From 1a52c539f26247e94ea61366ddf3ff5df13c12a5 Mon Sep 17 00:00:00 2001
From: Akira Hayashi <akira.hayashi@route06.co.jp>
Date: Thu, 20 Jul 2023 14:36:45 +0900
Subject: [PATCH 1/2] Add endpoint `/health` for health checking

---
 pkg/controller/server/healthcheck.go | 10 ++++++++++
 pkg/controller/server/server.go      |  2 ++
 2 files changed, 12 insertions(+)
 create mode 100644 pkg/controller/server/healthcheck.go

diff --git a/pkg/controller/server/healthcheck.go b/pkg/controller/server/healthcheck.go
new file mode 100644
index 0000000..1772b63
--- /dev/null
+++ b/pkg/controller/server/healthcheck.go
@@ -0,0 +1,10 @@
+package server
+
+import "net/http"
+
+func handleHealthCheckRequest() http.HandlerFunc {
+	return func(w http.ResponseWriter, r *http.Request) {
+		w.WriteHeader(http.StatusOK)
+		w.Write([]byte("OK"))
+	}
+}
diff --git a/pkg/controller/server/server.go b/pkg/controller/server/server.go
index 68dc30f..01b12dd 100644
--- a/pkg/controller/server/server.go
+++ b/pkg/controller/server/server.go
@@ -32,6 +32,8 @@ func New(uc *usecase.Usecase) *Server {
 
 	r.Post("/webhook/github", serveGitHubWebhook(uc))
 
+	r.Get("/health", handleHealthCheckRequest())
+
 	return &Server{
 		uc:  uc,
 		mux: r,

From 47b983706d6404e921c477fd30570800a6ce6fee Mon Sep 17 00:00:00 2001
From: Akira Hayashi <akira.hayashi@route06.co.jp>
Date: Thu, 20 Jul 2023 15:01:03 +0900
Subject: [PATCH 2/2] Test endpoint `/health`

---
 pkg/controller/server/healthcheck_test.go | 20 ++++++++++++++++++++
 1 file changed, 20 insertions(+)
 create mode 100644 pkg/controller/server/healthcheck_test.go

diff --git a/pkg/controller/server/healthcheck_test.go b/pkg/controller/server/healthcheck_test.go
new file mode 100644
index 0000000..ee011b5
--- /dev/null
+++ b/pkg/controller/server/healthcheck_test.go
@@ -0,0 +1,20 @@
+package server_test
+
+import (
+	"net/http/httptest"
+	"testing"
+
+	"github.com/m-mizutani/ghnotify/pkg/controller/server"
+	"github.com/m-mizutani/ghnotify/pkg/usecase"
+	"github.com/stretchr/testify/assert"
+)
+
+func TestHealthCheck(t *testing.T) {
+	srv := server.New(&usecase.Usecase{})
+
+	w := httptest.NewRecorder()
+	r := httptest.NewRequest("GET", "/health", nil)
+	srv.ServeHTTP(w, r)
+
+	assert.Equal(t, 200, w.Code)
+}