add hush tests for parameter expansion

shell/hush_test/hush-vars/param_expand_alt.right

@@ -0,0 +1,8 @@
+hush: syntax error: unterminated ${name}
+hush: syntax error: unterminated ${name}
+_0 _0
+_ _ _ _ _
+_aaaa _ _ _word _word
+_ _ _ _ _
+_ _ _ _word _
+_fff _ _ _word _word

shell/hush_test/hush-vars/param_expand_alt.tests

@@ -0,0 +1,22 @@
+# first try some invalid patterns (do in subshell due to parsing error)
+hush -c 'echo ${+}  ; echo moo'
+hush -c 'echo ${:+} ; echo moo'
+
+# now some funky ones
+echo _${#+} _${#:+}
+
+# now some valid ones
+set --
+echo _$1 _${1+} _${1:+} _${1+word} _${1:+word}
+
+set -- aaaa
+echo _$1 _${1+} _${1:+} _${1+word} _${1:+word}
+
+unset f
+echo _$f _${f+} _${f:+} _${f+word} _${f:+word}
+
+f=
+echo _$f _${f+} _${f:+} _${f+word} _${f:+word}
+
+f=fff
+echo _$f _${f+} _${f:+} _${f+word} _${f:+word}

shell/hush_test/hush-vars/param_expand_assign.right

@@ -0,0 +1,27 @@
+hush: syntax error: unterminated ${name}
+hush: syntax error: unterminated ${name}
+0
+0
+hush: 1: special vars cannot assign in this way
+hush: 1: special vars cannot assign in this way
+hush: 1: special vars cannot assign in this way
+hush: 1: special vars cannot assign in this way
+_aa
+_aa
+_aa
+_aa
+_
+_
+_
+_word
+_word
+_
+_
+_
+_
+_word
+_fff
+_fff
+_fff
+_fff
+_fff

shell/hush_test/hush-vars/param_expand_assign.tests

@@ -0,0 +1,38 @@
+# first try some invalid patterns (do in subshell due to parsing error)
+hush -c 'echo ${=}'
+hush -c 'echo ${:=}'
+
+# now some funky ones
+hush -c 'echo ${#=}'
+hush -c 'echo ${#:=}'
+
+# should error out
+hush -c 'set --; echo _${1=}'
+hush -c 'set --; echo _${1:=}'
+hush -c 'set --; echo _${1=word}'
+hush -c 'set --; echo _${1:=word}'
+
+# should not error
+hush -c 'set aa; echo _${1=}'
+hush -c 'set aa; echo _${1:=}'
+hush -c 'set aa; echo _${1=word}'
+hush -c 'set aa; echo _${1:=word}'
+
+# should work fine
+unset f; echo _$f
+unset f; echo _${f=}
+unset f; echo _${f:=}
+unset f; echo _${f=word}
+unset f; echo _${f:=word}
+
+f=; echo _$f
+f=; echo _${f=}
+f=; echo _${f:=}
+f=; echo _${f=word}
+f=; echo _${f:=word}
+
+f=fff; echo _$f
+f=fff; echo _${f=}
+f=fff; echo _${f:=}
+f=fff; echo _${f=word}
+f=fff; echo _${f:=word}

shell/hush_test/hush-vars/param_expand_default.right

@@ -0,0 +1,8 @@
+hush: syntax error: unterminated ${name}
+hush: syntax error: unterminated ${name}
+_0 _0
+_ _ _ _word _word
+_aaaa _aaaa _aaaa _aaaa _aaaa
+_ _ _ _word _word
+_ _ _ _ _word
+_fff _fff _fff _fff _fff

shell/hush_test/hush-vars/param_expand_default.tests

@@ -0,0 +1,22 @@
+# first try some invalid patterns (do in subshell due to parsing error)
+hush -c 'echo ${-}'
+hush -c 'echo ${:-}'
+
+# now some funky ones
+echo _${#-} _${#:-}
+
+# now some valid ones
+set --
+echo _$1 _${1-} _${1:-} _${1-word} _${1:-word}
+
+set -- aaaa
+echo _$1 _${1-} _${1:-} _${1-word} _${1:-word}
+
+unset f
+echo _$f _${f-} _${f:-} _${f-word} _${f:-word}
+
+f=
+echo _$f _${f-} _${f:-} _${f-word} _${f:-word}
+
+f=fff
+echo _$f _${f-} _${f:-} _${f-word} _${f:-word}

shell/hush_test/hush-vars/param_expand_indicate_error.right

@@ -0,0 +1,29 @@
+hush: syntax error: unterminated ${name}
+hush: syntax error: unterminated ${name}
+0
+0
+_
+hush: 1: parameter null or not set
+hush: 1: parameter null or not set
+hush: 1: word
+hush: 1: word
+_aaaa
+_aaaa
+_aaaa
+_aaaa
+_aaaa
+_
+hush: f: parameter null or not set
+hush: f: parameter null or not set
+hush: f: word
+hush: f: word
+_
+_
+hush: f: parameter null or not set
+_
+hush: f: word
+_fff
+_fff
+_fff
+_fff
+_fff

shell/hush_test/hush-vars/param_expand_indicate_error.tests

@@ -0,0 +1,40 @@
+# do all of these in subshells since it's supposed to error out
+
+# first try some invalid patterns
+hush -c 'echo ${?}'
+hush -c 'echo ${:?}'
+
+# then some funky ones
+hush -c 'echo ${#?}'
+hush -c 'echo ${#:?}'
+
+# now some valid ones
+hush -c 'set --; echo _$1'
+hush -c 'set --; echo _${1?}'
+hush -c 'set --; echo _${1:?}'
+hush -c 'set --; echo _${1?word}'
+hush -c 'set --; echo _${1:?word}'
+
+hush -c 'set -- aaaa; echo _$1'
+hush -c 'set -- aaaa; echo _${1?}'
+hush -c 'set -- aaaa; echo _${1:?}'
+hush -c 'set -- aaaa; echo _${1?word}'
+hush -c 'set -- aaaa; echo _${1:?word}'
+
+hush -c 'unset f; echo _$f'
+hush -c 'unset f; echo _${f?}'
+hush -c 'unset f; echo _${f:?}'
+hush -c 'unset f; echo _${f?word}'
+hush -c 'unset f; echo _${f:?word}'
+
+hush -c 'f=; echo _$f'
+hush -c 'f=; echo _${f?}'
+hush -c 'f=; echo _${f:?}'
+hush -c 'f=; echo _${f?word}'
+hush -c 'f=; echo _${f:?word}'
+
+hush -c 'f=fff; echo _$f'
+hush -c 'f=fff; echo _${f?}'
+hush -c 'f=fff; echo _${f:?}'
+hush -c 'f=fff; echo _${f?word}'
+hush -c 'f=fff; echo _${f:?word}'

shell/hush_test/hush-vars/param_expand_len.right

@@ -0,0 +1,4 @@
+0 0
+4 4
+4 3 2 1 0 0
+0 3 0

shell/hush_test/hush-vars/param_expand_len.tests

@@ -0,0 +1,12 @@
+# make sure len parsing doesnt break arg count
+set --
+echo $# ${#}
+set -- aaaa bbb cc d
+echo $# ${#}
+
+echo ${#1} ${#2} ${#3} ${#4} ${#5} ${#6}
+
+unset e
+f=abc
+g=
+echo ${#e} ${#f} ${#g}