lottery_test.gno

 1package lottery
 2
 3import (
 4	"testing"
 5
 6	"gno.land/p/nt/uassert/v0"
 7)
 8
 9func TestPickIndex(t *testing.T) {
10	cases := []struct {
11		height int64
12		n      int
13		want   int
14	}{
15		{0, 3, 0},
16		{1, 3, 1},
17		{2, 3, 2},
18		{3, 3, 0},
19		{10, 4, 2},
20		{100, 7, 2},
21		{5, 1, 0},
22	}
23	for _, tc := range cases {
24		got := pickIndex(tc.height, tc.n)
25		uassert.Equal(t, tc.want, got)
26		if got < 0 || got >= tc.n {
27			t.Errorf("index %d out of range for n=%d", got, tc.n)
28		}
29	}
30}
31
32func TestWinnerKey(t *testing.T) {
33	cases := []struct {
34		round int
35		want  string
36	}{
37		{1, "000000001"},
38		{42, "000000042"},
39		{1000, "000001000"},
40		{123456789, "123456789"},
41	}
42	for _, tc := range cases {
43		uassert.Equal(t, tc.want, winnerKey(tc.round))
44	}
45	// Zero-padding must preserve chronological ordering under string compare.
46	uassert.True(t, winnerKey(2) > winnerKey(1))
47	uassert.True(t, winnerKey(10) > winnerKey(9))
48	uassert.True(t, winnerKey(100) > winnerKey(99))
49}