add test cases for parameter substitution with unset/null strings

2 files changed, 38 insertions, 0 deletions

diff --git a/shell/hush_test/hush-vars/var_posix1.right b/shell/hush_test/hush-vars/var_posix1.right
index 55f35798a..702bbca79 100644
--- a/shell/hush_test/hush-vars/var_posix1.right
+++ b/shell/hush_test/hush-vars/var_posix1.right
@@ -1,3 +1,19 @@
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
 abcdcd
 abcdcd
 abcdcd
diff --git a/shell/hush_test/hush-vars/var_posix1.tests b/shell/hush_test/hush-vars/var_posix1.tests
index 4139e2cc3..d3205b119 100755
--- a/shell/hush_test/hush-vars/var_posix1.tests
+++ b/shell/hush_test/hush-vars/var_posix1.tests
@@ -1,3 +1,25 @@
+unset var
+
+echo ${var#}
+echo ${var##}
+echo ${var#*}
+echo ${var##*}
+echo ${var%}
+echo ${var%%}
+echo ${var%*}
+echo ${var%%*}
+
+var=
+
+echo ${var#}
+echo ${var##}
+echo ${var#*}
+echo ${var##*}
+echo ${var%}
+echo ${var%%}
+echo ${var%*}
+echo ${var%%*}
+
 var=ababcdcd
 
 echo ${var#ab}