tests/exp.tests

   1 #   This program is free software: you can redistribute it and/or modify
   2 #   it under the terms of the GNU General Public License as published by
   3 #   the Free Software Foundation, either version 3 of the License, or
   4 #   (at your option) any later version.
   5 #
   6 #   This program is distributed in the hope that it will be useful,
   7 #   but WITHOUT ANY WARRANTY; without even the implied warranty of
   8 #   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   9 #   GNU General Public License for more details.
  10 #
  11 #   You should have received a copy of the GNU General Public License
  12 #   along with this program.  If not, see <http://www.gnu.org/licenses/>.
  13 #
  14 #
  15 # A suite of tests for bash word expansions
  16 #
  17 # This tests parameter and variable expansion, with an empahsis on
  18 # proper quoting behavior.
  19 #
  20 # Chet Ramey
  21
  22 #
  23 # If you comment out the body of this function, you can do a diff against
  24 # `expansion-tests.right' to see if the shell is behaving correctly
  25 #
  26 expect()
  27 {
  28         echo expect "$@"
  29 }
  30
  31 # Test the substitution quoting characters (CTLESC and CTLNUL) in different
  32 # combinations
  33
  34 expect "<^A>"
  35 recho `echo '\ 1'`
  36 expect "<^A>"
  37 recho `echo "\ 1"`
  38 expect "<^?>"
  39 recho `echo '\7f'`
  40 expect "<^?>"
  41 recho `echo "\7f"`
  42 expect "<^A>"
  43 recho `echo \ 1`
  44 expect "<^?>"
  45 recho `echo \7f`
  46
  47 expect "bar"
  48 recho ${foo:-"`echo bar`"}
  49 expect "<^A>"
  50 recho ${foo:-"`echo \ 1`"}
  51 expect "<^?>"
  52 recho ${foo:-"`echo \7f`"}
  53
  54 expect "<^A>"
  55 recho "`echo \ 1`"
  56 expect "<^?>"
  57 recho "`echo \7f`"
  58
  59 # Test null strings without variable expansion
  60 expect "<abcdefgh>"
  61 recho abcd""efgh
  62 expect "<abcdefgh>"
  63 recho abcd''efgh
  64 expect "<abcdefgh>"
  65 recho ""abcdefgh
  66 expect "<abcdefgh>"
  67 recho ''abcdefgh
  68 expect "<abcd>"
  69 recho abcd""
  70 expect "<abcd>"
  71 recho abcd''
  72
  73 # Test the quirky behavior of $@ in ""
  74 expect nothing
  75 recho "$@"
  76 expect "< >"
  77 recho " $@"
  78 expect "<-->"
  79 recho "-${@}-"
  80
  81 # Test null strings with variable expansion that fails
  82 expect '<>'
  83 recho $xxx""
  84 expect '<>'
  85 recho ""$xxx
  86 expect '<>'
  87 recho $xxx''
  88 expect '<>'
  89 recho ''$xxx
  90 expect '<>'
  91 recho $xxx""$yyy
  92 expect '<>'
  93 recho $xxx''$yyy
  94
  95 # Test null strings with variable expansion that succeeds
  96 xxx=abc
  97 yyy=def
  98
  99 expect '<abc>'
 100 recho $xxx""
 101 expect '<abc>'
 102 recho ""$xxx
 103 expect '<abc>'
 104 recho $xxx''
 105 expect '<abc>'
 106 recho ''$xxx
 107 expect '<abcdef>'
 108 recho $xxx""$yyy
 109 expect '<abcdef>'
 110 recho $xxx''$yyy
 111
 112 unset xxx yyy
 113
 114 # Test the unquoted special quoting characters
 115 expect "<^A>"
 116 recho \ 1
 117 expect "<^?>"
 118 recho \7f
 119 expect "<^A>"
 120 recho "\ 1"
 121 expect "<^?>"
 122 recho "\7f"
 123 expect "<^A>"
 124 recho '\ 1'
 125 expect "<^?>"
 126 recho '\7f'
 127
 128 # Test expansion of a variable that is unset
 129 expect nothing
 130 recho $xxx
 131 expect '<>'
 132 recho "$xxx"
 133
 134 expect nothing
 135 recho "$xxx${@}"
 136
 137 # Test empty string expansion
 138 expect '<>'
 139 recho ""
 140 expect '<>'
 141 recho ''
 142
 143 # Test command substitution with (disabled) history substitution
 144 expect '<Hello World!>'
 145 # set +H
 146 recho "`echo \"Hello world!\"`"
 147
 148 # Test some shell special characters
 149 expect '<`>'
 150 recho "\`"
 151 expect '<">'
 152 recho "\""
 153 expect '<\^A>'
 154 recho "\\ 1"
 155
 156 expect '<\$>'
 157 recho "\\$"
 158
 159 expect '<\\>'
 160 recho "\\\\"
 161
 162 # This should give argv[1] = a argv[2] = b
 163 expect '<a> <b>'
 164 FOO=`echo 'a b' | tr ' ' '\012'`
 165 recho $FOO
 166
 167 # This should give argv[1] = ^A argv[2] = ^?
