1 ## compare_shells: dash bash mksh zsh
2
3 # Test the length oeprator, which dash supports. Dash doesn't support most
4 # other ops.
5
6 #### String length
7 v=foo
8 echo ${#v}
9 ## stdout: 3
10
11 #### Unicode string length (UTF-8)
12 v=$'_\u03bc_'
13 echo ${#v}
14 ## stdout: 3
15 ## N-I dash stdout: 9
16 ## N-I mksh stdout: 4
17
18 #### Unicode string length (spec/testdata/utf8-chars.txt)
19 v=$(cat $REPO_ROOT/spec/testdata/utf8-chars.txt)
20 echo ${#v}
21 ## stdout: 7
22 ## N-I dash stdout: 13
23 ## N-I mksh stdout: 13
24
25 #### String length with incomplete utf-8
26 for num_bytes in 0 1 2 3 4 5 6 7 8 9 10 11 12 13; do
27 s=$(head -c $num_bytes $REPO_ROOT/spec/testdata/utf8-chars.txt)
28 echo ${#s}
29 done 2> $TMP/err.txt
30
31 grep 'warning:' $TMP/err.txt
32 true # exit 0
33
34 ## STDOUT:
35 0
36 1
37 2
38 -1
39 3
40 4
41 -1
42 -1
43 5
44 6
45 -1
46 -1
47 -1
48 7
49 [ stdin ]:3: warning: UTF-8 decode: Truncated bytes at offset 2 in string of 3 bytes
50 [ stdin ]:3: warning: UTF-8 decode: Truncated bytes at offset 5 in string of 6 bytes
51 [ stdin ]:3: warning: UTF-8 decode: Truncated bytes at offset 5 in string of 7 bytes
52 [ stdin ]:3: warning: UTF-8 decode: Truncated bytes at offset 9 in string of 10 bytes
53 [ stdin ]:3: warning: UTF-8 decode: Truncated bytes at offset 9 in string of 11 bytes
54 [ stdin ]:3: warning: UTF-8 decode: Truncated bytes at offset 9 in string of 12 bytes
55 ## END
56 # zsh behavior actually matches bash!
57 ## BUG bash/zsh stderr-json: ""
58 ## BUG bash/zsh STDOUT:
59 0
60 1
61 2
62 3
63 3
64 4
65 5
66 6
67 5
68 6
69 7
70 8
71 9
72 7
73 ## END
74 ## N-I dash/mksh stderr-json: ""
75 ## N-I dash/mksh STDOUT:
76 0
77 1
78 2
79 3
80 4
81 5
82 6
83 7
84 8
85 9
86 10
87 11
88 12
89 13
90 ## END
91
92 #### String length with invalid utf-8 continuation bytes
93 for num_bytes in 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14; do
94 s=$(head -c $num_bytes $REPO_ROOT/spec/testdata/utf8-chars.txt)$(echo -e "\xFF")
95 echo ${#s}
96 done 2> $TMP/err.txt
97
98 grep 'warning:' $TMP/err.txt
99 true
100
101 ## STDOUT:
102 -1
103 -1
104 -1
105 -1
106 -1
107 -1
108 -1
109 -1
110 -1
111 -1
112 -1
113 -1
114 -1
115 -1
116 -1
117 [ stdin ]:3: warning: UTF-8 decode: Bad encoding at offset 0 in string of 1 bytes
118 [ stdin ]:3: warning: UTF-8 decode: Bad encoding at offset 1 in string of 2 bytes
119 [ stdin ]:3: warning: UTF-8 decode: Bad encoding at offset 2 in string of 3 bytes
120 [ stdin ]:3: warning: UTF-8 decode: Bad encoding at offset 2 in string of 4 bytes
121 [ stdin ]:3: warning: UTF-8 decode: Bad encoding at offset 4 in string of 5 bytes
122 [ stdin ]:3: warning: UTF-8 decode: Bad encoding at offset 5 in string of 6 bytes
123 [ stdin ]:3: warning: UTF-8 decode: Bad encoding at offset 5 in string of 7 bytes
124 [ stdin ]:3: warning: UTF-8 decode: Bad encoding at offset 5 in string of 8 bytes
125 [ stdin ]:3: warning: UTF-8 decode: Bad encoding at offset 8 in string of 9 bytes
126 [ stdin ]:3: warning: UTF-8 decode: Bad encoding at offset 9 in string of 10 bytes
127 [ stdin ]:3: warning: UTF-8 decode: Bad encoding at offset 9 in string of 11 bytes
128 [ stdin ]:3: warning: UTF-8 decode: Bad encoding at offset 9 in string of 12 bytes
129 [ stdin ]:3: warning: UTF-8 decode: Bad encoding at offset 9 in string of 13 bytes
130 [ stdin ]:3: warning: UTF-8 decode: Bad encoding at offset 13 in string of 14 bytes
131 [ stdin ]:3: warning: UTF-8 decode: Bad encoding at offset 13 in string of 14 bytes
132 ## END
133 ## BUG bash/zsh stderr-json: ""
134 ## BUG bash/zsh STDOUT:
135 1
136 2
137 3
138 4
139 4
140 5
141 6
142 7
143 6
144 7
145 8
146 9
147 10
148 8
149 8
150 ## N-I dash stderr-json: ""
151 ## N-I dash STDOUT:
152 7
153 8
154 9
155 10
156 11
157 12
158 13
159 14
160 15
161 16
162 17
163 18
164 19
165 20
166 20
167 ## END
168 ## N-I mksh stderr-json: ""
169 ## N-I mksh STDOUT:
170 1
171 2
172 3
173 4
174 5
175 6
176 7
177 8
178 9
179 10
180 11
181 12
182 13
183 14
184 14
185 ## END
186
187 #### Length of undefined variable
188 echo ${#undef}
189 ## stdout: 0
190
191 #### Length of undefined variable with nounset
192 set -o nounset
193 echo ${#undef}
194 ## status: 1
195 ## OK dash status: 2
196
197 #### Length operator can't be followed by test operator
198 echo ${#x-default}
199
200 x=''
201 echo ${#x-default}
202
203 x='foo'
204 echo ${#x-default}
205
206 ## status: 2
207 ## OK bash/mksh status: 1
208 ## stdout-json: ""
209 ## BUG zsh status: 0
210 ## BUG zsh STDOUT:
211 7
212 0
213 3
214 ## END
215 ## BUG dash status: 0
216 ## BUG dash STDOUT:
217 0
218 0
219 3
220 ## END
221