ISSU tests
Change-Id: I88a172c6a147c2070d829861bad7e6656d3538ba
diff --git a/TestON/tests/HA/HAupgrade/README b/TestON/tests/HA/HAupgrade/README
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+This test is designed to verify that an ONOS cluster behaves correctly when some
+ONOS nodes are upgrade. Then test will initilize the upgrade then stop, upgrade,
+and restart a minority of the nodes in the cluster. Then we will start the first
+phase of the upgrade process to transfer to the new version. Then we will upgrade
+and restart the rest of the cluster. After that the test will verify everything
+works and commit the upgrade.
+
+As written, the test only supports an ONOS cluster of 3, 5, or 7 nodes.
+This is because the test doesn't apply to a single node cluster and ONOS clusters
+should be deployed in odd numbers.
+
+The gerneral structure for the test:
+- Startup
+- Assign switches
+- Verify ONOS state and functionality
+ - Device mastership
+ - Intents
+ - Leadership election
+ - Distributed Primitives
+- Initialize an upgrade
+- Upgrade some ONOS nodes
+- Verify ONOS state and functionality
+- Transfer to new version
+- Upgrade the rest of the nodes
+- Verify ONOS state and functionality
+- Commit the upgrade
+- Dataplane failures
+ - link down and up
+ - switch down and up