Cluster test: unit 08, update messages.

tests/cluster/tests/08-update-msg.tcl

@@ -0,0 +1,90 @@
+# Test UPDATE messages sent by other nodes when the currently authorirative
+# master is unavaialble. The test is performed in the following steps:
+#
+# 1) Master goes down.
+# 2) Slave failover and becomes new master.
+# 3) New master is partitoned away.
+# 4) Old master returns.
+# 5) At this point we expect the old master to turn into a slave ASAP because
+#    of the UPDATE messages it will receive from the other nodes when its
+#    configuration will be found to be outdated.
+
+source "../tests/includes/init-tests.tcl"
+
+test "Create a 5 nodes cluster" {
+    create_cluster 5 5
+}
+
+test "Cluster is up" {
+    assert_cluster_state ok
+}
+
+test "Cluster is writable" {
+    cluster_write_test 0
+}
+
+test "Instance #5 is a slave" {
+    assert {[RI 5 role] eq {slave}}
+}
+
+test "Instance #5 synced with the master" {
+    wait_for_condition 1000 50 {
+        [RI 5 master_link_status] eq {up}
+    } else {
+        fail "Instance #5 master link status is not up"
+    }
+}
+
+set current_epoch [CI 1 cluster_current_epoch]
+
+test "Killing one master node" {
+    kill_instance redis 0
+}
+
+test "Wait for failover" {
+    wait_for_condition 1000 50 {
+        [CI 1 cluster_current_epoch] > $current_epoch
+    } else {
+        fail "No failover detected"
+    }
+}
+
+test "Cluster should eventually be up again" {
+    assert_cluster_state ok
+}
+
+test "Cluster is writable" {
+    cluster_write_test 1
+}
+
+test "Instance #5 is now a master" {
+    assert {[RI 5 role] eq {master}}
+}
+
+test "Killing the new master #5" {
+    kill_instance redis 5
+}
+
+test "Cluster should be down now" {
+    assert_cluster_state fail
+}
+
+test "Restarting the old master node" {
+    restart_instance redis 0
+}
+
+test "Instance #0 gets converted into a slave" {
+    wait_for_condition 1000 50 {
+        [RI 0 role] eq {slave}
+    } else {
+        fail "Old master was not converted into slave"
+    }
+}
+
+test "Restarting the new master node" {
+    restart_instance redis 5
+}
+
+test "Cluster is up again" {
+    assert_cluster_state ok
+}