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Date: Wed, 18 May 2022 15:43:35 +0800
From: David Gow <davidgow@...gle.com>
To: Daniel Latypov <dlatypov@...gle.com>
Cc: Brendan Higgins <brendanhiggins@...gle.com>,
Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
KUnit Development <kunit-dev@...glegroups.com>,
"open list:KERNEL SELFTEST FRAMEWORK"
<linux-kselftest@...r.kernel.org>,
Shuah Khan <skhan@...uxfoundation.org>
Subject: Re: [PATCH 2/3] kunit: tool: redo how we construct and mock LinuxSourceTree
On Tue, May 17, 2022 at 3:48 AM 'Daniel Latypov' via KUnit Development
<kunit-dev@...glegroups.com> wrote:
>
> Our main function currently has an optional `linux` argument which is
> used to by our unit tests to inject a mock.
> We currently have the same code copy-pasted several times to do
> if not linux:
> linux = MakeRealInstance(cli_args.foo, cli_args.bar, ...)
>
> But in python, dependency injection isn't necessary or idiomatic when we
> can just use mock.patch() to mock things out.
>
> This change
> 1. adds a helper to create a LinuxSourceTree from the cli_args
> 2. drops the `linux` parameter in favor of mocking the __init__ func.
>
> Signed-off-by: Daniel Latypov <dlatypov@...gle.com>
> ---
This is much cleaner, thanks.
Reviewed-by: David Gow <davidgow@...gle.com>
Cheers,
-- David
> tools/testing/kunit/kunit.py | 49 ++++--------
> tools/testing/kunit/kunit_tool_test.py | 103 ++++++++++++-------------
> 2 files changed, 65 insertions(+), 87 deletions(-)
>
> diff --git a/tools/testing/kunit/kunit.py b/tools/testing/kunit/kunit.py
> index 13bd72e47da8..8a90d80ee66e 100755
> --- a/tools/testing/kunit/kunit.py
> +++ b/tools/testing/kunit/kunit.py
> @@ -365,7 +365,18 @@ def add_parse_opts(parser) -> None:
> 'filename is specified',
> type=str, const='stdout', default=None, metavar='FILE')
>
> -def main(argv, linux=None):
> +
> +def tree_from_args(cli_args: argparse.Namespace) -> kunit_kernel.LinuxSourceTree:
> + """Returns a LinuxSourceTree based on the user's arguments."""
> + return kunit_kernel.LinuxSourceTree(cli_args.build_dir,
> + kunitconfig_path=cli_args.kunitconfig,
> + kconfig_add=cli_args.kconfig_add,
> + arch=cli_args.arch,
> + cross_compile=cli_args.cross_compile,
> + qemu_config_path=cli_args.qemu_config)
> +
> +
> +def main(argv):
> parser = argparse.ArgumentParser(
> description='Helps writing and running KUnit tests.')
> subparser = parser.add_subparsers(dest='subcommand')
> @@ -412,14 +423,7 @@ def main(argv, linux=None):
> if not os.path.exists(cli_args.build_dir):
> os.mkdir(cli_args.build_dir)
>
> - if not linux:
> - linux = kunit_kernel.LinuxSourceTree(cli_args.build_dir,
> - kunitconfig_path=cli_args.kunitconfig,
> - kconfig_add=cli_args.kconfig_add,
> - arch=cli_args.arch,
> - cross_compile=cli_args.cross_compile,
> - qemu_config_path=cli_args.qemu_config)
> -
> + linux = tree_from_args(cli_args)
> request = KunitRequest(build_dir=cli_args.build_dir,
> make_options=cli_args.make_options,
> jobs=cli_args.jobs,
> @@ -438,14 +442,7 @@ def main(argv, linux=None):
> not os.path.exists(cli_args.build_dir)):
> os.mkdir(cli_args.build_dir)
>
> - if not linux:
> - linux = kunit_kernel.LinuxSourceTree(cli_args.build_dir,
> - kunitconfig_path=cli_args.kunitconfig,
> - kconfig_add=cli_args.kconfig_add,
> - arch=cli_args.arch,
> - cross_compile=cli_args.cross_compile,
> - qemu_config_path=cli_args.qemu_config)
> -
> + linux = tree_from_args(cli_args)
> request = KunitConfigRequest(build_dir=cli_args.build_dir,
> make_options=cli_args.make_options)
> result = config_tests(linux, request)
> @@ -455,14 +452,7 @@ def main(argv, linux=None):
> if result.status != KunitStatus.SUCCESS:
> sys.exit(1)
> elif cli_args.subcommand == 'build':
> - if not linux:
> - linux = kunit_kernel.LinuxSourceTree(cli_args.build_dir,
> - kunitconfig_path=cli_args.kunitconfig,
> - kconfig_add=cli_args.kconfig_add,
> - arch=cli_args.arch,
> - cross_compile=cli_args.cross_compile,
> - qemu_config_path=cli_args.qemu_config)
> -
> + linux = tree_from_args(cli_args)
> request = KunitBuildRequest(build_dir=cli_args.build_dir,
> make_options=cli_args.make_options,
> jobs=cli_args.jobs,
> @@ -474,14 +464,7 @@ def main(argv, linux=None):
> if result.status != KunitStatus.SUCCESS:
> sys.exit(1)
> elif cli_args.subcommand == 'exec':
> - if not linux:
