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package randutil
import (
"bytes"
"crypto/rand"
"errors"
"regexp"
"testing"
"github.com/stretchr/testify/assert"
)
func TestErrors(t *testing.T) {
// with errors
df := forceErrorRandReader()
defer df()
str, err := UUIDv4()
assert.Error(t, err)
assert.Len(t, str, 0)
sizes := []int{4, 8, 16, 32}
for _, size := range sizes {
b, err := Salt(size)
assert.Error(t, err)
assert.Len(t, b, 0)
str, err = String(size, "0123456789")
assert.Error(t, err)
assert.Len(t, str, 0)
str, err = Hex(size)
assert.Error(t, err)
assert.Len(t, str, 0)
str, err = Alphanumeric(size)
assert.Error(t, err)
assert.Len(t, str, 0)
str, err = ASCII(size)
assert.Error(t, err)
assert.Len(t, str, 0)
str, err = Alphabet(size)
assert.Error(t, err)
assert.Len(t, str, 0)
}
}
func TestSalt(t *testing.T) {
sizes := []int{4, 8, 16, 32}
for _, size := range sizes {
a, err := Salt(size)
assert.NoError(t, err)
b, err := Salt(size)
assert.NoError(t, err)
// Most of the time
assert.NotEqual(t, a, b)
}
}
func TestBytes(t *testing.T) {
sizes := []int{4, 8, 16, 32, 64, 128}
for _, size := range sizes {
a, err := Bytes(size)
assert.NoError(t, err)
b, err := Bytes(size)
assert.NoError(t, err)
// Most of the time
assert.NotEqual(t, a, b)
}
}
func TestString(t *testing.T) {
re := regexp.MustCompilePOSIX(`^[0-9世界ñçàèìòù]+$`)
chars := "0123456789世界ñçàèìòù"
lengths := []int{4, 8, 16, 32}
for _, l := range lengths {
a, err := String(l, chars)
assert.True(t, re.MatchString(a))
assert.NoError(t, err)
b, err := String(l, chars)
assert.True(t, re.MatchString(b))
assert.NoError(t, err)
// Most of the time
assert.NotEqual(t, a, b)
}
}
func TestHex(t *testing.T) {
re := regexp.MustCompilePOSIX(`^[0-9a-f]+$`)
lengths := []int{4, 8, 16, 32}
for _, l := range lengths {
a, err := Hex(l)
assert.True(t, re.MatchString(a))
assert.NoError(t, err)
b, err := Hex(l)
assert.True(t, re.MatchString(b))
assert.NoError(t, err)
// Most of the time
assert.NotEqual(t, a, b)
}
}
func TestAlphanumeric(t *testing.T) {
re := regexp.MustCompilePOSIX(`^[0-9a-zA-Z]+$`)
lengths := []int{4, 8, 16, 32}
for _, l := range lengths {
a, err := Alphanumeric(l)
assert.True(t, re.MatchString(a))
assert.NoError(t, err)
b, err := Alphanumeric(l)
assert.True(t, re.MatchString(b))
assert.NoError(t, err)
// Most of the time
assert.NotEqual(t, a, b)
}
}
func TestASCII(t *testing.T) {
re := regexp.MustCompilePOSIX("^[\x21-\x7E]+$")
lengths := []int{4, 8, 16, 32}
for _, l := range lengths {
a, err := ASCII(l)
assert.True(t, re.MatchString(a))
assert.NoError(t, err)
b, err := ASCII(l)
assert.True(t, re.MatchString(b))
assert.NoError(t, err)
// Most of the time
assert.NotEqual(t, a, b)
}
}
func TestAlphabet(t *testing.T) {
re := regexp.MustCompilePOSIX(`^[a-zA-Z]+$`)
lengths := []int{4, 8, 16, 32}
for _, l := range lengths {
a, err := Alphabet(l)
assert.True(t, re.MatchString(a))
assert.NoError(t, err)
b, err := Alphabet(l)
assert.True(t, re.MatchString(b))
assert.NoError(t, err)
// Most of the time
assert.NotEqual(t, a, b)
}
}
func TestUUIDv4(t *testing.T) {
re := regexp.MustCompilePOSIX(`^[0-9a-f]{8}-[0-9a-f]{4}-[0-9a-f]{4}-[0-9a-f]{4}-[0-9a-f]{12}$`)
uuid, err := UUIDv4()
assert.NoError(t, err)
assert.Len(t, uuid, 36)
assert.True(t, re.MatchString(uuid))
b := make([]byte, 32)
copy(b[16:], []byte{1, 2, 3, 4, 5, 6, 7, 8, 9, 0, 1, 2, 3, 4, 5, 6})
df := forceByteReader(b)
defer df()
tests := []struct {
name string
want string
wantErr bool
}{
{"ok", "00000000-0000-4000-8000-000000000000", false},
{"ok", "01020304-0506-4708-8900-010203040506", false},
{"fail", "", true},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
got, err := UUIDv4()
if (err != nil) != tt.wantErr {
t.Errorf("UUIDv4() error = %v, wantErr %v", err, tt.wantErr)
return
}
if got != tt.want {
t.Errorf("UUIDv4() = %v, want %v", got, tt.want)
}
})
}
}
type errorReader struct{}
func (r *errorReader) Read(p []byte) (int, error) {
return 0, errors.New("an error")
}
func forceErrorRandReader() func() {
old := rand.Reader
rand.Reader = new(errorReader)
return func() {
rand.Reader = old
}
}
func forceByteReader(b []byte) func() {
old := rand.Reader
rand.Reader = bytes.NewReader(b)
return func() {
rand.Reader = old
}
}
|
