api handler generate incompletely while has no request (#158)

* fix: api handler generate incompletely while has no request

* fix: api handler generate incompletely while has no request

* add handler generate test

tools/goctl/api/gogen/gen_test.go

@@ -178,6 +178,13 @@ service A-api {
 }
 `
 
+const apiHasNoRequest = `
+service A-api {
+  @handler GreetHandler
+  post /greet/ping ()
+}
+`
+
 func TestParser(t *testing.T) {
 	filename := "greet.api"
 	err := ioutil.WriteFile(filename, []byte(testApiTemplate), os.ModePerm)
@@ -311,6 +318,21 @@ func TestApiHasJwtAndMiddleware(t *testing.T) {
 	validate(t, filename)
 }
 
+func TestApiHasNoRequestBody(t *testing.T) {
+	filename := "greet.api"
+	err := ioutil.WriteFile(filename, []byte(apiHasNoRequest), os.ModePerm)
+	assert.Nil(t, err)
+	defer os.Remove(filename)
+
+	parser, err := parser.NewParser(filename)
+	assert.Nil(t, err)
+
+	_, err = parser.Parse()
+	assert.Nil(t, err)
+
+	validate(t, filename)
+}
+
 func validate(t *testing.T, api string) {
 	dir := "_go"
 	err := DoGenProject(api, dir, true)