Hey guys,

I’m relatively new to Elixir world. Currently I’m working on a GraphQL API with Absinthe. All is going right, I have done some logic, some tests to the business logic layer, etc.

Now I’m trying to test my web layer (resolvers), but every time I’m stuck getting this response every time I try to make a request from ExUnit.

%{
  "errors" => [
    %{
      "locations" => [%{"column" => 1, "line" => 1}],
      "message" => "Parsing failed at `--plug_con`"
    }
  ]
}

The app works just fine from Postman, here it’s my test file

defmodule Test.Web.Resolver.Session do
  alias Mix.Tasks.Phx.Routes
  use Test.Setup.ConnCase, async: true

  @login_mutation """
  query GetUser($id: ID!){
    user(id: $id) {
        id,
        email,
        firstName,
        posts {
            id,
            title
        }
    }
  }
  """

  setup %{conn: conn} do
    :ok
  end

  test "prueba", %{conn: conn} do
    conn =
      post(conn, "/api/graphql", %{
        "mutation" => @login_mutation,
        "variables" => %{id: 1}
      })

    IO.inspect(conn)
    IO.inspect(json_response(conn, 200))
  end
end

Any idea why is this happening?