Is possible to run a test with LiveViewTest and Ecto asynchronously?

Phoenix Forum Questions / Help
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1

I’m adding some tests to my project with LiveViewTest and I’m inserting some data into the database that isn’t available when the LiveView is tested when using async: true.

I didn’t find anything in the documentation but it isn’t possible to run these tests asynchronously? Or I’m missing anything?

2

Can you show the code you’re running? Async tests should generally just work out of the box, even with live view.

3 
defmodule MyAppWeb.CrawlerLiveTest do
  use MyAppWeb.ConnCase
  import Phoenix.LiveViewTest

  describe "Index" do
    test "Connected mount", %{conn: conn} do
      user = insert(:user)

      {:ok, _view, html} =
        conn
        |> Plug.Test.init_test_session(user_id: user.id)
        |> live("/crawler")

      assert html =~ "Images of Crawler"
    end
  end
end

conn_case.ex

...
setup tags do
    MyApp.DataCase.setup_sandbox(tags)
    %{conn: Phoenix.ConnTest.build_conn()}
end

data_case.ex

def setup_sandbox(tags) do
    pid = Ecto.Adapters.SQL.Sandbox.start_owner!(@repo, shared: not tags[:async])

    on_exit(fn -> Ecto.Adapters.SQL.Sandbox.stop_owner(pid) end)
end

Inside the live view I check all the users available in the database and the new users isn’t there, so the test fails with async: true. Without this, it pass.

4

I found a way to do this

Probably not the best way but better than no way.

5

Alternatively, ensure you are using Sandbox in manual mode.

In test_helper.exs

Ecto.Adapters.SQL.Sandbox.mode(MyApp.Repo, :manual)