Hi all,

I think I’ll feel silly when this problem will be pinned down.

The tests on my application are suddenly not working anymore. Same commit, same CI run. I can’t find what changed.

The actual error:

 ** (FunctionClauseError) no function clause matching in Access.get/3

This comes from my test file, actually, I want to invoke the get/3 macro from WsdataselectWeb.ConnCase. So nothing fancy, just the classic Phoenix way to test a GET request.

It is like if Elixir lost track of the Wsdataselect.ConnCase module and maps the get instruction to the Access module.

Anyone can help me understand what’s going wrong ?

This is one test file where the problem occurs: Blame · test/permissions_test.exs · phnx · OSUG / RESIF / wsdataselect · GitLab

defmodule PermissionsTest do
    use WsdataselectWeb.ConnCase, async: false

    test "User tries to read forbidden network", %{conn: conn} do
      conn =
        conn
        |> get(~p"/query?net=FR&sta=CIEL")

      assert conn.assigns.forbidden_networks == ["FR"]
      assert conn.assigns.datafiles == []
    end
end

Full output of the test:

1. test Permissions test User tries to read forbidden network (PermissionsTest)
   test/permissions_test.exs:166
   ** (FunctionClauseError) no function clause matching in Access.get/3

   The following arguments were given to Access.get/3:

   # 1
   :ok
   
   # 2
   "countryCode"
   
   # 3
   nil
   

   Attempted function clauses (showing 6 out of 6):

   def get(%module{} = container, key, default)
   def get(map, key, default) when is_map(map)
   def get(list, key, default) when is_list(list) and is_atom(key)
   def get(list, key, _default) when is_list(list) and is_integer(key)
   def get(list, key, _default) when is_list(list)
   def get(nil, _key, default)
   

   code: |> get(~p"/query?net=FR&sta=CIEL")
   stacktrace:
   (elixir 1.19.4) lib/access.ex:324: Access.get/3
   (wsdataselect 0.9.0) lib/delivery_metrics/delivery_metrics.ex:28: DeliveryMetrics.compute/1
   (wsdataselect 0.9.0) lib/wsdataselect_web/controllers/query_controller.ex:1: WsdataselectWeb.QueryController.action/2
   (wsdataselect 0.9.0) lib/wsdataselect_web/controllers/query_controller.ex:1: WsdataselectWeb.QueryController.phoenix_controller_pipeline/2
   (phoenix 1.8.1) lib/phoenix/router.ex:416: Phoenix.Router.call/5
   (wsdataselect 0.9.0) lib/wsdataselect_web/endpoint.ex:1: WsdataselectWeb.Endpoint.plug_builder_call/2
   (wsdataselect 0.9.0) lib/wsdataselect_web/endpoint.ex:1: WsdataselectWeb.Endpoint.call/2
   (phoenix 1.8.1) lib/phoenix/test/conn_test.ex:225: Phoenix.ConnTest.dispatch/5
   test/permissions_test.exs:171: (test)

And there is the successful test CI run (6d ago) : test (#861557) · Jobs · OSUG / RESIF / wsdataselect · GitLab

And here the failing test CI run: test (#865942) · Jobs · OSUG / RESIF / wsdataselect · GitLab

I tried to change the elixir/otp versions but have the same result.

I must also add that I can reproduce the problem locally on my laptop.