Boards need a king on both sides

lib/chess/game_state.ex

@@ -38,6 +38,10 @@ defmodule Chess.GameState do
       |> Board.search(%{"type" => "king", "colour" => colour})
       |> List.first
 
+    if king == nil do
+      raise "There is no #{colour} king!"
+    end
+
     board
     |> Piece.attacked?(king)
   end

lib/chess_web/controllers/page_controller.ex

@@ -3,7 +3,13 @@ defmodule ChessWeb.PageController do
 
   use ChessWeb, :controller
 
+  import Chess.Auth, only: [current_user: 1]
+
   def index(conn, _params) do
+    if current_user(conn) != nil do
+      conn |> redirect(to: game_path(conn, :index)) |> halt()
+    else
       render(conn, "index.html")
     end
+  end
 end

test/features/games_test.exs

@@ -29,7 +29,7 @@ defmodule Chess.Features.GamesTest do
     |> click(button("Create game"))
 
     session
-    |> assert_has(css("h2", text: "Game with Zelda"))
+    |> assert_has(css("p", text: "Playing Zelda"))
     |> assert_has(css(".board"))
   end
 
@@ -65,7 +65,7 @@ defmodule Chess.Features.GamesTest do
     |> click(link("New game"))
     |> select("game[opponent_id]", option: "Urbosa")
     |> click(button("Create game"))
-    |> click(link("Back to games"))
+    |> click(link("Chess"))
 
     session
     |> assert_has(css(".table tr", count: 1))
@@ -96,6 +96,6 @@ defmodule Chess.Features.GamesTest do
     |> click(link("Game with Zelda"))
 
     session
-    |> assert_has(css("h2", text: "Game with Zelda"))
+    |> assert_has(css("p", text: "Playing Zelda"))
   end
 end

test/features/moves_test.exs

@@ -130,6 +130,7 @@ defmodule Chess.Features.MovesTest do
       board: %{
         "4,0" => %{"type" => "king",   "colour" => "white"},
         "3,7" => %{"type" => "queen",  "colour" => "black"},
+        "7,7" => %{"type" => "king",  "colour" => "black"},
       },
       user_id: user.id,
       opponent_id: opponent.id,
@@ -165,6 +166,7 @@ defmodule Chess.Features.MovesTest do
         "4,0" => %{"type" => "king", "colour" => "white"},
         "4,1" => %{"type" => "rook", "colour" => "white"},
         "4,7" => %{"type" => "queen", "colour" => "black"},
+        "7,7" => %{"type" => "king",  "colour" => "black"},
       },
       user_id: user.id,
       opponent_id: opponent.id,