add test cases for `trap` ... but disabled for now until trap support is committed
diff --git a/shell/hush_test/hush-trap/usage.tests b/shell/hush_test/hush-trap/usage.tests
new file mode 100644
index 0000000..d29c6e7
--- /dev/null
+++ b/shell/hush_test/hush-trap/usage.tests
@@ -0,0 +1,23 @@
+# no output -- default state
+echo ___
+trap
+
+# assign some traps
+echo ___
+trap "a" EXIT INT USR1 USR2
+
+# show them all
+echo ___
+trap
+
+# clear one
+echo ___
+trap 0 INT
+echo ___
+trap
+
+# clear another
+echo ___
+trap "-" USR1
+echo ___
+trap