split_client

defmodule SplitClient.Testing do
  @moduledoc """
  Functions to help with feature flag testing as well as
  making the concurrently running tests isolated and
  predictable
  """

  alias SplitClient.Boundary.DataSourceStub
  alias SplitClient.Sandbox
  import ExUnit.Callbacks

  @doc """
  Add `setup :setup_split_client` to the top of your
  test file. This will ensure that your Split.io
  treatments are isolated to your test and not
  inteferring with other tests running in parallel
  """
  def setup_split_client(context) do
    Sandbox.set_async_mode(context.async)

    test_pid = self()
    data_source_pid = start_supervised!(DataSourceStub)
    # Add yaml defaults
    DataSourceStub.create_splits(data_source_pid, [])
    Sandbox.setup_test_treatments(self(), data_source_pid)

    on_exit(fn ->
      Sandbox.teardown_test_treatments(test_pid)
    end)

    {:ok, context}
  end

  # Convience for just having own import
  defdelegate create_splits(splits), to: SplitClient.Sandbox
end