2 files changed, 15 insertions, 0 deletions
diff --git a/tests/control b/tests/control
new file mode 100644
index 0000000..887bb55
--- /dev/null
+++ b/tests/control
@@ -0,0 +1,2 @@
+Tests: sub
+Depends: @
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