*/

package rand

import (
	"math/rand"
	"strings"
	"testing"
)

const (
	maxRangeTestCount = 500
	testStringLength  = 32
)

func TestString(t *testing.T) {
	valid := "bcdfghjklmnpqrstvwxz2456789"
	for _, l := range []int{0, 1, 2, 10, 123} {
		s := String(l)
		if len(s) != l {
			t.Errorf("expected string of size %d, got %q", l, s)
		}
		for _, c := range s {
			if !strings.ContainsRune(valid, c) {

	rng.Lock()
	defer rng.Unlock()
	return rng.rand.Perm(n)
}

const (
	// We omit vowels from the set of available characters to reduce the chances
	// of "bad words" being formed.
	alphanums = "bcdfghjklmnpqrstvwxz2456789"
	// No. of bits required to index into alphanums string.
	alphanumsIdxBits = 5
	// Mask used to extract last alphanumsIdxBits of an int.
	alphanumsIdxMask = 1<<alphanumsIdxBits - 1