Add bot to play against.

internal/server/bot_e2e_test.go

@@ -0,0 +1,83 @@
+package server
+
+import (
+	"bytes"
+	"context"
+	"encoding/json"
+	"net/http"
+	"net/http/httptest"
+	"strings"
+	"testing"
+	"time"
+
+	"github.com/coder/websocket"
+
+	"github.com/greyson/super-auto-pets-board-game/internal/game"
+	"github.com/greyson/super-auto-pets-board-game/internal/store"
+)
+
+// TestE2EBotGame creates a vs-computer game over the API, plays the human's
+// shop turns over the wire, and verifies the scheduled bot actually takes
+// its own turns (spends coins) without any second client connected.
+func TestE2EBotGame(t *testing.T) {
+	st, err := store.Open(t.TempDir())
+	if err != nil {
+		t.Fatal(err)
+	}
+	defer st.Close()
+	srv := New(st, "", false)
+	ts := httptest.NewServer(srv.Handler())
+	defer ts.Close()
+
+	ctx, cancel := context.WithTimeout(context.Background(), 30*time.Second)
+	defer cancel()
+
+	resp, err := http.Post(ts.URL+"/api/games", "application/json",
+		bytes.NewBufferString(`{"name":"Human","bot":"easy"}`))
+	if err != nil {
+		t.Fatal(err)
+	}
+	var join joinResponse
+	if err := json.NewDecoder(resp.Body).Decode(&join); err != nil {
+		t.Fatal(err)
+	}
+	resp.Body.Close()
+
+	wsBase := "ws" + strings.TrimPrefix(ts.URL, "http")
+	ws, _, err := websocket.Dial(ctx,
+		wsBase+"/api/ws?game="+join.GameID+"&player="+join.PlayerID+"&token="+join.Token, nil)
+	if err != nil {
+		t.Fatal(err)
+	}
+	defer ws.Close(websocket.StatusNormalClosure, "")
+
+	v := readState(t, ctx, ws)
+	if v.Phase != game.PhaseShop {
+		t.Fatalf("phase = %s, want shop (bot fills the lobby instantly)", v.Phase)
+	}
+	var bot *game.PlayerView
+	for i := range v.Players {
+		if v.Players[i].IsBot {
+			bot = &v.Players[i]
+		}
+	}
+	if bot == nil {
+		t.Fatal("no bot seat in the game")
+	}
+
+	// Play the human side: pass whenever it's our turn. The game can only
+	// reach the arrange phase if the bot spends its own three coins too.
+	deadline := time.Now().Add(25 * time.Second)
+	for v.Phase == game.PhaseShop && time.Now().Before(deadline) {
+		if v.Turn == v.YouSeat && v.Players[v.YouSeat].Coins > 0 && v.Pending == nil {
+			send(t, ctx, ws, map[string]any{"type": "pass"})
+		}
+		rctx, rcancel := context.WithTimeout(ctx, 10*time.Second)
+		v = readState(t, rctx, ws)
+		rcancel()
+	}
+	if v.Phase == game.PhaseShop {
+		t.Fatalf("shop never ended; bot coins=%d", v.Players[bot.Seat].Coins)
+	}
+	t.Logf("reached phase %s; bot played its shop turns", v.Phase)
+}