Add tests for GameCoordinator

apps/amethyst/test/game_coordinator_test.exs

@@ -0,0 +1,43 @@
+defmodule GameCoordinatorTestGame do
+  use Amethyst.API.Game
+
+  @moduledoc """
+  This module is a sample game for the purpose of
+  testing the GameCoordinator
+  """
+
+  @impl true
+  def instantiate() do
+    {:ok, :example_state}
+  end
+
+  @impl true
+  def login(_connection_process, _player_cfg, state) do
+    {:ok, state}
+  end
+end
+
+defmodule GameCoordinatorTest do
+  use ExUnit.Case, async: true
+
+  @moduledoc """
+  This module includes tests for Amethyst.GameCoordinator
+  """
+
+  test "Create an instance of a game with create/1 then kill it" do
+    pid = Amethyst.GameCoordinator.create(GameCoordinatorTestGame)
+    assert Process.alive?(pid)
+    assert Amethyst.GameCoordinator.find(GameCoordinatorTestGame) == pid
+    Process.exit(pid, :kill)
+    assert Amethyst.GameCoordinator.find(GameCoordinatorTestGame) == nil
+  end
+
+  test "Create new instance with find_or_create/1 if one doesn't exist, otherwise use it" do
+    pid = Amethyst.GameCoordinator.find_or_create(GameCoordinatorTestGame)
+    assert Process.alive?(pid)
+    assert Amethyst.GameCoordinator.find_or_create(GameCoordinatorTestGame) == pid
+    Process.exit(pid, :kill)
+    assert Amethyst.GameCoordinator.find_or_create(GameCoordinatorTestGame) != pid
+    Amethyst.GameCoordinator.find(GameCoordinatorTestGame) |> Process.exit(:kill)
+  end
+end