👷 fix group.Mount

app_test.go

@@ -736,6 +736,22 @@ func Test_App_Group_Invalid(t *testing.T) {
 	New().Group("/").Use(1)
 }
 
+// go test -run Test_App_Group_Mount
+func Test_App_Group_Mount(t *testing.T) {
+	micro := New()
+	micro.Get("/doe", func(c *Ctx) error {
+		return c.SendStatus(StatusOK)
+	})
+
+	app := New()
+	v1 := app.Group("/v1")
+	v1.Mount("/john", micro)
+
+	resp, err := app.Test(httptest.NewRequest("GET", "/v1/john/doe", nil))
+	utils.AssertEqual(t, nil, err, "app.Test(req)")
+	utils.AssertEqual(t, 200, resp.StatusCode, "Status code")
+}
+
 func Test_App_Group(t *testing.T) {
 	var dummyHandler = testEmptyHandler
 

group.go

@@ -23,7 +23,7 @@ func (grp *Group) Mount(prefix string, fiber *App) Router {
 	for m := range stack {
 		for r := range stack[m] {
 			route := grp.app.copyRoute(stack[m][r])
-			grp.app.addRoute(route.Method, grp.app.addPrefixToRoute(prefix, route))
+			grp.app.addRoute(route.Method, grp.app.addPrefixToRoute(getGroupPath(grp.prefix, prefix), route))
 		}
 	}
 	return grp