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|
package password
import (
"errors"
"io"
"strings"
"sync/atomic"
"testing"
)
type (
MockReader struct {
Counter int64
}
)
const (
N = 10000
)
func (mr *MockReader) Read(data []byte) (int, error) {
for i := 0; i < len(data); i++ {
data[i] = byte(atomic.AddInt64(&mr.Counter, 1))
}
return len(data), nil
}
func testHasDuplicates(tb testing.TB, s string) bool {
tb.Helper()
found := make(map[rune]struct{}, len(s))
for _, ch := range s {
if _, ok := found[ch]; ok {
return true
}
found[ch] = struct{}{}
}
return false
}
func testGeneratorGenerate(t *testing.T, reader io.Reader) {
t.Helper()
gen, err := NewGenerator(nil)
if reader != nil {
gen.reader = reader
}
if err != nil {
t.Fatal(err)
}
t.Run("exceeds_length", func(t *testing.T) {
t.Parallel()
if _, err := gen.Generate(0, 1, 0, false, false); !errors.Is(err, ErrExceedsTotalLength) {
t.Errorf("expected %q to be %q", err, ErrExceedsTotalLength)
}
if _, err := gen.Generate(0, 0, 1, false, false); !errors.Is(err, ErrExceedsTotalLength) {
t.Errorf("expected %q to be %q", err, ErrExceedsTotalLength)
}
})
t.Run("exceeds_letters_available", func(t *testing.T) {
t.Parallel()
if _, err := gen.Generate(1000, 0, 0, false, false); !errors.Is(err, ErrLettersExceedsAvailable) {
t.Errorf("expected %q to be %q", err, ErrLettersExceedsAvailable)
}
})
t.Run("exceeds_digits_available", func(t *testing.T) {
t.Parallel()
if _, err := gen.Generate(52, 11, 0, false, false); !errors.Is(err, ErrDigitsExceedsAvailable) {
t.Errorf("expected %q to be %q", err, ErrDigitsExceedsAvailable)
}
})
t.Run("exceeds_symbols_available", func(t *testing.T) {
t.Parallel()
if _, err := gen.Generate(52, 0, 31, false, false); !errors.Is(err, ErrSymbolsExceedsAvailable) {
t.Errorf("expected %q to be %q", err, ErrSymbolsExceedsAvailable)
}
})
t.Run("gen_lowercase", func(t *testing.T) {
t.Parallel()
for i := 0; i < N; i++ {
res, err := gen.Generate(i%len(LowerLetters), 0, 0, true, true)
if err != nil {
t.Error(err)
}
if res != strings.ToLower(res) {
t.Errorf("%q is not lowercase", res)
}
}
})
t.Run("gen_uppercase", func(t *testing.T) {
t.Parallel()
res, err := gen.Generate(1000, 0, 0, false, true)
if err != nil {
t.Error(err)
}
if res == strings.ToLower(res) {
t.Errorf("%q does not include uppercase", res)
}
})
t.Run("gen_no_repeats", func(t *testing.T) {
t.Parallel()
for i := 0; i < N; i++ {
res, err := gen.Generate(52, 10, 30, false, false)
if err != nil {
t.Error(err)
}
if testHasDuplicates(t, res) {
t.Errorf("%q should not have duplicates", res)
}
}
})
}
func TestGeneratorGenerate(t *testing.T) {
t.Parallel()
testGeneratorGenerate(t, nil)
}
func TestGenerator_Reader_Generate(t *testing.T) {
t.Parallel()
testGeneratorGenerate(t, &MockReader{})
}
func testGeneratorGenerateCustom(t *testing.T, reader io.Reader) {
t.Helper()
gen, err := NewGenerator(&GeneratorInput{
LowerLetters: "abcde",
UpperLetters: "ABCDE",
Symbols: "!@#$%",
Digits: "01234",
Reader: reader,
})
if err != nil {
t.Fatal(err)
}
for i := 0; i < N; i++ {
res, err := gen.Generate(52, 10, 10, false, true)
if err != nil {
t.Error(err)
}
if strings.Contains(res, "f") {
t.Errorf("%q should only contain lower letters abcde", res)
}
if strings.Contains(res, "F") {
t.Errorf("%q should only contain upper letters ABCDE", res)
}
if strings.Contains(res, "&") {
t.Errorf("%q should only include symbols !@#$%%", res)
}
if strings.Contains(res, "5") {
t.Errorf("%q should only contain digits 01234", res)
}
}
}
func TestGeneratorGenerateCustom(t *testing.T) {
t.Parallel()
testGeneratorGenerateCustom(t, nil)
}
func TestGenerator_Reader_Generate_Custom(t *testing.T) {
t.Parallel()
testGeneratorGenerateCustom(t, &MockReader{})
}
|
