| 9 | ) |
| 10 | |
| 11 | func TestRandomElement(t *testing.T) { |
| 12 | t.Parallel() |
| 13 | |
| 14 | t.Run("Empty", func(t *testing.T) { |
| 15 | t.Parallel() |
| 16 | |
| 17 | s := []string{} |
| 18 | v, err := cryptorand.Element(s) |
| 19 | require.Error(t, err) |
| 20 | require.ErrorContains(t, err, "slice must have at least one element") |
| 21 | require.Empty(t, v) |
| 22 | }) |
| 23 | |
| 24 | t.Run("OK", func(t *testing.T) { |
| 25 | t.Parallel() |
| 26 | |
| 27 | // Generate random slices of ints and strings |
| 28 | var ( |
| 29 | ints = make([]int, 20) |
| 30 | strings = make([]string, 20) |
| 31 | ) |
| 32 | for i := range ints { |
| 33 | v, err := cryptorand.Intn(1024) |
| 34 | require.NoError(t, err, "generate random int for test slice") |
| 35 | ints[i] = v |
| 36 | } |
| 37 | for i := range strings { |
| 38 | v, err := cryptorand.String(10) |
| 39 | require.NoError(t, err, "generate random string for test slice") |
| 40 | strings[i] = v |
| 41 | } |
| 42 | |
| 43 | // Get a random value from each 20 times. |
| 44 | for i := 0; i < 20; i++ { |
| 45 | iv, err := cryptorand.Element(ints) |
| 46 | require.NoError(t, err, "unexpected error from Element(ints)") |
| 47 | t.Logf("random int slice element: %v", iv) |
| 48 | require.Contains(t, ints, iv) |
| 49 | |
| 50 | sv, err := cryptorand.Element(strings) |
| 51 | require.NoError(t, err, "unexpected error from Element(strings)") |
| 52 | t.Logf("random string slice element: %v", sv) |
| 53 | require.Contains(t, strings, sv) |
| 54 | } |
| 55 | }) |
| 56 | } |