package main

import "testing"

// 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)
		}
	}
}