Add test to check that empty config files are ok for generate. Verify #120.

Author: theothertomelliott

edward/generate_test.go

@@ -52,6 +52,18 @@ func TestGenerate(t *testing.T) {
 			force:            true,
 			expectedServices: []string{"edward-test-service"},
 		},
+		{
+			name:   "existing empty config file",
+			path:   "testdata/generate/emptyconfig",
+			config: "edward.json",
+			input:  "Y\n",
+			expectedOutput: `The following will be generated:
+Services:
+	edward-test-service
+Do you wish to continue? [y/n]? Wrote to: ${TMP_PATH}/edward.json
+`,
+			expectedServices: []string{"edward-test-service"},
+		},
 		{
 			name:   "duplicates",
 			path:   "testdata/generate/duplicatenames",

edward/testdata/generate/emptyconfig/edward-test-service/main.go

@@ -0,0 +1,41 @@
+// A simple executable that stays runnning until an interrupt is received
+// Based on: https://gobyexample.com/signals
+package main
+
+import (
+	"fmt"
+	"log"
+	"net/http"
+	"os"
+	"os/signal"
+	"time"
+)
+
+func handler(w http.ResponseWriter, r *http.Request) {
+	fmt.Fprintf(w, "Hello: %s!", r.URL.Path[1:])
+}
+
+func main() {
+	http.HandleFunc("/", handler)
+
+	port := "51936"
+	fmt.Printf("Starting to listen on %v\n", port)
+	go func() {
+		log.Fatal(http.ListenAndServe(":"+port, nil))
+	}()
+
+	timer := time.NewTimer(5 * time.Second)
+	defer timer.Stop()
+
+	stop := make(chan os.Signal, 1)
+	signal.Notify(stop, os.Interrupt)
+
+	select {
+	case <-stop:
+		fmt.Println("Terminated")
+	case <-timer.C:
+		fmt.Println("Timed out")
+	}
+
+	fmt.Println("Exiting")
+}