatal(err)
+	}
+	newLogger := zapsentry.AttachCoreToLogger(core, logger)
+
+	// Send error log
+	newLogger.Error("[error] something went wrong!", zap.String("method", "unknown"))
+
+	// Check output
+	fmt.Println(recordedLogs.All()[0].Message)
+	fmt.Println(recordedSentryEvent.Message)
+	fmt.Println(recordedSentryEvent.Extra)
+	// Output: [error] something went wrong!
+	// [error] something went wrong!
+	// map[method:unknown]
+}
+
+func mockSentryClient(f func(event *sentry.Event)) *sentry.Client {
+	client, _ := sentry.NewClient(sentry.ClientOptions{
+		Dsn:              "",
+		Transport:        &transport{MockSendEvent: f},
+	})
+	return client
+}
+
+type transport struct {
+	MockSendEvent func(event *sentry.Event)
+}
+
+// Flush waits until any buffered events are sent to the Sentry server, blocking
+// for at most the given timeout. It returns false if the timeout was reached.
+func (f *transport) Flush(_ time.Duration) bool { return true }
+
+// Configure is called by the Client itself, providing it it's own ClientOptions.
+func (f *transport) Configure(_ sentry.ClientOptions) {}
+
+// SendEvent assembles a new packet out of Event and sends it to remote server.
+// We use this method to capture the event for testing
+func (f *transport) SendEvent(event *sentry.Event) {
+	f.MockSendEvent(event)
+}
+