package main

import (
	"strings"
	"testing"
	"time"
)

// "когда я это сделал?" answers off a fact's Ts, which the store hands back as
// UTC, and the branch that names a wall clock printed it in whatever zone it
// arrived in (V-614). The instant here is built three hours off this machine's
// zone, so the assertion holds under TZ=UTC as well.
func TestFormatTimeReadsHisClock(t *testing.T) {
	_, off := time.Now().Zone()
	away := time.FixedZone("away", off+3*60*60)
	stored := time.Now().Add(-72 * time.Hour).In(away)

	got := formatTime(stored)
	if want := stored.Local().Format("15:04"); !strings.Contains(got, want) {
		t.Errorf("formatTime = %q, want the hour on his clock (%s)", got, want)
	}
	if bad := stored.Format("15:04"); strings.Contains(got, bad) {
		t.Errorf("formatTime = %q reads the zone the fact arrived in (%s)", got, bad)
	}
}

// TestMentionsUnknownDayReadsWordsNotStems — the defect V-581 found. The
// weekday half of this guard was a list of stems matched with strings.Contains,
// so "среди", "средство" and "средний" all read as Wednesday and the question
// was answered with onlyNearDaysReply instead of a date.
//
// The other half of the fix is coverage: a stem list stops at the forms whoever
// wrote it thought of, and "воскресеньях" was not one of them.
func TestMentionsUnknownDayReadsWordsNotStems(t *testing.T) {
	for _, u := range []string{
		"какое число в понедельник",
		"какое число в среду",
		"какое число в среде",
		"что там по воскресеньям",
		"what is the date on friday",
		"какое число через неделю",
	} {
		if !mentionsUnknownDay(u) {
			t.Errorf("mentionsUnknownDay(%q) = false, want true", u)
		}
	}
	for _, u := range []string{
		"какое число в среднем",
		"сколько это в среднем",
		"какое сегодня средство",
		"какое число",
	} {
		if mentionsUnknownDay(u) {
			t.Errorf("mentionsUnknownDay(%q) = true; it names no day", u)
		}
	}
}