187 lines
6.8 KiB
Bash
187 lines
6.8 KiB
Bash
# $NetBSD: t_fsplit.sh,v 1.2 2008/04/30 13:11:00 martin Exp $
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#
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# Copyright (c) 2007 The NetBSD Foundation, Inc.
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# All rights reserved.
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#
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# Redistribution and use in source and binary forms, with or without
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# modification, are permitted provided that the following conditions
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# are met:
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# 1. Redistributions of source code must retain the above copyright
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# notice, this list of conditions and the following disclaimer.
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# 2. Redistributions in binary form must reproduce the above copyright
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# notice, this list of conditions and the following disclaimer in the
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# documentation and/or other materials provided with the distribution.
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#
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# THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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# ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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# TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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# PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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# BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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# CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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# SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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# INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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# CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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# ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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# POSSIBILITY OF SUCH DAMAGE.
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#
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# The standard
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# http://www.opengroup.org/onlinepubs/009695399/utilities/xcu_chap02.html
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# explains (section 2.6) that Field splitting should be performed on the
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# result of variable expansions.
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# In particular this means that in ${x-word}, 'word' must be expanded as if
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# the "${x-" and "}" were absent from the input line.
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#
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# So: sh -c 'set ${x-a b c}; echo $#' should give 3.
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#
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nl='
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'
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check()
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{
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result="$(eval $1)"
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# Remove newlines
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oifs="$IFS"
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IFS="$nl"
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result="$(echo $result)"
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IFS="$oifs"
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if [ "$2" != "$result" ]
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then
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atf_fail "expected [$2], found [$result]"
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fi
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}
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atf_test_case for
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for_head() {
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atf_set "descr" "Checks field splitting in for loops"
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}
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for_body() {
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unset x
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# Since I managed to break this, leave the test in
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check 'for f in $x; do echo x${f}y; done' ''
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}
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atf_test_case default_val
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default_val_head() {
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atf_set "descr" "Checks field splitting in variable default values"
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}
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default_val_body() {
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unset x
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# Check that IFS is applied to text from ${x-...} unless it is inside
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# any set of "..."
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check 'set ${x-a b c}; echo $#' 3
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check 'for i in ${x-a b c}; do echo "z${i}z"; done' 'zaz zbz zcz'
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check 'for i in ${x-"a b" c}; do echo "z${i}z"; done' 'za bz zcz'
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check 'for i in ${x-"a ${x-b c}" d}; do echo "z${i}z"; done' 'za b cz zdz'
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check 'for i in ${x-"a ${x-"b c"}" d}; do echo "z${i}z"; done' 'za b cz zdz'
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check 'for i in ${x-a ${x-"b c"} d}; do echo "z${i}z"; done' 'zaz zb cz zdz'
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check 'for i in ${x-a ${x-b c} d}; do echo "z${i}z"; done' 'zaz zbz zcz zdz'
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}
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atf_test_case ifs_alpha
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ifs_alpha_head() {
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atf_set "descr" "Checks that field splitting works with alphabetic" \
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"characters"
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}
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ifs_alpha_body() {
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unset x
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# repeat with an alphabetic in IFS
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check 'IFS=q; set ${x-aqbqc}; echo $#' 3
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check 'IFS=q; for i in ${x-aqbqc}; do echo "z${i}z"; done' 'zaz zbz zcz'
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check 'IFS=q; for i in ${x-"aqb"qc}; do echo "z${i}z"; done' 'zaqbz zcz'
