package timeutil

import (
	"testing"
	"time"
)

func TestFormatAPITimeUsesBusinessTimezone(t *testing.T) {
	value := time.Date(2026, 7, 30, 9, 53, 58, 147355000, time.UTC)
	if got := FormatAPITime(value); got != "2026-07-30T17:53:58+08:00" {
		t.Fatalf("unexpected api time: %s", got)
	}
}

func TestStartOfDayUsesBusinessTimezone(t *testing.T) {
	value := time.Date(2026, 7, 30, 18, 30, 0, 0, time.UTC)
	got := StartOfDay(value)
	if got.Format(APITimeLayout) != "2026-07-31T00:00:00+08:00" {
		t.Fatalf("unexpected day start: %s", got.Format(APITimeLayout))
	}
}