eighth version

internal/repository/mysql/rows_test.go

@@ -0,0 +1,27 @@
+package mysql
+
+import (
+	"testing"
+	"time"
+
+	"github.com/shopspring/decimal"
+
+	"overnight-trading-bot/internal/domain"
+)
+
+func TestMinuteCandleRowPreservesTimestamp(t *testing.T) {
+	ts := time.Date(2026, 6, 8, 15, 25, 30, 123000000, time.UTC)
+	row := minuteCandleRowFromDomain(domain.Candle{
+		InstrumentUID: "uid",
+		TradeDate:     ts,
+		Open:          decimal.NewFromInt(1),
+	})
+	if !row.TradeDate.Equal(ts) {
+		t.Fatalf("minute timestamp=%s, want %s", row.TradeDate, ts)
+	}
+
+	daily := candleRowFromDomain(domain.Candle{InstrumentUID: "uid", TradeDate: ts})
+	if daily.TradeDate.Equal(ts) || daily.TradeDate.Hour() != 0 || daily.TradeDate.Minute() != 0 {
+		t.Fatalf("daily timestamp was not truncated to date: %s", daily.TradeDate)
+	}
+}