[Qemu-trivial] [PATCH] block: Adds mirroring tests for resized images

[Vishvananda Ishaya]

This test verifies two mirroring issues are fixed with resized images:

 * sync='top' creates an image that is the proper size
 * sync='full' doesn't cause an assertion failure and crash qemu
---
These are tests for my patches for the following bugs:

https://bugs.launchpad.net/qemu/+bug/1103868
https://bugs.launchpad.net/qemu/+bug/1103903

 tests/qemu-iotests/041     |   48 ++++++++++++++++++++++++++++++++++++++++++++
 tests/qemu-iotests/041.out |    4 ++--
 2 files changed, 50 insertions(+), 2 deletions(-)

diff --git a/tests/qemu-iotests/041 b/tests/qemu-iotests/041
index c6eb851..e7c004a 100755
--- a/tests/qemu-iotests/041
+++ b/tests/qemu-iotests/041
@@ -292,6 +292,54 @@ class TestMirrorNoBacking(ImageMirroringTestCase):
         self.assertTrue(self.compare_images(test_img, target_img),
                         'target image does not match source after mirroring')
 
+class TestMirrorResized(ImageMirroringTestCase):
+    backing_len = 1 * 1024 * 1024 # MB
+    image_len = 2 * 1024 * 1024 # MB
+
+    def setUp(self):
+        self.create_image(backing_img, TestMirrorResized.backing_len)
+        qemu_img('create', '-f', iotests.imgfmt, '-o', 'backing_file=%s' % 
backing_img, test_img)
+        qemu_img('resize', test_img, '2M')
+        self.vm = iotests.VM().add_drive(test_img)
+        self.vm.launch()
+
+    def tearDown(self):
+        self.vm.shutdown()
+        os.remove(test_img)
+        os.remove(backing_img)
+        try:
+            os.remove(target_img)
+        except OSError:
+            pass
+
+    def test_complete_top(self):
+        self.assert_no_active_mirrors()
+
+        result = self.vm.qmp('drive-mirror', device='drive0', sync='top',
+                             target=target_img)
+        self.assert_qmp(result, 'return', {})
+
+        self.complete_and_wait()
+        result = self.vm.qmp('query-block')
+        self.assert_qmp(result, 'return[0]/inserted/file', target_img)
+        self.vm.shutdown()
+        self.assertTrue(self.compare_images(test_img, target_img),
+                        'target image does not match source after mirroring')
+
+    def test_complete_full(self):
+        self.assert_no_active_mirrors()
+
+        result = self.vm.qmp('drive-mirror', device='drive0', sync='full',
+                             target=target_img)
+        self.assert_qmp(result, 'return', {})
+
+        self.complete_and_wait()
+        result = self.vm.qmp('query-block')
+        self.assert_qmp(result, 'return[0]/inserted/file', target_img)
+        self.vm.shutdown()
+        self.assertTrue(self.compare_images(test_img, target_img),
+                        'target image does not match source after mirroring')
+
 class TestReadErrors(ImageMirroringTestCase):
     image_len = 2 * 1024 * 1024 # MB
 
diff --git a/tests/qemu-iotests/041.out b/tests/qemu-iotests/041.out
index 71009c2..3a89159 100644
--- a/tests/qemu-iotests/041.out
+++ b/tests/qemu-iotests/041.out
@@ -1,5 +1,5 @@
-..................
+....................
 ----------------------------------------------------------------------
-Ran 18 tests
+Ran 20 tests
 
 OK
-- 
1.7.9.5