1 files changed, 13 insertions, 0 deletions
diff --git a/tests/sub b/tests/sub
new file mode 100644
index 0000000..b662429
--- /dev/null
+++ b/tests/sub
@@ -0,0 +1,13 @@
+#!/bin/sh
+
+newval=$(echo "abc" | sed 's/[bc]/d/g')
+
+case "${newval}" in
+  (add)
+  echo "sub: OK"
+  ;;
+  (*)
+  echo >&2 "unexpected result (${newval}): failure"
+  exit 1
+  ;;
+esac