ash: import param_expand_default.tests from hush

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>

2 files changed, 30 insertions, 0 deletions

diff --git a/shell/ash_test/ash-vars/param_expand_default.right b/shell/ash_test/ash-vars/param_expand_default.right
new file mode 100644
index 000000000..3eecd1375
--- /dev/null
+++ b/shell/ash_test/ash-vars/param_expand_default.right
@@ -0,0 +1,7 @@
+SHELL: line 1: syntax error: bad substitution
+_0 _0
+_ _ _ _word _word
+_aaaa _aaaa _aaaa _aaaa _aaaa
+_ _ _ _word _word
+_ _ _ _ _word
+_fff _fff _fff _fff _fff
diff --git a/shell/ash_test/ash-vars/param_expand_default.tests b/shell/ash_test/ash-vars/param_expand_default.tests
new file mode 100755
index 000000000..5e42d30e3
--- /dev/null
+++ b/shell/ash_test/ash-vars/param_expand_default.tests
@@ -0,0 +1,23 @@
+# first try some invalid patterns (do in subshell due to parsing error)
+# (set argv0 to "SHELL" to avoid "/path/to/shell: blah" in error messages)
+# valid in bash and ash (same as $-): "$THIS_SH" -c 'echo ${-}' SHELL
+"$THIS_SH" -c 'echo ${:-}' SHELL
+
+# now some funky ones
+echo _${#-} _${#:-}
+
+# 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}