From b3817bc521683faf3a181ed34f8252807adf3858 Mon Sep 17 00:00:00 2001
From: Sam Thursfield <sam.thursfield@codethink.co.uk>
Date: Tue, 18 Feb 2014 18:49:28 +0000
Subject: Add kernel upgrade test

---
 test_trove_upgrades.py | 86 +++++++++++++++++++++++++++++++++++++++++++++++++-
 1 file changed, 85 insertions(+), 1 deletion(-)

diff --git a/test_trove_upgrades.py b/test_trove_upgrades.py
index 75580e2..111bde4 100644
--- a/test_trove_upgrades.py
+++ b/test_trove_upgrades.py
@@ -650,6 +650,89 @@ class TestUpgrades(BaseTestSuite):
                 #   check you can issue Gitano commands ...
                 #     perhaps crib from Gitano test suite
 
+    @contextlib.contextmanager
+    def given_trove_instance_with_old_kernel(self, vm_name, fixture_dir, reuse=False):
+        '''
+        GIVEN a running current Trove system but with Linux 3.6
+        '''
+        if reuse:
+            branch = SystemTestBranch(fixture_dir, 'old')
+            instance = TroveInitialDeployment(branch, vm_name)
+            instance.admin_id = os.path.join(branch.morphs_dir, 'testuser.key')
+        else:
+            branch = self.create_system_branch(fixture_dir, 'old')
+            branch.set_chunk_version(
+                    system='trove-system-x86_64', stratum='bsp-x86_64-generic',
+                    chunk='linux', tag='v3.6')
+
+            instance = TroveInitialDeployment(branch, vm_name)
+            instance.create_config()
+            instance.run_build()
+            instance.run_deploy(autostart=True)
+
+        cliapp.runcmd(['ssh-add', instance.admin_id])
+
+        try:
+            self.wait_for_machine_to_boot(instance)
+
+            yield instance
+        finally:
+            # Should pass the .pub file really ...
+            cliapp.runcmd(['ssh-add', '-d', instance.admin_id])
+
+    def test_scenario_trove_kernel_upgrade(self, vm_name, fixture_dir,
+            workspace_dir, reuse_fixture=False):
+        '''
+        The kernel requires special treatment by the upgrade mechanism because
+        it is the first thing that loads.
+
+        SCENARIO Bob upgrades his Trove (vague version)
+        GIVEN a Trove system with Linux 3.6
+        WHEN Bob builds and upgrades to the current version of Trove with
+          AUTOSTART=1
+        THEN the Trove uses the standard version of Linux used Baserock master
+
+        '''
+
+        with self.given_trove_instance_with_old_kernel(
+                vm_name, fixture_dir, reuse=reuse_fixture) as instance:
+            branch = self.create_system_branch(workspace_dir, 'current')
+
+            test_url = 'ssh://root@%s/' % vm_name
+
+            old_uname_output = remote_runcmd(
+                    test_url, ['uname', '--kernel-release'])
+            print "uname output: %s" % old_uname_output
+
+            upgrade = TroveUpgrade(branch, vm_name)
+            upgrade.create_config(instance, upgrade_method='ssh-rsync',
+                    version_label='trove-current')
+            upgrade.run_build()
+            upgrade.run_deploy(autostart=True)
+
+            self.wait_for_machine_to_boot(instance)
+
+            new_uname_output = remote_runcmd(
+                    test_url, ['uname', '--kernel-release'])
+            print "uname output: %s" % new_uname_output
+
+            try:
+                remote_runcmd(test_url,
+                        ['snapshot-mgr', 'set-default', 'factory'])
+                remote_runcmd(test_url, ['reboot'])
+            except cliapp.AppException:
+                # Bit of a hack because we get disconnect before the command
+                # exits so SSH returns failure.
+                pass
+
+            self.wait_for_machine_to_boot(instance)
+            rollback_uname_output = remote_runcmd(
+                    test_url, ['uname', '--kernel-release'])
+
+            print "OLD uname outout: %s" % old_uname_output
+            print "NEW uname outout: %s" % new_uname_output
+            print "RBK uname output: %s" % rollback_uname_output
+
     def test_scenario_trove_upgrade_shared_user_data(
             self, vm_name, fixture_dir, workspace_dir, reuse_fixture=False):
         '''
@@ -755,7 +838,8 @@ class SimpleTestRunner(cliapp.Application):
         self.run_test()
 
     def run_test(self):
-        test = TestUpgrades().test_scenario_trove_upgrade
+        #test = TestUpgrades().test_scenario_trove_upgrade
+        test = TestUpgrades().test_scenario_trove_kernel_upgrade
 
         if self.settings['reuse-fixture'] is not None:
             fixture_dir = self.settings['reuse-fixture']
-- 
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