Phoenix: How to get conn %Plug.Conn{} in the console

Question

After

iex -S mix phx.server

I want to do some quick tests in the iex terminal, but some functions require the struct %Plug.Conn{} as an argument, for example I wanted to get the result of expression:

MyAppWeb.Router.Helpers.confirmation_url(%Plug.Conn{}, :edit, "12345")

But I've got error:

Phoenix endpoint not found in %{}

Is there a simple way of getting conn struct in the console?

Answer 1

Router helper functions accept either a conn or an endpoint module as the first argument. You can pass the endpoint module of your app when you want to generate a URL without a conn:

MyAppWeb.Router.Helpers.confirmation_url(MyAppWeb.Endpoint, :edit, "12345")

Edit: If you want to create a dummy conn that works with Router helpers, it seems like it's enough to put a %{phoenix_endpoint: MyAppWeb.Endpoint} value in conn.private as of Phoenix 1.3:

conn = %Plug.Conn{private: %{phoenix_endpoint: MyAppWeb.Endpoint}}
MyAppWeb.Router.Helpers.confirmation_url(conn, :edit, "12345")

Answer 2

The ConnCase test helpers use Phoenix.ConnTest.build_conn() to bootstrap a connection struct for the controller tests.

You can find the function here and either use it directly or follow its implementation and tweak it as you like.