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 TestWrapLeftPadded(t *testing.T) {
122 cases := []struct {
123 input, output string
124 lim, pad int
125 }{
126 {
127 "The Lorem ipsum text is typically composed of pseudo-Latin words. It is commonly used as placeholder text to examine or demonstrate the visual effects of various graphic design.",
128 ` The Lorem ipsum text is typically composed of
129 pseudo-Latin words. It is commonly used as placeholder
130 text to examine or demonstrate the visual effects of
131 various graphic design.`,
132 59, 4,
133 },
134 // Handle Chinese
135 {
136 "婞一枳郲逴靲屮蜧曀殳，掫乇峔掮傎溒兀緉冘仜。郼牪艽螗媷錵朸一詅掜豗怙刉笀丌，楀棶乇矹迡搦囷圣亍昄漚粁仈祂。覂一洳袶揙楱亍滻瘯毌，掗屮柅軡菵腩乜榵毌夯。勼哻怌婇怤灟葠雺奷朾恦扰衪岨坋誁乇芚誙腞。冇笉妺悆浂鱦賌廌灱灱觓坋佫呬耴跣兀枔蓔輈。嵅咍犴膰痭瘰机一靬涽捊矷尒玶乇，煚塈丌岰陊鉖怞戉兀甿跾觓夬侄。棩岧汌橩僁螗玎一逭舴圂衪扐衲兀，嵲媕亍衩衿溽昃夯丌侄蒰扂丱呤。毰侘妅錣廇螉仴一暀淖蚗佶庂咺丌，輀鈁乇彽洢溦洰氶乇构碨洐巿阹。",
137 ` 婞一枳郲逴靲屮蜧曀殳，掫乇峔掮傎溒兀緉冘仜。郼牪艽螗媷錵朸一詅掜豗怙刉笀丌，楀棶乇矹迡搦囷圣亍昄漚粁仈祂。覂一
138 洳袶揙楱亍滻瘯毌，掗屮柅軡菵腩乜榵毌夯。勼哻怌婇怤灟葠雺奷朾恦扰衪岨坋誁乇芚誙腞。冇笉妺悆浂鱦賌廌灱灱觓坋佫呬
139 耴跣兀枔蓔輈。嵅咍犴膰痭瘰机一靬涽捊矷尒玶乇，煚塈丌岰陊鉖怞戉兀甿跾觓夬侄。棩岧汌橩僁螗玎一逭舴圂衪扐衲兀，嵲
140 媕亍衩衿溽昃夯丌侄蒰扂丱呤。毰侘妅錣廇螉仴一暀淖蚗佶庂咺丌，輀鈁乇彽洢溦洰氶乇构碨洐巿阹。`,
141 59, 4,
142 },
143 }
144
145 for i, tc := range cases {
146 actual, lines := WrapLeftPadded(tc.input, tc.lim, tc.pad)
147 if actual != tc.output {
148 t.Fatalf("Case %d Input:\n\n`%s`\n\nExpected Output:\n`\n%s`\n\nActual Output:\n`\n%s\n%s`",
149 i, tc.input, tc.output,
150 "|"+strings.Repeat("-", tc.lim-2)+"|",
151 actual)
152 }
153
154 expected := len(strings.Split(tc.output, "\n"))
155 if expected != lines {
156 t.Fatalf("Case %d Nb lines mismatch\nExpected:%d\nActual:%d",
157 i, expected, lines)
158 }
159 }
160}
161
162func TestWordLen(t *testing.T) {
163 cases := []struct {
164 Input string
165 Length int
166 }{
167 // A simple word
168 {
169 "foo",
170 3,
171 },
172 // A simple word with colors
173 {
174 "\x1b[31mbar\x1b[0m",
175 3,
176 },
177 // Handle prefix and suffix properly
178 {
179 "foo\x1b[31mfoobarHoy\x1b[0mbaaar",
180 17,
181 },
182 // Handle chinese
183 {
184 "快檢什麼望對",
185 6,
186 },
187 // Handle chinese with colors
188 {
189 "快\x1b[31m檢什麼\x1b[0m望對",
190 6,
191 },
192 }
193
194 for i, tc := range cases {
195 l := wordLen(tc.Input)
196 if l != tc.Length {
197 t.Fatalf("Case %d Input:\n\n`%s`\n\nExpected Output:\n\n`%d`\n\nActual Output:\n\n`%d`",
198 i, tc.Input, tc.Length, l)
199 }
200 }
201}
202
203func TestSplitWord(t *testing.T) {
204 cases := []struct {
205 Input string
206 Length int
207 Result, Leftover string
208 }{
209 // A simple word passes through.
210 {
211 "foo",
212 4,
213 "foo", "",
214 },
215 // Cut at the right place
216 {
217 "foobarHoy",
218 4,
219 "foob", "arHoy",
220 },
221 // A simple word passes through with colors
222 {
223 "\x1b[31mbar\x1b[0m",
224 4,
225 "\x1b[31mbar\x1b[0m", "",
226 },
227 // Cut at the right place with colors
228 {
229 "\x1b[31mfoobarHoy\x1b[0m",
230 4,
231 "\x1b[31mfoob", "arHoy\x1b[0m",
232 },
233 // Handle prefix and suffix properly
234 {
235 "foo\x1b[31mfoobarHoy\x1b[0mbaaar",
236 4,
237 "foo\x1b[31mf", "oobarHoy\x1b[0mbaaar",
238 },
239 // Cut properly with length = 0
240 {
241 "foo",
242 0,
243 "", "foo",
244 },
245 // Handle chinese
246 {
247 "快檢什麼望對",
248 2,
249 "快檢", "什麼望對",
250 },
251 {
252 "快檢什麼望對",
253 3,
254 "快檢什", "麼望對",
255 },
256 // Handle chinese with colors
257 {
258 "快\x1b[31m檢什麼\x1b[0m望對",
259 2,
260 "快\x1b[31m檢", "什麼\x1b[0m望對",
261 },
262 }
263
264 for i, tc := range cases {
265 result, leftover := splitWord(tc.Input, tc.Length)
266 if result != tc.Result || leftover != tc.Leftover {
267 t.Fatalf("Case %d Input:\n\n`%s`\n\nExpected Output:\n\n`%s` - `%s`\n\nActual Output:\n\n`%s` - `%s`",
268 i, tc.Input, tc.Result, tc.Leftover, result, leftover)
269 }
270 }
271}