Add missing test file.

test/broker/07-will-delay-invalid-573191.py

@@ -0,0 +1,32 @@
+#!/usr/bin/env python3
+
+# Test for https://bugs.eclipse.org/bugs/show_bug.cgi?id=573191
+# Check under valgrind/asan for leaks.
+
+from mosq_test_helper import *
+
+def do_test():
+    rc = 1
+    keepalive = 60
+
+    mid = 1
+    props = mqtt5_props.gen_uint32_prop(mqtt5_props.PROP_WILL_DELAY_INTERVAL, 3)
+    connect_packet = mosq_test.gen_connect("will-573191-test", keepalive=keepalive, proto_ver=5, will_topic="", will_properties=props)
+    connack_packet = b""
+
+    port = mosq_test.get_port()
+    broker = mosq_test.start_broker(filename=os.path.basename(__file__), port=port)
+
+    try:
+        sock = mosq_test.do_client_connect(connect_packet, connack_packet, timeout=30, port=port)
+        sock.close()
+        rc = 0
+    finally:
+        broker.terminate()
+        broker.wait()
+        (stdo, stde) = broker.communicate()
+        if rc:
+            print(stde.decode('utf-8'))
+            exit(rc)
+
+do_test()