From 69899fd87cacb3962889f5a23deb1af07b0bed3a Mon Sep 17 00:00:00 2001
From: Rick Harris <rick.harris@rackspace.com>
Date: Thu, 17 Feb 2011 07:29:50 +0000
Subject: [PATCH] Adding tests

---
 nova/tests/test_xenapi.py  | 70 ++++++++++++++++++++++++++++++++++++--
 nova/tests/xenapi/stubs.py | 10 ++++++
 2 files changed, 77 insertions(+), 3 deletions(-)

diff --git a/nova/tests/test_xenapi.py b/nova/tests/test_xenapi.py
index 75387e7f..f8a3d72c 100644
--- a/nova/tests/test_xenapi.py
+++ b/nova/tests/test_xenapi.py
@@ -31,6 +31,7 @@ from nova.compute import power_state
 from nova.virt import xenapi_conn
 from nova.virt.xenapi import fake as xenapi_fake
 from nova.virt.xenapi import volume_utils
+from nova.virt.xenapi import vm_utils
 from nova.virt.xenapi.vmops import SimpleDH
 from nova.tests.db import fakes as db_fakes
 from nova.tests.xenapi import stubs
@@ -162,6 +163,7 @@ class XenAPIVMTestCase(test.TestCase):
         stubs.stubout_session(self.stubs, stubs.FakeSessionForVMTests)
         stubs.stubout_get_this_vm_uuid(self.stubs)
         stubs.stubout_stream_disk(self.stubs)
+        stubs.stubout_lookup_image(self.stubs)
         glance_stubs.stubout_glance_client(self.stubs,
                                            glance_stubs.FakeGlance)
         self.conn = xenapi_conn.get_connection(False)
@@ -277,15 +279,17 @@ class XenAPIVMTestCase(test.TestCase):
 
     def test_spawn_raw_glance(self):
         FLAGS.xenapi_image_service = 'glance'
-        self._test_spawn(1, None, None)
+        self._test_spawn(glance_stubs.FakeGlance.IMAGE_RAW, None, None)
 
     def test_spawn_vhd_glance(self):
         FLAGS.xenapi_image_service = 'glance'
-        self._test_spawn(4, None, None)
+        self._test_spawn(glance_stubs.FakeGlance.IMAGE_VHD, None, None)
 
     def test_spawn_glance(self):
         FLAGS.xenapi_image_service = 'glance'
-        self._test_spawn(1, 2, 3)
+        self._test_spawn(glance_stubs.FakeGlance.IMAGE_MACHINE,
+                         glance_stubs.FakeGlance.IMAGE_KERNEL,
+                         glance_stubs.FakeGlance.IMAGE_RAMDISK)
 
     def tearDown(self):
         super(XenAPIVMTestCase, self).tearDown()
@@ -334,3 +338,63 @@ class XenAPIDiffieHellmanTestCase(test.TestCase):
 
     def tearDown(self):
         super(XenAPIDiffieHellmanTestCase, self).tearDown()
+
+
+class XenAPIDetermineDiskImageTestCase(test.TestCase):
+    """
+    Unit tests for code that detects the ImageType
+    """
+    def setUp(self):
+        super(XenAPIDetermineDiskImageTestCase, self).setUp()
+        glance_stubs.stubout_glance_client(self.stubs,
+                                           glance_stubs.FakeGlance)
+
+        class FakeInstance(object):
+            pass
+
+        self.fake_instance = FakeInstance()
+        self.fake_instance.id = 42
+
+    def assert_disk_type(self, disk_type):
+        dt = vm_utils.VMHelper.determine_disk_image_type(
+            self.fake_instance)
+        self.assertEqual(disk_type, dt)
+
+    def test_instance_disk(self):
+        """
+        If a kernel is specified then the image type is DISK (aka machine)
+        """
+        FLAGS.xenapi_image_service = 'objectstore'
+        self.fake_instance.image_id = glance_stubs.FakeGlance.IMAGE_MACHINE
+        self.fake_instance.kernel_id = glance_stubs.FakeGlance.IMAGE_KERNEL
+        self.assert_disk_type(vm_utils.ImageType.DISK)
+
+    def test_instance_disk_raw(self):
+        """
+        If the kernel isn't specified, and we're not using Glance, then
+        DISK_RAW is assumed.
+        """
+        FLAGS.xenapi_image_service = 'objectstore'
+        self.fake_instance.image_id = glance_stubs.FakeGlance.IMAGE_RAW
+        self.fake_instance.kernel_id = None
+        self.assert_disk_type(vm_utils.ImageType.DISK_RAW)
+
+    def test_glance_disk_raw(self):
+        """
+        If we're using Glance, then defer to the image_type field, which in
+        this case will be 'raw'.
+        """
+        FLAGS.xenapi_image_service = 'glance'
+        self.fake_instance.image_id = glance_stubs.FakeGlance.IMAGE_RAW
+        self.fake_instance.kernel_id = None
+        self.assert_disk_type(vm_utils.ImageType.DISK_RAW)
+
+    def test_glance_disk_vhd(self):
+        """
+        If we're using Glance, then defer to the image_type field, which in
+        this case will be 'vhd'.
+        """
+        FLAGS.xenapi_image_service = 'glance'
+        self.fake_instance.image_id = glance_stubs.FakeGlance.IMAGE_VHD
+        self.fake_instance.kernel_id = None
+        self.assert_disk_type(vm_utils.ImageType.DISK_VHD)
diff --git a/nova/tests/xenapi/stubs.py b/nova/tests/xenapi/stubs.py
index 2e3b62a7..1e6758a3 100644
--- a/nova/tests/xenapi/stubs.py
+++ b/nova/tests/xenapi/stubs.py
@@ -130,6 +130,16 @@ def stubout_stream_disk(stubs):
     stubs.Set(vm_utils, '_stream_disk', f)
 
 
+def stubout_lookup_image(stubs):
+    @classmethod
+    def fake_lookup_image(cls, session, instance_id, vdi_ref):
+        # NOTE(sirp): pretending each image is paravirtualized for now
+        is_pv = True
+        return is_pv
+
+    stubs.Set(vm_utils.VMHelper, 'lookup_image', fake_lookup_image)
+
+
 class FakeSessionForVMTests(fake.SessionBase):
     """ Stubs out a XenAPISession for VM tests """
     def __init__(self, uri):