# Test expansion of variables

# We don't use the test utility function of the same name because we want
# different behavior. Specifically, that the expansion of any variables or
# other strings before we are invoked produce the expected expansion.
function expansion --description 'Prints argument count followed by arguments'
    echo (count $argv) $argv
end

set -l foo
expansion "$foo"
expansion $foo
expansion "prefix$foo"
expansion prefix$foo

expansion "$$foo"
expansion $$foo
expansion "prefix$$foo"
expansion prefix$$foo

set -l foo ''
expansion "$foo"
expansion $foo
expansion "prefix$foo"
expansion prefix$foo

expansion "$$foo"
expansion $$foo
expansion "prefix$$foo"
expansion prefix$$foo

set -l foo bar
set -l bar
expansion "$$foo"
expansion $$foo
expansion "prefix$$foo"
expansion prefix$$foo

set -l bar baz
expansion "$$foo"
expansion $$foo
expansion "prefix$$foo"
expansion prefix$$foo

set -l bar baz quux
expansion "$$foo"
expansion $$foo
expansion "prefix$$foo"
expansion prefix$$foo

set -l foo bar fooer fooest
set -l fooer
set -l fooest
expansion "$$foo"
expansion $$foo
expansion "prefix$$foo"
expansion prefix$$foo

set -l fooer ''
expansion $$foo
expansion prefix$$foo

set -l foo bar '' fooest
expansion "$$foo"
expansion $$foo
expansion "prefix$$foo"
expansion prefix$$foo
expansion $foo[-5..2] # No result, because the starting index is invalid and we force-reverse.
expansion $foo[-2..-1]
expansion $foo[-10..-5]
expansion (printf '%s\n' $foo)[-5..2]
expansion (printf '%s\n' $foo)[-2..-1]
expansion (printf '%s\n' $foo)[-10..-5]

set -l foo
expansion "$foo[1]"
expansion $foo[1]
expansion "$foo[-1]"
expansion $foo[-1]
expansion "$foo[2]"
expansion $foo[2]
expansion "$foo[1 2]"
expansion $foo[1 2]
expansion "$foo[2 1]"
expansion $foo[2 1]
set -l foo a b c
expansion $foo[17]
expansion $foo[-17]
expansion $foo[17..18]
expansion $foo[4..-2]

echo "$foo[d]"
echo $foo[d]

echo ()[1]
echo ()[d]

logmsg Catch your breath
set paren ')'
echo $$paren

logmsg Test tilde expansion
# On OS X, /tmp is symlinked to /private/tmp
# $PWD is our best bet for resolving it
set -l saved $PWD
cd (mktemp -d)
set tmpdir $PWD
cd $saved
mkdir $tmpdir/realhome
ln -s $tmpdir/realhome $tmpdir/linkhome
set expandedtilde (env HOME=$tmpdir/linkhome ../test/root/bin/fish -c 'echo ~')
if test $expandedtilde != $tmpdir/realhome
	echo '~ expands to' $expandedtilde ' - expected ' $tmpdir/realhome
end
unlink $tmpdir/linkhome
rmdir $tmpdir/realhome
rmdir $tmpdir