defmodule Scopes.CSysTest do
  use ExUnit.Case, async: false
  @moduletag timeout: 5000

  #alias Scopes.CSys
  alias Scopes.CSys.Environ
  alias Scopes.CSys.Program
  alias Scopes.Shape

  def receive_select(head) do
    assert_receive {^head, info}
    {head, info}
  end

  def receive_data(head \\ [:csys, :data]) do
    Shape.data(receive_select(head))
  end

  describe "basic-program:" do
    test "minimal-b1" do
      env = Environ.setup(Program.prepare_basic(), Program.init_seq_b1())
      Process.sleep(30)
      Environ.forward_value(env, [:csys, :c00, {0, 0}], 0)
      assert 0 = receive_data().value
      Environ.forward_value(env, [:csys, :s01, {1, 0}], 1)
      assert receive_data().value == 1
      #assert receive_data().value in [-1, 1]
      Environ.forward_value(env, [:csys, :s01, {1, 1}], 3)
      assert receive_data().value in [2, 3]
      assert receive_data().value in [2, 3]
      refute_received msg, "unhandled message(s): #{inspect(msg)}"
    end

    test "recursive-1" do
      env = Environ.setup(Program.prepare_basic(), Program.init_recursive_1())
      Process.sleep(30)
      Environ.forward_value(env, [:csys, :c00, {0, 0}], 42)
      assert receive_data().value == 42
      refute_received msg, "unhandled message(s): #{inspect(msg)}"
    end
  end
end