mirror of
https://github.com/rclone/rclone
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f0905499e3
This shouldn't be read as encouraging the use of math/rand instead of crypto/rand in security sensitive contexts, rather as a safer default if that does happen by accident.
65 lines
1.3 KiB
Go
65 lines
1.3 KiB
Go
package random
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import (
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"math/rand"
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"testing"
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"github.com/stretchr/testify/assert"
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"github.com/stretchr/testify/require"
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)
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func TestStringLength(t *testing.T) {
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for i := 0; i < 100; i++ {
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s := String(i)
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assert.Equal(t, i, len(s))
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}
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}
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func TestStringDuplicates(t *testing.T) {
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seen := map[string]bool{}
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for i := 0; i < 100; i++ {
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s := String(8)
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assert.False(t, seen[s])
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assert.Equal(t, 8, len(s))
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seen[s] = true
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}
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}
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func TestPasswordLength(t *testing.T) {
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for i := 0; i <= 128; i++ {
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s, err := Password(i)
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require.NoError(t, err)
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// expected length is number of bytes rounded up
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expected := i / 8
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if i%8 != 0 {
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expected++
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}
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// then converted to base 64
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expected = (expected*8 + 5) / 6
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assert.Equal(t, expected, len(s), i)
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}
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}
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func TestPasswordDuplicates(t *testing.T) {
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seen := map[string]bool{}
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for i := 0; i < 100; i++ {
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s, err := Password(64)
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require.NoError(t, err)
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assert.False(t, seen[s])
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seen[s] = true
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}
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}
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func TestSeed(t *testing.T) {
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// seed 100 times and check the first random number doesn't repeat
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// This test could fail with a probability of ~ 10**-15
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const n = 100
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var seen = map[int64]bool{}
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for i := 0; i < n; i++ {
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assert.NoError(t, Seed())
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first := rand.Int63()
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assert.False(t, seen[first])
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seen[first] = true
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}
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}
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