 168 expect '<^A> <^?>'
 169 FOO=`echo '\ 1 \7f' | tr ' ' '\012'`
 170 recho $FOO
 171
 172 # Test quoted and unquoted globbing characters
 173 expect '<**>'
 174 recho "*"*
 175
 176 expect '<\.\./*/>'
 177 recho "\.\./*/"
 178
 179 # Test patterns that come up when the shell quotes funny character
 180 # combinations
 181 expect '<^A^?^A^?>'
 182 recho '\ 1\7f\ 1\7f'
 183 expect '<^A^A>'
 184 recho '\ 1\ 1'
 185 expect '<^A^?>'
 186 recho '\ 1\7f'
 187 expect '<^A^A^?>'
 188 recho '\ 1\ 1\7f'
 189
 190 # More tests of "$@"
 191 set abc def ghi jkl
 192 expect '<  abc> <def> <ghi> <jkl  >'
 193 recho "  $@  "
 194 expect '<  abc> <def> <ghi> <jkl  >'
 195 recho "${1+  $@  }"
 196
 197 set abc def ghi jkl
 198 expect '<--abc> <def> <ghi> <jkl-->'
 199 recho "--$@--"
 200
 201 set "a b" cd ef gh
 202 expect '<a b> <cd> <ef> <gh>'
 203 recho ${1+"$@"}
 204 expect '<a b> <cd> <ef> <gh>'
 205 recho ${foo:-"$@"}
 206 expect '<a b> <cd> <ef> <gh>'
 207 recho "${@}"
 208
 209 expect '<  >'
 210 recho "  "
 211 expect '< - >'
 212 recho " - "
 213
 214 # Test combinations of different types of quoting in a fully-quoted string
 215 # (so the WHOLLY_QUOTED tests fail and it doesn't get set)
 216 expect '</^root:/{s/^[^:]*:[^:]*:\([^:]*\).*$/\1/>'
 217 recho "/^root:/{s/^[^:]*:[^:]*:\([^:]*\).*"'$'"/\1/"
 218
 219 # Test the various Posix parameter expansions
 220
 221 expect '<foo bar>'
 222 recho "${x:-$(echo "foo bar")}"
 223 expect '<foo> <bar>'
 224 recho ${x:-$(echo "foo bar")}
 225
 226 unset X
 227 expect '<abc>'
 228 recho ${X:=abc}
 229 expect '<abc>'
 230 recho $X
 231
 232 set a b c
 233 expect '<posix>'
 234 recho ${3:+posix}
 235
 236 POSIX=/usr/posix
 237 expect '<10>'
 238 recho ${#POSIX}
 239
 240 # remove shortest trailing match
 241 x=file.c
 242 expect '<file.o>'
 243 recho ${x%.c}.o
 244
 245 # remove longest trailing match
 246 x=posix/src/std
 247 expect '<posix>'
 248 recho ${x%%/*}
 249
 250 # remove shortest leading pattern
 251 x=$HOME/src/cmd
 252 expect '</src/cmd>'
 253 recho ${x#$HOME}
 254
 255 # remove longest leading pattern
 256 x=/one/two/three
 257 expect '<three>'
 258 recho ${x##*/}
 259
 260 # pattern removal of patterns that don't match
 261 z=abcdef
 262
 263 expect '<abcdef>'
 264 recho ${z#xyz}
 265 expect '<abcdef>'
 266 recho ${z##xyz}
 267
 268 expect '<abcdef>'
 269 recho ${z%xyz}
 270 expect '<abcdef>'
 271 recho ${z%%xyz}
 272
 273 # Command substitution and the quirky differences between `` and $()
 274
 275 expect '<\$x>'
 276 recho '\$x'
 277
 278 expect '<$x>'
 279 recho `echo '\$x'`
 280
 281 expect '<\$x>'
 282 recho $(echo '\$x')
 283
 284 # The difference between $* "$*" and "$@"
