add a test-cli to run smoke tests manually

Signed-off-by: Ahmet Alp Balkan <ahmetb@google.com>

src/test-cli/genproto.sh

@@ -0,0 +1,6 @@
+#!/bin/bash -e
+
+PATH=$PATH:$GOPATH/bin
+protodir=../../pb
+
+protoc --go_out=plugins=grpc:genproto -I $protodir $protodir/demo.proto

src/test-cli/main.go

@@ -0,0 +1,78 @@
+package main
+
+import (
+	"context"
+	"log"
+	"os"
+
+	pb "./genproto"
+	"google.golang.org/grpc"
+)
+
+type test struct {
+	envs []string
+	f    func() error
+}
+
+var (
+	svcs = map[string]test{
+		"productcatalogservice": {
+			envs: []string{"PRODUCT_CATALOG_SERVICE_ADDR"},
+			f:    testProductCatalogService,
+		},
+	}
+)
+
+func main() {
+	if len(os.Args) != 2 {
+		panic("incorrect usage")
+	}
+	t, ok := svcs[os.Args[1]]
+	if !ok {
+		log.Fatalf("test probe for %q not found", os.Args[1])
+	}
+	for _, e := range t.envs {
+		if os.Getenv(e) == "" {
+			log.Fatalf("environment variable %q not set", e)
+		}
+	}
+	if err := t.f(); err != nil {
+		panic(err)
+	}
+	log.Println("PASS")
+}
+
+func testProductCatalogService() error {
+	addr := os.Getenv("PRODUCT_CATALOG_SERVICE_ADDR")
+	conn, err := grpc.Dial(addr, grpc.WithInsecure())
+	if err != nil {
+		return err
+	}
+	defer conn.Close()
+
+	log.Printf("--- rpc ListProducts() ")
+	cl := pb.NewProductCatalogServiceClient(conn)
+	listResp, err := cl.ListProducts(context.TODO(), &pb.Empty{})
+	if err != nil {
+		return err
+	}
+	log.Printf("--> %d products returned", len(listResp.GetProducts()))
+	for _, v := range listResp.GetProducts() {
+		log.Printf("--> %+v", v)
+	}
+
+	log.Println("--- rpc GetProduct()")
+	getResp, err := cl.GetProduct(context.TODO(), &pb.GetProductRequest{Id: 1})
+	if err != nil {
+		return err
+	}
+	log.Printf("retrieved product: %+v", getResp)
+	log.Printf("--- rpc SearchProducts()")
+	searchResp, err := cl.SearchProducts(context.TODO(), &pb.SearchProductsRequest{Query: "shirt"})
+	if err != nil {
+		return err
+	}
+	log.Printf("--> %d results found", len(searchResp.GetResults()))
+
+	return nil
+}