added cachestore.TestConnection to fix #84 and #85 (#88)

Author: deven96

templates/go.mod

@@ -9,4 +9,10 @@ require (
 <%- if eq (index .Params `billingEnabled`) "yes" %>
 	github.com/stripe/stripe-go/v72 v72.43.0
 <%- end %>
+<%- if eq (index .Params `cacheStore`) "redis" %>
+	github.com/go-redis/redis/v8 v8.11.4
+<%- end %>
+<%- if eq (index .Params `cacheStore`) "memcached" %>
+	github.com/bradfitz/gomemcache/memcache v0.0.0-20190913173617-a41fca850d0b
+<%- end %>
 )

templates/internal/cachestore/cachestore.go

@@ -0,0 +1,42 @@
+package cachestore
+
+import (
+	"os"
+	"fmt"
+<%if eq (index .Params `cachestore`) "redis" %>	
+	"context"
+	"github.com/go-redis/redis/v8"
+<% end %>
+<%if eq (index .Params `cachestore`) "memcached" %>	
+	"github.com/bradfitz/gomemcache/memcache"
+<% end %>
+)
+
+var cacheEndpoint = os.Getenv("CACHE_ENDPOINT")
+var cachePort = os.Getenv("CACHE_PORT")
+
+<%if eq (index .Params `cachestore`) "redis" %>	
+func TestConnection() {
+	context := context.Background()
+	rdb := redis.NewClient(&redis.Options{
+		Addr:     fmt.Sprintf("%s:%s", cacheEndpoint, cachePort),
+		Password: "", // no password set
+		DB:       0,  // use default DB
+	})
+
+	err := rdb.Set(ctx, "cache-test", "value", 0).Err()
+	if err != nil {
+		panic(err)
+	}
+}
+<% end %>
+
+<%if eq (index .Params `cachestore`) "memcached" %>	
+func TestConnection() {
+	mc := memcache.New(fmt.Sprintf("%s:%s", cacheEndpoint, cachePort))
+	err := mc.Set(&memcache.Item{Key: "cache-test", Value: []byte("value")})
+	if err != nil {
+		panic(err)
+	}
+}
+<% end %>

templates/main.go

@@ -24,6 +24,9 @@ import (
 <%if eq (index .Params `billingEnabled`) "yes" %>	
 	"<% .Files.Repository %>/internal/billing"
 <%- end %>
+<%if neq (index .Params `cachestore`) "none" %>	
+    "<% .Files.Repository %>/internal/cachestore"
+<% end %>
 )
 
 const gracefulShutdownTimeout = 10 * time.Second
@@ -35,6 +38,11 @@ func main() {
 	db := database.Connect()
 	db.TestConnection()
 
+<%if neq (index .Params `cachestore`) "none" %>	
+	// test cacheStore connection
+	cachestore.TestConnection()
+<% end %>
+
 	r := http.NewServeMux()
 	r.HandleFunc("/status/ready", readinessCheckEndpoint)