emergency save.

test/mtt_tc.py

@@ -1,6 +1,6 @@
 """Base for MoreThanTest test cases."""
 
-from asyncio import create_subprocess_exec, sleep
+from asyncio import create_subprocess_exec, gather, sleep
 from pathlib import Path
 from socket import socket
 from unittest import IsolatedAsyncioTestCase
@@ -87,6 +87,19 @@ class MTTClusterTC(IsolatedAsyncioTestCase):
         port = await self.get_port()
         await self.create_server_with_flags("-p", str(port))
 
+    async def create_cluster(self, num=2):
+        """Create a cluster of servers."""
+        ports = []
+        while len(ports) < num:
+            port = await self.get_port()
+            if port not in ports:
+                ports.append(port)
+        servers = []
+        for port in ports:
+            servers.append(self.create_server_with_flags("-p", str(port)))
+        cluster = gather(*servers)
+        await cluster
+
     async def run_tests(self, uri, func):
         """Run the tests on each server."""
         for server in self.servers:

test/test_single_boot.py

@@ -85,3 +85,15 @@ class BootUpTC(MTTClusterTC):
             ) as response:
                 self.assertIn(SESSION_KEY, response.cookies)
                 self.assertNotEqual(response.cookies[SESSION_KEY].value, value)
+
+    async def test_sessions_are_shared_between_servers(self):
+        """Does the session apply to the cluster."""
+        await self.create_cluster()
+        ids = []
+
+        def tests(response):
+            if SESSION_KEY in response.cookies:
+                ids.append(response.cookies[SESSION_KEY].value)
+
+        await self.run_tests("/", tests)
+        self.assertEqual(len(ids), 1, "Session info should be shared to the cluster.")