Re: [Qemu-devel] [PATCH V2 12/12] qemu-iotests: add 055 internal snapshot for block device test case

[Stefan Hajnoczi <stefanha@gmail.com>]

On Fri, Jun 14, 2013 at 07:39:59PM +0800, Wenchao Xia wrote:
> Signed-off-by: Wenchao Xia <xiawenc@linux.vnet.ibm.com>
> ---
>  tests/qemu-iotests/055     |  157 ++++++++++++++++++++++++++++++++++++++++++++
>  tests/qemu-iotests/055.out |    5 ++

drive-backup already uses 055, please name it 056 to avoid conflicts.

>  tests/qemu-iotests/group   |    1 +
>  3 files changed, 163 insertions(+), 0 deletions(-)
>  create mode 100755 tests/qemu-iotests/055
>  create mode 100644 tests/qemu-iotests/055.out
> 
> diff --git a/tests/qemu-iotests/055 b/tests/qemu-iotests/055
> new file mode 100755
> index 0000000..7658f22
> --- /dev/null
> +++ b/tests/qemu-iotests/055
> @@ -0,0 +1,157 @@
> +#!/usr/bin/env python
> +#
> +# Tests for internal snapshot.
> +#

Copyright (C) 2013 IBM ...

Based on 055:

> +# Copyright (C) 2012 Red Hat, Inc.
> +#
> +# This program is free software; you can redistribute it and/or modify
> +# it under the terms of the GNU General Public License as published by
> +# the Free Software Foundation; either version 2 of the License, or
> +# (at your option) any later version.
> +#
> +# This program is distributed in the hope that it will be useful,
> +# but WITHOUT ANY WARRANTY; without even the implied warranty of
> +# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
> +# GNU General Public License for more details.
> +#
> +# You should have received a copy of the GNU General Public License
> +# along with this program.  If not, see <http://www.gnu.org/licenses/>.
> +#
> +
> +import time
> +import os
> +import iotests
> +from iotests import qemu_img, qemu_io
> +
> +test_drv_base_name = 'drive'
> +
> +class ImageSnapshotTestCase(iotests.QMPTestCase):
> +    image_len = 120 * 1024 * 1024 # MB
> +
> +    def __init__(self, *args):
> +        self.expect = []
> +        super(ImageSnapshotTestCase, self).__init__(*args)
> +
> +    def _setUp(self, test_img_base_name, image_num):
> +        self.vm = iotests.VM()
> +        for i in range(0, image_num):
> +            filename = '%s%d' % (test_img_base_name, i)
> +            img = os.path.join(iotests.test_dir, filename)
> +            device = '%s%d' % (test_drv_base_name, i)
> +            qemu_img('create', '-f', iotests.imgfmt, img, str(self.image_len))
> +            self.vm.add_drive(img)
> +            self.expect.append({'image': img, 'device': device,
> +                                'snapshots': [], 'snapshots_name_counter': 0})
> +        self.vm.launch()
> +
> +    def tearDown(self):
> +        self.vm.shutdown()
> +        for i in range(0, len(self.expect)):
> +            os.remove(self.expect[i]['image'])
> +
> +    def createSnapshotInTransaction(self, snapshot_num):
> +        actions = []
> +        for i in range(0, len(self.expect)):
> +            num = self.expect[i]['snapshots_name_counter']
> +            for j in range(0, snapshot_num):
> +                name = '%s_sn%d' % (self.expect[i]['device'], num)
> +                num = num + 1
> +                self.expect[i]['snapshots'].append(name)
> +                actions.append({
> +                    'type': 'blockdev-snapshot-internal-sync',
> +                    'data': { 'device': self.expect[i]['device'],
> +                              'name': name },
> +                })
> +            self.expect[i]['snapshots_name_counter'] = num
> +        result = self.vm.qmp('transaction', actions = actions)
> +        self.assert_qmp(result, 'return', {})

This tests the success case.  Please also use the 'Abort' action to test
the error case.

> +    def verifySnapshotInfo(self):
> +        expect = self.expect
> +        result = self.vm.qmp('query-block')
> +        for i in range(0, len(expect)):
> +            image = None
> +            for device in result['return']:
> +                if device['device'] == expect[i]['device']:
> +                    image = device['inserted']['image']
> +                    break
> +            self.assertTrue(image != None)
> +            self.assertTrue(len(image['snapshots']) ==
> +                            len(expect[i]['snapshots']))
> +            for j in range(0, len(image['snapshots'])):
> +                try:
> +                    expect[i]['snapshots'].index(image['snapshots'][j]['name'])
> +                except:
> +                    print 'not full match, image info:\n%s\n, expect:%s\n' % \
> +                          (str(image), str(expect))
> +                    self.assertTrue(False)
> +
> +    def deleteSnapshot(self, device, name):
> +        result = self.vm.qmp('blockdev-snapshot-delete-internal-sync',
> +                              device = device,
> +                              name = name)
> +        self.assert_qmp(result, 'return', {})
> +        expect = self.expect
> +        sn_list_expect = None
> +        for i in range(0, len(expect)):
> +            if expect[i]['device'] == device :
> +                sn_list_expect = expect[i]['snapshots']
> +                break
> +        self.assertTrue(sn_list_expect != None)
> +        try:
> +            sn_list_expect.remove(name)
> +        except:
> +            print 'snapshot %s not found in expect:\n%s\n' % \
> +                  (name, str(expect))
> +            self.assertTrue(False)
> +
> +class TestSingleTransaction(ImageSnapshotTestCase):
> +    def setUp(self):
> +        self._setUp('test_a.img', 1)
> +
> +    def test_create(self):
> +        self.createSnapshotInTransaction(1)
> +        self.verifySnapshotInfo()
> +
> +    def test_error_name(self):
> +        actions = [{'type': 'blockdev-snapshot-internal-sync',
> +                    'data': { 'device': self.expect[0]['device'],
> +                              'name': '1234' },
> +                  }]
> +        result = self.vm.qmp('transaction', actions = actions)
> +        self.assert_qmp(result, 'error/class', 'GenericError')

Please check that empty names error too.