ash: add slightly different testcase

diff --git a/shell/ash_test/ash-signals/signal2.right b/shell/ash_test/ash-signals/signal2.right
index 96d2d6a..a2af919 100644
--- a/shell/ash_test/ash-signals/signal2.right
+++ b/shell/ash_test/ash-signals/signal2.right
@@ -1,3 +1,3 @@
-sleeping
+child sleeps
 child exits as expected
 parent exits
diff --git a/shell/ash_test/ash-signals/signal2.tests b/shell/ash_test/ash-signals/signal2.tests
index 04f981c..df639ca 100755
--- a/shell/ash_test/ash-signals/signal2.tests
+++ b/shell/ash_test/ash-signals/signal2.tests
@@ -6,7 +6,7 @@
     exit
 }
 trap cleanup HUP
-echo "sleeping"
+echo "child sleeps"
 sleep 1
 echo "BAD exit from child!"
 ' &
diff --git a/shell/ash_test/ash-signals/signal3.right b/shell/ash_test/ash-signals/signal3.right
new file mode 100644
index 0000000..3113ba5
--- /dev/null
+++ b/shell/ash_test/ash-signals/signal3.right
@@ -0,0 +1,4 @@
+child sleeps
+child got HUP
+child exits
+parent exits
diff --git a/shell/ash_test/ash-signals/signal3.tests b/shell/ash_test/ash-signals/signal3.tests
new file mode 100755
index 0000000..b56c2d9
--- /dev/null
+++ b/shell/ash_test/ash-signals/signal3.tests
@@ -0,0 +1,17 @@
+#!/bin/sh
+
+$THIS_SH -c '
+hup() {
+    echo "child got HUP"
+}
+trap hup HUP
+echo "child sleeps"
+sleep 1
+echo "child exits"
+' &
+
+child=$!
+sleep 0.1 # let child install handler first
+kill -HUP $child
+wait
+echo "parent exits"