eighth version

internal/marketdata/loader_test.go

@@ -0,0 +1,43 @@
+package marketdata
+
+import (
+	"context"
+	"strings"
+	"testing"
+	"time"
+
+	"github.com/shopspring/decimal"
+
+	"overnight-trading-bot/internal/domain"
+	"overnight-trading-bot/internal/tinvest"
+)
+
+type fixedClock struct {
+	now time.Time
+}
+
+func (c fixedClock) Now() time.Time {
+	return c.now
+}
+
+func (c fixedClock) Sleep(<-chan struct{}, time.Duration) bool {
+	return true
+}
+
+func TestLatestQuoteUsesExchangeTimestampForFreshness(t *testing.T) {
+	now := time.Date(2026, 6, 8, 18, 20, 0, 0, time.UTC)
+	gateway := tinvest.NewFakeGateway()
+	gateway.OrderBooks["uid"] = domain.OrderBook{
+		InstrumentUID: "uid",
+		Time:          now.Add(-2 * time.Second),
+		ReceivedAt:    now,
+		Bids:          []domain.OrderBookLevel{{Price: decimal.NewFromInt(99), QuantityLots: 10}},
+		Asks:          []domain.OrderBookLevel{{Price: decimal.NewFromInt(101), QuantityLots: 10}},
+	}
+	loader := NewLoader(nil, gateway)
+	loader.SetClock(fixedClock{now: now})
+	_, err := loader.LatestQuote(context.Background(), "uid", 20, time.Second)
+	if err == nil || !strings.Contains(err.Error(), "quote age") {
+		t.Fatalf("LatestQuote err=%v, want stale exchange timestamp rejection", err)
+	}
+}