1package text
2
3import (
4 "strings"
5 "testing"
6)
7
8func TestWrap(t *testing.T) {
9 cases := []struct {
10 Input, Output string
11 Lim int
12 }{
13 // A simple word passes through.
14 {
15 "foo",
16 "foo",
17 4,
18 },
19 // Word breaking
20 {
21 "foobarbaz",
22 "foob\narba\nz",
23 4,
24 },
25 // Lines are broken at whitespace.
26 {
27 "foo bar baz",
28 "foo\nbar\nbaz",
29 4,
30 },
31 // Word breaking
32 {
33 "foo bars bazzes",
34 "foo\nbars\nbazz\nes",
35 4,
36 },
37 // A word that would run beyond the width is wrapped.
38 {
39 "fo sop",
40 "fo\nsop",
41 4,
42 },
43 // A tab counts as 4 characters.
44 {
45 "foo\nb\t r\n baz",
46 "foo\nb\n r\n baz",
47 4,
48 },
49 // Trailing whitespace is removed after used for wrapping.
50 // Runs of whitespace on which a line is broken are removed.
51 {
52 "foo \nb ar ",
53 "foo\n\nb\nar\n",
54 4,
55 },
56 // An explicit line break at the end of the input is preserved.
57 {
58 "foo bar baz\n",
59 "foo\nbar\nbaz\n",
60 4,
61 },
62 // Explicit break are always preserved.
63 {
64 "\nfoo bar\n\n\nbaz\n",
65 "\nfoo\nbar\n\n\nbaz\n",
66 4,
67 },
68 // Ignore complete words with terminal color sequence
69 {
70 "foo \x1b[31mbar\x1b[0m baz",
71 "foo\n\x1b[31mbar\x1b[0m\nbaz",
72 4,
73 },
74 // Handle words with colors sequence inside the word
75 {
76 "foo b\x1b[31mbar\x1b[0mr baz",
77 "foo\nb\x1b[31mbar\n\x1b[0mr\nbaz",
78 4,
79 },
80 // Break words with colors sequence inside the word
81 {
82 "foo bb\x1b[31mbar\x1b[0mr baz",
83 "foo\nbb\x1b[31mba\nr\x1b[0mr\nbaz",
84 4,
85 },
86 // Complete example:
87 {
88 " This is a list: \n\n\t* foo\n\t* bar\n\n\n\t* baz \nBAM ",
89 " This\nis a\nlist:\n\n\n *\nfoo\n *\nbar\n\n\n *\nbaz\nBAM\n",
90 6,
91 },
92 // Handle chinese
93 {
94 "婞一枳郲逴靲屮蜧曀殳，掫乇峔掮傎溒兀緉冘仜。",
95 "婞一枳郲逴靲屮蜧曀殳，掫\n乇峔掮傎溒兀緉冘仜。",
96 12,
97 },
98 // Handle chinese with colors
99 {
100 "婞一枳郲逴\x1b[31m靲屮蜧曀殳，掫乇峔掮傎溒\x1b[0m兀緉冘仜。",
101 "婞一枳郲逴\x1b[31m靲屮蜧曀殳，掫\n乇峔掮傎溒\x1b[0m兀緉冘仜。",
102 12,
103 },
104 }
105
106 for i, tc := range cases {
107 actual, lines := Wrap(tc.Input, tc.Lim)
108 if actual != tc.Output {
109 t.Fatalf("Case %d Input:\n\n`%s`\n\nExpected Output:\n\n`%s`\n\nActual Output:\n\n`%s`",
110 i, tc.Input, tc.Output, actual)
111 }
112
113 expected := len(strings.Split(tc.Output, "\n"))
114 if expected != lines {
115 t.Fatalf("Case %d Nb lines mismatch\nExpected:%d\nActual:%d",
116 i, expected, lines)
117 }
118 }
119}
120
121func TestWordLen(t *testing.T) {
122 cases := []struct {
123 Input string
124 Length int
125 }{
126 // A simple word
127 {
128 "foo",
129 3,
130 },
131 // A simple word with colors
132 {
133 "\x1b[31mbar\x1b[0m",
134 3,
135 },
136 // Handle prefix and suffix properly
137 {
138 "foo\x1b[31mfoobarHoy\x1b[0mbaaar",
139 17,
140 },
141 // Handle chinese
142 {
143 "快檢什麼望對",
144 6,
145 },
146 // Handle chinese with colors
147 {
148 "快\x1b[31m檢什麼\x1b[0m望對",
149 6,
150 },
151 }
152
153 for i, tc := range cases {
154 l := wordLen(tc.Input)
155 if l != tc.Length {
156 t.Fatalf("Case %d Input:\n\n`%s`\n\nExpected Output:\n\n`%d`\n\nActual Output:\n\n`%d`",
157 i, tc.Input, tc.Length, l)
158 }
159 }
160}
161
162func TestSplitWord(t *testing.T) {
163 cases := []struct {
164 Input string
165 Length int
166 Result, Leftover string
167 }{
168 // A simple word passes through.
169 {
170 "foo",
171 4,
172 "foo", "",
173 },
174 // Cut at the right place
175 {
176 "foobarHoy",
177 4,
178 "foob", "arHoy",
179 },
180 // A simple word passes through with colors
181 {
182 "\x1b[31mbar\x1b[0m",
183 4,
184 "\x1b[31mbar\x1b[0m", "",
185 },
186 // Cut at the right place with colors
187 {
188 "\x1b[31mfoobarHoy\x1b[0m",
189 4,
190 "\x1b[31mfoob", "arHoy\x1b[0m",
191 },
192 // Handle prefix and suffix properly
193 {
194 "foo\x1b[31mfoobarHoy\x1b[0mbaaar",
195 4,
196 "foo\x1b[31mf", "oobarHoy\x1b[0mbaaar",
197 },
198 // Cut properly with length = 0
199 {
200 "foo",
201 0,
202 "", "foo",
203 },
204 // Handle chinese
205 {
206 "快檢什麼望對",
207 2,
208 "快檢", "什麼望對",
209 },
210 // Handle chinese with colors
211 {
212 "快\x1b[31m檢什麼\x1b[0m望對",
213 2,
214 "快\x1b[31m檢", "什麼\x1b[0m望對",
215 },
216 }
217
218 for i, tc := range cases {
219 result, leftover := splitWord(tc.Input, tc.Length)
220 if result != tc.Result || leftover != tc.Leftover {
221 t.Fatalf("Case %d Input:\n\n`%s`\n\nExpected Output:\n\n`%s` - `%s`\n\nActual Output:\n\n`%s` - `%s`",
222 i, tc.Input, tc.Result, tc.Leftover, result, leftover)
223 }
224 }
225}