package clock

import (
	"testing"
	"time"
)

func TestInstantRoundTripUsesUTCUnixMilliseconds(t *testing.T) {
	want := time.Date(2026, time.August, 29, 12, 34, 56, 789000000, time.FixedZone("local", 3*60*60))
	got := FromTime(want).Time()
	if !got.Equal(want.UTC()) || got.Location() != time.UTC {
		t.Fatalf("instant round trip = %v, want %v UTC", got, want.UTC())
	}
}