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package random
import (
"math/rand"
"testing"
"github.com/stretchr/testify/assert"
"github.com/stretchr/testify/require"
)
func TestStringLength(t *testing.T) {
for i := 0; i < 100; i++ {
s := String(i)
assert.Equal(t, i, len(s))
}
}
func TestStringDuplicates(t *testing.T) {
seen := map[string]bool{}
for i := 0; i < 100; i++ {
s := String(8)
assert.False(t, seen[s])
assert.Equal(t, 8, len(s))
seen[s] = true
}
}
func TestPasswordLength(t *testing.T) {
for i := 0; i <= 128; i++ {
s, err := Password(i)
require.NoError(t, err)
// expected length is number of bytes rounded up
expected := i / 8
if i%8 != 0 {
expected++
}
// then converted to base 64
expected = (expected*8 + 5) / 6
assert.Equal(t, expected, len(s), i)
}
}
func TestPasswordDuplicates(t *testing.T) {
seen := map[string]bool{}
for i := 0; i < 100; i++ {
s, err := Password(64)
require.NoError(t, err)
assert.False(t, seen[s])
seen[s] = true
}
}
func TestSeed(t *testing.T) {
// seed 100 times and check the first random number doesn't repeat
// This test could fail with a probability of ~ 10**-15
const n = 100
var seen = map[int64]bool{}
for i := 0; i < n; i++ {
assert.NoError(t, Seed())
first := rand.Int63()
assert.False(t, seen[first])
seen[first] = true
}
}
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