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check 'IFS=q; for i in ${x-"aq${x-bqc}"qd}; do echo "z${i}z"; done' 'zaqbqcz zdz'
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check 'IFS=q; for i in ${x-"aq${x-"bqc"}"qd}; do echo "z${i}z"; done' 'zaqbqcz zdz'
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check 'IFS=q; for i in ${x-aq${x-"bqc"}qd}; do echo "z${i}z"; done' 'zaz zbqcz zdz'
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}
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atf_test_case quote
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quote_head() {
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atf_set "descr" "Checks that field splitting works with multi-word" \
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"fields"
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}
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quote_body() {
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unset x
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# Some quote propagation checks
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check 'set "${x-a b c}"; echo $#' 1
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check 'set "${x-"a b" c}"; echo $1' 'a b c'
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check 'for i in "${x-a b c}"; do echo "z${i}z"; done' 'za b cz'
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}
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atf_test_case dollar_at
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dollar_at_head() {
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atf_set "descr" "Checks that field splitting works when expanding" \
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"\$@"
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}
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dollar_at_body() {
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unset x
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# Check we get "$@" right
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check 'set ""; for i; do echo "z${i}z"; done' 'zz'
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check 'set ""; for i in "$@"; do echo "z${i}z"; done' 'zz'
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check 'set "" ""; for i; do echo "z${i}z"; done' 'zz zz'
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check 'set "" ""; for i in "$@"; do echo "z${i}z"; done' 'zz zz'
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check 'set "" ""; for i in $@; do echo "z${i}z"; done' ''
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check 'set "a b" c; for i; do echo "z${i}z"; done' 'za bz zcz'
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check 'set "a b" c; for i in "$@"; do echo "z${i}z"; done' 'za bz zcz'
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check 'set "a b" c; for i in $@; do echo "z${i}z"; done' 'zaz zbz zcz'
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check 'set " a b " c; for i in "$@"; do echo "z${i}z"; done' 'z a b z zcz'
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check 'set --; for i in x"$@"x; do echo "z${i}z"; done' 'zxxz'
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check 'set a; for i in x"$@"x; do echo "z${i}z"; done' 'zxaxz'
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check 'set a b; for i in x"$@"x; do echo "z${i}z"; done' 'zxaz zbxz'
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}
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atf_test_case ifs
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ifs_head() {
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atf_set "descr" "Checks that IFS correctly configures field" \
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"splitting behavior"
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}
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ifs_body() {
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unset x
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# Some IFS tests
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check 't="-- "; IFS=" "; set $t; IFS=":"; r="$*"; IFS=; echo $# $r' '0'
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check 't=" x"; IFS=" x"; set $t; IFS=":"; r="$*"; IFS=; echo $# $r' '1'
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check 't=" x "; IFS=" x"; set $t; IFS=":"; r="$*"; IFS=; echo $# $r' '1'
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check 't=axb; IFS="x"; set $t; IFS=":"; r="$*"; IFS=; echo $# $r' '2 a:b'
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check 't="a x b"; IFS="x"; set $t; IFS=":"; r="$*"; IFS=; echo $# $r' '2 a : b'
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check 't="a xx b"; IFS="x"; set $t; IFS=":"; r="$*"; IFS=; echo $# $r' '3 a :: b'
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check 't="a xx b"; IFS="x "; set $t; IFS=":"; r="$*"; IFS=; echo $# $r' '3 a::b'
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# A recent 'clarification' means that a single trailing IFS non-whitespace
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# doesn't generate an empty parameter
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check 't="xax"; IFS="x"; set $t; IFS=":"; r="$*"; IFS=; echo $# $r' '2 :a'
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check 't="xax "; IFS="x "; set $t; IFS=":"; r="$*"; IFS=; echo $# $r' '2 :a'
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# Verify that IFS isn't being applied where it shouldn't be.
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check 'IFS="x"; set axb; IFS=":"; r="$*"; IFS=; echo $# $r' '1 axb'
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}
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atf_test_case var_length
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var_length_head() {
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atf_set "descr" "Checks that field splitting works when expanding" \
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"a variable's length"
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}
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var_length_body() {
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unset x
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# Check that we apply IFS to ${#var}
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long=12345678123456781234567812345678
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long=$long$long$long$long
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check 'echo ${#long}; IFS=2; echo ${#long}; set 1 ${#long};echo $#' '128 1 8 3'
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check 'IFS=2; set ${x-${#long}}; IFS=" "; echo $* $#' '1 8 2'
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check 'IFS=2; set ${x-"${#long}"}; IFS=" "; echo $* $#' '128 1'
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}
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atf_init_test_cases() {
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atf_add_test_case for
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atf_add_test_case default_val
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atf_add_test_case ifs_alpha
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atf_add_test_case quote
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atf_add_test_case dollar_at
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atf_add_test_case ifs
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atf_add_test_case var_length
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}
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