 285
 286 set "abc" "def ghi" "jkl"
 287
 288 expect '<abc> <def> <ghi> <jkl>'
 289 recho $*
 290
 291 expect '<abc def ghi jkl>'
 292 recho "$*"
 293
 294 OIFS="$IFS"
 295 IFS=":$IFS"
 296
 297 # The special behavior of "$*", using the first character of $IFS as separator
 298 expect '<abc:def ghi:jkl>'
 299 recho "$*"
 300
 301 IFS="$OIFS"
 302
 303 expect '<abc> <def ghi> <jkl>'
 304 recho "$@"
 305
 306 expect '<xxabc> <def ghi> <jklyy>'
 307 recho "xx$@yy"
 308
 309 expect '<abc> <def ghi> <jklabc> <def ghi> <jkl>'
 310 recho "$@$@"
 311
 312 foo=abc
 313 bar=def
 314
 315 expect '<abcdef>'
 316 recho "$foo""$bar"
 317
 318 unset foo
 319 set $foo bar '' xyz "$foo" abc
 320
 321 expect '<bar> <> <xyz> <> <abc>'
 322 recho "$@"
 323
 324 # More tests of quoting and deferred evaluation
 325
 326 foo=10 x=foo
 327 y='$'$x
 328 expect '<$foo>'
 329 recho $y
 330 eval y='$'$x
 331 expect '<10>'
 332 recho $y
 333
 334 # case statements
 335
 336 NL='
 337 '
 338 x='ab
 339 cd'
 340
 341 expect '<newline expected>'
 342 case "$x" in
 343 *$NL*)  recho "newline expected" ;;
 344 esac
 345
 346 expect '<got it>'
 347 case \? in
 348 *"?"*) recho "got it" ;;
 349 esac
 350
 351 expect '<got it>'
 352 case \? in
 353 *\?*) recho "got it" ;;
 354 esac
 355
 356 set one two three four five
 357 expect '<one> <three> <five>'
 358 recho $1 $3 ${5} $8 ${9}
 359
 360 # length tests on positional parameters and some special parameters
 361
 362 expect '<5> <5>'
 363 recho $# ${#}
 364 expect '<3>'
 365 recho ${#1}
 366 expect '<1>'
 367 recho ${##}
 368 expect '<1>'
 369 recho ${#?}
 370 expect '<5>'
 371 recho ${#@}
 372 expect '<5>'
 373 recho ${#*}
 374 expect '<5>'
 375 recho "${#@}"
 376 expect '<5>'
 377 recho "${#*}"
 378
 379 expect '<42>'
 380 recho $((28 + 14))
 381 expect '<26>'
 382 recho $[ 13 * 2 ]
 383
 384 expect '<\>'
 385 recho `echo \\\\`
 386
 387 expect '<~>'
 388 recho '~'
 389
 390 expect nothing
 391 recho $!
 392 expect nothing
 393 recho ${!}
 394
 395 # test word splitting of assignment statements not preceding a command
 396 a="a b c d e"
 397 declare b=$a
 398 expect '<a> <b> <c> <d> <e>'
 399 recho $b
 400
 401 a="a?b?c"
 402
 403 echo ${a//\\?/ }
 404
 405 echo ${a//\?/ }
 406
 407 ${THIS_SH} -c 'var=a:b: ; IFS=" :" ; recho $var""' bash
 408
 409 ${THIS_SH} ./exp1.sub
 410
 411 ${THIS_SH} ./exp2.sub
 412
 413 ${THIS_SH} ./exp3.sub
 414
 415 ${THIS_SH} ./exp4.sub
 416
 417 ${THIS_SH} ./exp5.sub
 418
 419 ${THIS_SH} ./exp6.sub
 420 ${THIS_SH} ./exp7.sub
 421 ${THIS_SH} ./exp8.sub
 422 ${THIS_SH} ./exp9.sub
 423 ${THIS_SH} ./exp10.sub
 424 ${THIS_SH} ./exp11.sub
 425 ${THIS_SH} ./exp12.sub