FilesExpand file tree

master

/

polybius_test.go

Copy path

Blame

More file actions

Blame

More file actions

Latest commit

 

History

History

History

190 lines (181 loc) · 5 KB

master

/

polybius_test.go

Copy path

Top

File metadata and controls

• Code
• Blame

190 lines (181 loc) · 5 KB

Raw

Copy raw file

Download raw file

Open symbols panel

Edit and raw actions

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

32

33

34

35

36

37

38

39

40

41

42

43

44

45

46

47

48

49

50

51

52

53

54

55

56

57

58

59

60

61

62

63

64

65

66

67

68

69

70

71

72

73

74

75

76

77

78

79

80

81

82

83

84

85

86

87

88

89

90

91

92

93

94

95

96

97

98

99

100

101

102

103

104

105

106

107

108

109

110

111

112

113

114

115

116

117

118

119

120

121

122

123

124

125

126

127

128

129

130

131

132

133

134

135

136

137

138

139

140

141

142

143

144

145

146

147

148

149

150

151

152

153

154

155

156

157

158

159

160

161

162

163

164

165

166

167

168

169

170

171

172

173

174

175

176

177

178

179

180

181

182

183

184

185

186

187

188

189

190

package polybius

import (

"fmt"

"log"

"strings"

"testing"

)

func ExampleNewPolybius() {

// initialize

const (

plainText = "HogeFugaPiyoSpam"

size = 5

characters = "HogeF"

key = "abcdefghijklmnopqrstuvwxy"

)

p, err := NewPolybius(key, size, characters)

if err != nil {

log.Fatalf("failed NewPolybius: %v", err)

}

encryptedText, err := p.Encrypt(plainText)

if err != nil {

log.Fatalf("failed Encrypt: %v", err)

}

fmt.Printf("Encrypt=> plainText: %s, encryptedText: %s\n", plainText, encryptedText)

decryptedText, err := p.Decrypt(encryptedText)

if err != nil {

log.Fatalf("failed Decrypt: %v", err)

}

fmt.Printf("Decrypt=> encryptedText: %s, decryptedText: %s\n", encryptedText, decryptedText)

// Output:

// Encrypt=> plainText: HogeFugaPiyoSpam, encryptedText: OGGFOOHFOHFHOOHHEHOEFFGFEEEHHHGG

// Decrypt=> encryptedText: OGGFOOHFOHFHOOHHEHOEFFGFEEEHHHGG, decryptedText: HOGEFUGAPIYOSPAM

}

func TestNewPolybius(t *testing.T) {

t.Parallel()

cases := []struct {

name string

size int

characters string

key string

wantErr string

}{

{

name: "correct initialization", size: 5, characters: "HogeF", key: "abcdefghijklmnopqrstuvwxy", wantErr: "",

},

{

name: "truncate characters", size: 5, characters: "HogeFuga", key: "abcdefghijklmnopqrstuvwxy", wantErr: "",

},

{

name: "invalid key", size: 5, characters: "HogeFuga", key: "abcdefghi", wantErr: "len(key): 9 must be as long as size squared: 25",

},

{

name: "invalid characters", size: 5, characters: "HogeH", key: "abcdefghijklmnopqrstuvwxy", wantErr: "\"OGEH\" contains same character 'H'",

},

}

for _, tc := range cases {

t.Run(tc.name, func(t *testing.T) {

_, err := NewPolybius(tc.key, tc.size, tc.characters)

if err != nil && err.Error() != tc.wantErr {

t.Errorf("failed NewPolybius: %v", err)

}

})

}

}

func TestPolybiusEncrypt(t *testing.T) {

t.Parallel()

cases := []struct {

name string

text string

want string

}{

{

name: "correct encryption", text: "HogeFugaPiyoSpam", want: "OGGFOOHFOHFHOOHHEHOEFFGFEEEHHHGG",

},

{

name: "invalid encryption", text: "hogz", want: "failed encipher: 'Z' does not exist in keys",

},

}

// initialize

const (

size = 5

characters = "HogeF"

key = "abcdefghijklmnopqrstuvwxy"

)

p, err := NewPolybius(key, size, characters)

if err != nil {

t.Fatalf("failed NewPolybius: %v", err)

}

for _, tc := range cases {

t.Run(tc.name, func(t *testing.T) {

encrypted, err := p.Encrypt(tc.text)

if err != nil {

if err.Error() != tc.want {

t.Errorf("failed Encrypt: %v", err)

}

} else if encrypted != tc.want {

t.Errorf("Encrypt: %v, want: %v", encrypted, tc.want)

}

})

}

}

func TestPolybiusDecrypt(t *testing.T) {

t.Parallel()

cases := []struct {

name string

text string

want string

}{

{

name: "correct decryption", text: "OGGFOOHFOHFHOOHHEHOEFFGFEEEHHHGG", want: "HOGEFUGAPIYOSPAM",

},

{

name: "invalid decryption(position of even number)", text: "hogz", want: "failed decipher: Z does not exist in characters",

},

{

name: "invalid decryption(position of odd number)", text: "hode", want: "failed decipher: D does not exist in characters",

},

{

name: "invalid text size which is odd", text: "hog", want: "failed decipher: the size of \"chars\" must be even",

},

}

// initialize

const (

size = 5

characters = "HogeF"

key = "abcdefghijklmnopqrstuvwxy"

)

p, err := NewPolybius(key, size, characters)

if err != nil {

t.Fatalf("failed NewPolybius: %v", err)

}

for _, tc := range cases {

t.Run(tc.name, func(t *testing.T) {

encrypted, err := p.Decrypt(tc.text)

if err != nil {

if err.Error() != tc.want {

t.Errorf("failed Encrypt: %v", err)

}

} else if encrypted != tc.want {

t.Errorf("Encrypt: %v, want: %v", encrypted, tc.want)

}

})

}

}

func FuzzPolybius(f *testing.F) {

const (

size = 5

characters = "HogeF"

key = "abcdefghijklmnopqrstuvwxy"

)

f.Add(size, characters, key)

f.Fuzz(func(t *testing.T, size int, characters, key string) {

p, err := NewPolybius(key, size, characters)

switch {

case err == nil:

case strings.Contains(err.Error(), "cannot be negative"),

strings.Contains(err.Error(), "is too small"),

strings.Contains(err.Error(), "should only contain latin characters"),

strings.Contains(err.Error(), "contains same character"),

strings.Contains(err.Error(), "must be as long as size squared"):

return

default:

t.Fatalf("unexpected error when creating a new polybius variable: %v", err)

}

encrypted, err := p.Encrypt(characters)

switch {

case err == nil:

case strings.Contains(err.Error(), "does not exist in keys"):

return

default:

t.Fatalf("unexpected error during encryption: %v", err)

}

decrypted, err := p.Decrypt(encrypted)

if err != nil {

t.Fatalf("unexpected error during decryption: %v", err)

}

if decrypted != strings.ToUpper(characters) {

t.Errorf("Expecting output to match with %q but was %q", characters, decrypted)

}

})

}