Phoenix控制器测试,设置请求主机

Question

我正在制作一个多站点应用程序.我想在测试控制器之前在连接上设置请求主机.在Rails中我们可以使用

before :each do
  request.env["HTTP_REFERER"] = '/'
end

有人可以建议如何在凤凰城做同样的事情吗？

编辑1:我可以使用设置主机 conn |> put_req_header("host", "abc.com"),但这不会更改对象host中的conn属性.它仍然指向"www.example.com"

编辑2:我也试过了

test "creates resource and redirects when data is valid", %{conn: _conn} do
  struct_url = %{Myapp.Endpoint.struct_url | host: "abc.com"}
  conn = post(conn, registration_url(struct_url, :create, user: @valid_attrs))
  assert redirected_to(conn) == "/"
end

但我收到以下错误:

$ mix test test/controllers/registration_controller_test.exs                                                                                 1) test creates resource and redirects when data is valid (Myapp.RegistrationControllerTest)
     test/controllers/registration_controller_test.exs:14
     ** (RuntimeError) expected action/2 to return a Plug.Conn, all plugs must receive a connection (conn) and return a connection
     stacktrace:
       (myapp) web/controllers/registration_controller.ex:1: Myapp.RegistrationController.phoenix_controller_pipeline/2
       (myapp) lib/phoenix/router.ex:255: Myapp.Router.dispatch/2
       (myapp) web/router.ex:1: Myapp.Router.do_call/2
       (myapp) lib/myapp/endpoint.ex:1: Myapp.Endpoint.phoenix_pipeline/1
       (myapp) lib/phoenix/endpoint/render_errors.ex:34: Myapp.Endpoint.call/2
       (phoenix) lib/phoenix/test/conn_test.ex:193: Phoenix.ConnTest.dispatch/5
       test/controllers/registration_controller_test.exs:16

registration_controller.ex第1行是 defmodule Myapp.RegistrationControllerTest do

编辑3:创建动作registration_controller.ex

  def create(conn, %{"user" => user_params}) do
    user_changeset = User.changeset(%User{}, user_params)
    if user_changeset.valid? do
      Repo.transaction fn ->
        user = Repo.insert!(user_changeset)
        user_site = Ecto.Model.build(user, :user_sites, site: site_id(conn))
        Repo.insert!(user_site)

        conn
          |> put_flash(:info, "Your account was created")
          |> put_session(:current_user, user)
          |> redirect(to: "/")
      end
    else
      conn
        |> render("new.html", changeset: user_changeset)
    end
  end

Answer 1

由于Plug.Conn是结构,如果需要更改主机,可以使用地图更新语法:

conn = %{conn | host: "abc.com"}

如果要更改管道中的键,请使用Map.put/3:

conn =
  conn()
  |> put_header("content-type", "json")
  |> Map.put(:host, "abc.com")

如果您希望在每次测试之前运行某些东西,可以使用ExUnit.Callbacks.setup/2

setup do
  conn = %{conn() | host: "abc.com"}
  {:ok, conn}
end

test "foo", %{conn: conn} do
  get(conn, ...)
end

编辑

如果你看一下https://github.com/elixir-lang/plug/blob/3835473fcf3a554a616d1bbcd2639aa63893be2c/lib/plug/adapters/test/conn.ex#L7

您将看到主机由以下因素决定:

host: uri.host || "www.example.com"

这是在凤凰城调用的https://github.com/phoenixframework/phoenix/blob/b9ebbc2b9241b59dcac5d9c6d66fa248efe68a9c/lib/phoenix/test/conn_test.ex#L200

这意味着,为了获得所需的主机,您需要在URL中指定它,而不是 conn

试试这个:

struct_url = %{MyApp.Endpoint.struct_url | host: "abc.com"}
conn = get(conn, foo_url(struct_url, :index)) #note foo_url not foo_path

EDIT2

这里的问题是:

 Repo.transaction fn ->
    user = Repo.insert!(user_changeset)
    user_site = Ecto.Model.build(user, :user_sites, site: site_id(conn))
    Repo.insert!(user_site)

    conn
      |> put_flash(:info, "Your account was created")
      |> put_session(:current_user, user)
      |> redirect(to: "/")
  end

错误告诉你action/2应该返回一个Plug.Conn但是你要返回事务/ 3的结果(它将是{:ok, value}或者{error, value}

这意味着您的功能将返回 {:ok, conn}

尝试:

 Repo.transaction fn ->
    user = Repo.insert!(user_changeset)
    user_site = Ecto.Model.build(user, :user_sites, site: site_id(conn))
    Repo.insert!(user_site)
  end

  conn
  |> put_flash(:info, "Your account was created")
  |> put_session(:current_user, user)
  |> redirect(to: "/")

如果你想根据事务返回不同的结果,那么我会将整个部分移动到类似的模块函数AccountService.create,然后使用case语句,如:

def create(conn, %{"user" => user_params}) do
  case MessageService.create(user_params) do
    {:ok, user} ->
      |> put_flash(:info, "Your account was created")
      |> put_session(:current_user, user)
      |> redirect(to: "/")
    {:error, changeset} ->
      conn
      |> render("new.html", changeset: user_changeset)
  end
end