1 files changed, 48 insertions, 0 deletions
diff --git a/test/interop/overlapping_subscriptions_test.c b/test/interop/overlapping_subscriptions_test.c
new file mode 100644
index 0000000..c6e5da0
--- /dev/null
+++ b/test/interop/overlapping_subscriptions_test.c
@@ -0,0 +1,48 @@
+#include "greatest.h"
+#include "testclient.h"
+#include "cleanup.c"
+#include "topics.c"
+
+TEST overlapping_subscriptions_test()
+{
+    TestClient *client;
+    int count;
+
+    client = TestClientNew("clienta");
+    ASSERT(TestClientConnect(client, "localhost", 1883, 60, 1));
+    ASSERT(TestClientSubscribe(client, wildtopics[6], 2));
+    ASSERT(TestClientSubscribe(client, wildtopics[0], 1));
+    ASSERT(TestClientPublish(client, 2, 0, topics[3],
+                             "overlapping topic filters"));
+    ASSERT(TestClientWait(client, 1000));
+    TestClientDisconnect(client);
+    count = TestClientMessageCount(client);
+    ASSERT(count == 1 || count == 2);
+    if (count == 1)
+    {
+        printf("this server sends one message for for all matching "
+               "overlapping subscriptions, not one for each\n");
+        ASSERT_EQ(2, SIMPLEQ_FIRST(&client->messages)->qos);
+    }
+    else
+    {
+        printf("this server sends one message per each matching overlapping "
+               "subscription\n");
+        int qos1 = SIMPLEQ_FIRST(&client->messages)->qos;
+        int qos2 = SIMPLEQ_NEXT(SIMPLEQ_FIRST(&client->messages), chain)->qos;
+        ASSERT((qos1 == 1 && qos2 == 2) || (qos1 == 2 && qos2 == 1));
+    }
+    TestClientFree(client);
+
+    PASS();
+}
+
+GREATEST_MAIN_DEFS();
+
+int main(int argc, char **argv)
+{
+    GREATEST_MAIN_BEGIN();
+    cleanup();
+    RUN_TEST(overlapping_subscriptions_test);
+    GREATEST_MAIN_END();
+}