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|
# Tests for command substitution.
%prep
mkdir cmdsubst.tmp
touch cmdsubst.tmp/file{1,2}.txt
%test
foo="two words"
print -l `echo $foo bar`
0:Basic `...` substitution
>two
>words
>bar
foo="two words"
print -l $(echo $foo bar)
0:Basic $(...) substitution
>two
>words
>bar
foo='intricate buffoonery'
print -l "`echo $foo and licentiousness`"
0:Quoted `...` substitution
>intricate buffoonery and licentiousness
foo="more words"
print -l "$(echo $foo here)"
0:Quoted $(...) substitution
>more words here
# we used never to get this one right, but I think it is now...
print -r "`print -r \\\\\\\\`"
0:Stripping of backslasshes in quoted `...`
>\\
print -r "$(print -r \\\\\\\\)"
0:Stripping of backslashes in quoted $(...)
>\\\\
fnify() { print \"$*\"; }
print `fnify \`fnify understatement\``
0:Nested `...`
>""understatement""
print $(fnify $(fnify overboard))
0:Nested $(...)
>""overboard""
fructify() { print \'$*\'; }
print "`fructify \`fructify indolence\``"
0:Nested quoted `...`
>''indolence''
print "$(fructify $(fructify obtuseness))"
0:Nested quoted $(...)
>''obtuseness''
gesticulate() { print \!$*\!; }
print $((gesticulate wildly); gesticulate calmly)
0:$(( ... ) ... ) is not arithmetic
>!wildly! !calmly!
commencify() { print +$*+; }
print "$((commencify output); commencify input)"
0:quoted $(( ... ) .. ) is not arithmetic
>+output+
>+input+
(
cd cmdsubst.tmp
print first: ${$(print \*)}
print second: ${~$(print \*)}
print third: ${$(print *)}
print fourth: "${~$(print \*)}"
print fifth: ${~"$(print \*)"}
)
0:mixing $(...) with parameter substitution and globbing
>first: *
>second: file1.txt file2.txt
>third: file1.txt file2.txt
>fourth: *
>fifth: file1.txt file2.txt
$(exit 0) $(exit 3) || print $?
0:empty command uses exit value of last substitution
>3
X=$(exit 2) $(exit 0) || print $?
0:variable assignments processed after other substitutions
>2
false
``
0:Empty command substitution resets status
false
echo `echo $?`
0:Non-empty command substitution inherits status
>1
echo $(( ##\" ))
echo $(echo \")
echo $((echo \"); echo OK)
0:Handling of backslash double quote in parenthesised substitutions
>34
>"
>" OK
echo $(case foo in
foo)
echo This test worked.
;;
bar)
echo This test failed in a rather bizarre way.
;;
*)
echo This test failed.
;;
esac)
0:Parsing of command substitution with unmatched parentheses: case, basic
>This test worked.
echo "$(case bar in
foo)
echo This test spoobed.
;;
bar)
echo This test plurbled.
;;
*)
echo This test bzonked.
;;
esac)"
0:Parsing of command substitution with unmatched parentheses: case with quotes
>This test plurbled.
echo before $(
echo start; echo unpretentious |
while read line; do
case $line in
u*)
print Word began with u
print and ended with a crunch
;;
esac
done | sed -e 's/Word/Universe/'; echo end
) after
0:Parsing of command substitution with ummatched parentheses: with frills
>before start Universe began with u and ended with a crunch end after
alias foo='echo $('
eval 'foo echo this just works, OK\?)'
0:backtracking within command string parsing with alias still pending
>this just works, OK?
(
set errexit
show_nargs() { print $#; }
print a $() b
print c "$()" d
)
0:Empty $() is a valid empty substitution.
>a b
>c d
empty=$() && print "'$empty'"
0:Empty $() is a valid assignment
>''
(
setopt ignoreclosebraces
alias OPEN='{' CLOSE='};'
eval '{ OPEN print hi; CLOSE }
var=$({ OPEN print bye; CLOSE}) && print $var'
)
0:Alias expansion needed in parsing substitutions
>hi
>bye
# This should silently print a blank line; the original problem was
# a parse error as the last character of the unexpanded alias
# was erased, symptom: "command not found: W"
alias WI='while {false}'
eval 'echo $(WI blah)'
0:Aliases with braces in command substitution can cause havoc
>
|
