Re: [Qemu-devel] [PATCH v5 11/11] qemu-iotests: add 055 drive-backup test case

[Kevin Wolf]

Am 30.05.2013 um 14:34 hat Stefan Hajnoczi geschrieben:
> Testing drive-backup is similar to image streaming and drive mirroring.
> This test case is based on 041.
> 
> Signed-off-by: Stefan Hajnoczi <address@hidden>
> ---
>  tests/qemu-iotests/055     | 256 
> +++++++++++++++++++++++++++++++++++++++++++++
>  tests/qemu-iotests/055.out |   5 +
>  tests/qemu-iotests/group   |   1 +
>  3 files changed, 262 insertions(+)
>  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..0341301
> --- /dev/null
> +++ b/tests/qemu-iotests/055
> @@ -0,0 +1,256 @@
> +#!/usr/bin/env python
> +#
> +# Tests for drive-backup
> +#
> +# Copyright (C) 2013 Red Hat, Inc.
> +#
> +# Based on 041.
> +#
> +# 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_img = os.path.join(iotests.test_dir, 'test.img')
> +target_img = os.path.join(iotests.test_dir, 'target.img')
> +
> +class TestSingleDrive(iotests.QMPTestCase):
> +    image_len = 120 * 1024 * 1024 # MB
> +
> +    def setUp(self):
> +        qemu_img('create', '-f', iotests.imgfmt, test_img, 
> str(TestSingleDrive.image_len))
> +        self.vm = iotests.VM().add_drive(test_img)
> +        self.vm.launch()
> +
> +    def tearDown(self):
> +        self.vm.shutdown()
> +        os.remove(test_img)
> +        try:
> +            os.remove(target_img)
> +        except OSError:
> +            pass
> +
> +    def test_cancel(self):
> +        self.assert_no_active_block_jobs()
> +
> +        result = self.vm.qmp('drive-backup', device='drive0',
> +                             target=target_img)
> +        self.assert_qmp(result, 'return', {})
> +
> +        self.cancel_and_wait()

Check the return value?

More instances follow.

> +
> +    def test_pause(self):
> +        self.assert_no_active_block_jobs()
> +
> +        result = self.vm.qmp('drive-backup', device='drive0',
> +                             target=target_img)
> +        self.assert_qmp(result, 'return', {})
> +
> +        result = self.vm.qmp('block-job-pause', device='drive0')
> +        self.assert_qmp(result, 'return', {})
> +
> +        time.sleep(1)
> +        result = self.vm.qmp('query-block-jobs')
> +        offset = self.dictpath(result, 'return[0]/offset')
> +
> +        time.sleep(1)
> +        result = self.vm.qmp('query-block-jobs')
> +        self.assert_qmp(result, 'return[0]/offset', offset)
> +
> +        self.vm.shutdown()
> +        self.assertTrue(iotests.compare_images(test_img, target_img),
> +                        'target image does not match source after backup')

As discussed on IRC, test_img should be initialised with non-zero data
so that this check is actually meaningful.

Then it's also necessary to resume the job and wait for completion
before the check will succeed.

The same applies to the corresponding transaction test case.

Kevin