SERVER-15319 Multiversion test for freelist upgrade-downgrade

1 files changed, 57 insertions, 0 deletions

diff --git a/jstests/multiVersion/new_freelist_upgrade_downgrade.js b/jstests/multiVersion/new_freelist_upgrade_downgrade.js
new file mode 100644
index 00000000000..ff364baeb35
--- /dev/null
+++ b/jstests/multiVersion/new_freelist_upgrade_downgrade.js
@@ -0,0 +1,57 @@
+// SERVER-15319 Make sure pdfile version bumping for the new freelist works as intended
+
+var tooOld = "2.4"; // anything <= 2.6.4
+var newEnough = "2.6"; // latest in 2.6 is >= 2.6.5
+var latest = "latest";
+
+function restart(conn, version) {
+    MongoRunner.stopMongod(conn);
+    return MongoRunner.runMongod({restart: conn, remember: true, binVersion: version});
+}
+
+function repair(conn, version) {
+    MongoRunner.stopMongod(conn);
+    MongoRunner.runMongod({restart: conn, remember: true, binVersion: version, repair: ""});
+}
+
+
+// start out running tooOld
+var conn = MongoRunner.runMongod({ remember: true, binVersion: tooOld, smallfiles: "" });
+assert(conn);
+
+// can go from tooOld to newEnough
+conn = restart(conn, newEnough);
+assert(conn);
+
+// can go from newEnough to tooOld
+conn = restart(conn, tooOld);
+assert(conn);
+
+// can go from tooOld to latest
+conn = restart(conn, latest);
+assert(conn);
+
+// can go from latest to newEnough
+conn = restart(conn, newEnough);
+assert(conn);
+
+// can't go back to tooOld once started with latest, even if started with newEnough in between.
+assert.isnull(restart(conn, tooOld));
+
+// can still start with newEnough
+conn = restart(conn, newEnough);
+assert(conn);
+
+// can still start with latest
+conn = restart(conn, latest);
+assert(conn);
+
+// can repair with newEnough
+repair(conn, newEnough);
+
+// can start with tooOld after repairing with newEnough
+conn = restart(conn, tooOld);
+assert(conn);
+
+// THIS MUST BE THE LAST LINE
+MongoRunner.stopMongod(conn);