🐛 [Bug]: Naming of routes works wrong

[Antonov-guap]

Bug Description

Naming of routes with the same path and different methods works wrong. All routes with the same path are replaced with new given name.

How to Reproduce

Steps to reproduce the behavior:

1. Create new app:

   app := fiber.New()
   app.Get("/users", nil).Name("get-users")
   app.Post("/users", nil).Name("add-user")

2. Try to get route by name:

   c := app.AcquireCtx(&fasthttp.RequestCtx{})
   defer app.ReleaseCtx(c)
   location, err := c.GetRouteURL("get-users", fiber.Map{})

3. Check the result:

   fmt.Println("location:", location)
   fmt.Println("err:", err)

4. Actual result:

   location: 
   err: <nil>

Expected Behavior

Expected that path will be "/users" with no error:

location: /users
err: <nil>

Fiber Version

v2.50.0

Code Snippet (optional)

package main

import (
    "fmt"

    "github.com/gofiber/fiber/v2"
    "github.com/valyala/fasthttp"
)

func main() {
    app := fiber.New()
    app.Get("/users", nil).Name("get-users")
    app.Post("/users", nil).Name("add-user")

    c := app.AcquireCtx(&fasthttp.RequestCtx{})
    defer app.ReleaseCtx(c)
    location, err := c.GetRouteURL("get-users", fiber.Map{})

    fmt.Println("location:", location)
    fmt.Println("err:", err)

    getUsers := app.GetRoute("get-users")
    addUser := app.GetRoute("add-user")

    fmt.Println("get-users:", getUsers.Method, getUsers.Path)
    fmt.Println("add-user:", addUser.Method, addUser.Path)
}

// Output: 
// location: 
// err: <nil>
// get-users:  
// add-user: GET /users

Checklist:

• [X] I agree to follow Fiber's Code of Conduct.
• [X] I have checked for existing issues that describe my problem prior to opening this one.
• [X] I understand that improperly formatted bug reports may be closed without explanation.

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[trapcodeio]

I think this is related to #2671

[Antonov-guap]

yes, related, but issue https://github.com/gofiber/fiber/issues/2671 has test (i saw it). And this test is also has problems. It adds some name, after it asserts, then again add name -> assert. But if you add all the names before, and then assert all, you will get unpredictable result, cos name adding affect all names previously added.

[Antonov-guap]

and also, I didn't make an issue, but when you mount app as subApp, then mount also drops names of routes (when listen started).