Add mixed-cluster config + helper script + upgrade test

rtdev-current.sh

@@ -0,0 +1,13 @@
+cwd=$(pwd)
+cd /tmp/rt
+git reset HEAD --hard
+git clean -fd
+rm -rf /tmp/rt/current
+mkdir /tmp/rt/current
+cd $cwd
+cp -a dev /tmp/rt/current
+cd /tmp/rt
+git add .
+git commit -a -m "riak_test init" --amend
+
+

rtdev-mixed.config

@@ -0,0 +1,10 @@
+{rt_deps, ["/Users/jtuple/basho/CLEAN2/riak/deps"]}.
+{rt_max_wait_time, 180000}.
+{rt_retry_delay, 500}.
+{rt_harness, rtdev}.
+{rtdev_path, [{root, "/tmp/rt"},
+              {current, "/tmp/rt/current"},
+              {"1.1.2", "/tmp/rt/riak-1.1.2"},
+              {"1.0.3", "/tmp/rt/riak-1.0.3"},
+              {"0.14.2", "/tmp/rt/riak-0.14.2"}]}.
+

tests/upgrade.erl

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+-module(upgrade).
+-export([upgrade/0]).
+-include_lib("eunit/include/eunit.hrl").
+
+upgrade() ->
+    Nodes = rt:build_cluster(4, ["1.0.3", "1.0.3", "1.1.2", current]),
+    [Node1, Node2, Node3, _Node4] = Nodes,
+
+    lager:info("Writing 100 keys"),
+    rt:systest_write(Node1, 100, 3),
+    ?assertEqual([], rt:systest_read(Node1, 100, 1)),
+    rtdev:upgrade(Node1, "1.1.2"),
+    lager:info("Ensuring keys still exist"),
+    rt:stop(Node2),
+    rt:stop(Node3),
+    rt:systest_read(Node1, 100, 1),
+    ?assertEqual([], rt:systest_read(Node1, 100, 1)),
+    ok.
+    
+