> - linux = kunit_kernel.LinuxSourceTree(cli_args.build_dir,
> - kunitconfig_path=cli_args.kunitconfig,
> - kconfig_add=cli_args.kconfig_add,
> - arch=cli_args.arch,
> - cross_compile=cli_args.cross_compile,
> - qemu_config_path=cli_args.qemu_config)
> -
> + linux = tree_from_args(cli_args)
> exec_request = KunitExecRequest(raw_output=cli_args.raw_output,
> build_dir=cli_args.build_dir,
> json=cli_args.json,
> diff --git a/tools/testing/kunit/kunit_tool_test.py b/tools/testing/kunit/kunit_tool_test.py
> index b9158017ece6..baee11d96474 100755
> --- a/tools/testing/kunit/kunit_tool_test.py
> +++ b/tools/testing/kunit/kunit_tool_test.py
> @@ -503,24 +503,25 @@ class KUnitMainTest(unittest.TestCase):
> self.print_mock = mock.patch('builtins.print').start()
> self.addCleanup(mock.patch.stopall)
>
> - self.linux_source_mock = mock.Mock()
> - self.linux_source_mock.build_reconfig = mock.Mock(return_value=True)
> - self.linux_source_mock.build_kernel = mock.Mock(return_value=True)
> - self.linux_source_mock.run_kernel = mock.Mock(return_value=all_passed_log)
> + self.mock_linux_init = mock.patch.object(kunit_kernel, 'LinuxSourceTree').start()
> + self.linux_source_mock = self.mock_linux_init.return_value
> + self.linux_source_mock.build_reconfig.return_value = True
> + self.linux_source_mock.build_kernel.return_value = True
> + self.linux_source_mock.run_kernel.return_value = all_passed_log
>
> def test_config_passes_args_pass(self):
> - kunit.main(['config', '--build_dir=.kunit'], self.linux_source_mock)
> + kunit.main(['config', '--build_dir=.kunit'])
> self.assertEqual(self.linux_source_mock.build_reconfig.call_count, 1)
> self.assertEqual(self.linux_source_mock.run_kernel.call_count, 0)
>
> def test_build_passes_args_pass(self):
> - kunit.main(['build'], self.linux_source_mock)
> + kunit.main(['build'])
> self.assertEqual(self.linux_source_mock.build_reconfig.call_count, 1)
> self.linux_source_mock.build_kernel.assert_called_once_with(False, kunit.get_default_jobs(), '.kunit', None)
> self.assertEqual(self.linux_source_mock.run_kernel.call_count, 0)
>
> def test_exec_passes_args_pass(self):
> - kunit.main(['exec'], self.linux_source_mock)
> + kunit.main(['exec'])
> self.assertEqual(self.linux_source_mock.build_reconfig.call_count, 0)
> self.assertEqual(self.linux_source_mock.run_kernel.call_count, 1)
> self.linux_source_mock.run_kernel.assert_called_once_with(
> @@ -528,7 +529,7 @@ class KUnitMainTest(unittest.TestCase):
> self.print_mock.assert_any_call(StrContains('Testing complete.'))
>
> def test_run_passes_args_pass(self):
> - kunit.main(['run'], self.linux_source_mock)
> + kunit.main(['run'])
> self.assertEqual(self.linux_source_mock.build_reconfig.call_count, 1)
> self.assertEqual(self.linux_source_mock.run_kernel.call_count, 1)
> self.linux_source_mock.run_kernel.assert_called_once_with(
> @@ -538,13 +539,13 @@ class KUnitMainTest(unittest.TestCase):
> def test_exec_passes_args_fail(self):
> self.linux_source_mock.run_kernel = mock.Mock(return_value=[])
> with self.assertRaises(SystemExit) as e:
> - kunit.main(['exec'], self.linux_source_mock)
> + kunit.main(['exec'])
> self.assertEqual(e.exception.code, 1)
>
> def test_run_passes_args_fail(self):
> self.linux_source_mock.run_kernel = mock.Mock(return_value=[])
> with self.assertRaises(SystemExit) as e:
> - kunit.main(['run'], self.linux_source_mock)
> + kunit.main(['run'])
> self.assertEqual(e.exception.code, 1)
> self.assertEqual(self.linux_source_mock.build_reconfig.call_count, 1)
> self.assertEqual(self.linux_source_mock.run_kernel.call_count, 1)
> @@ -553,7 +554,7 @@ class KUnitMainTest(unittest.TestCase):
> def test_exec_no_tests(self):
> self.linux_source_mock.run_kernel = mock.Mock(return_value=['TAP version 14', '1..0'])
> with self.assertRaises(SystemExit) as e:
> - kunit.main(['run'], self.linux_source_mock)
> + kunit.main(['run'])
> self.assertEqual(e.exception.code, 1)
> self.linux_source_mock.run_kernel.assert_called_once_with(
> args=None, build_dir='.kunit', filter_glob='', timeout=300)
> @@ -561,7 +562,7 @@ class KUnitMainTest(unittest.TestCase):
>
> def test_exec_raw_output(self):
> self.linux_source_mock.run_kernel = mock.Mock(return_value=[])
> - kunit.main(['exec', '--raw_output'], self.linux_source_mock)
> + kunit.main(['exec', '--raw_output'])
> self.assertEqual(self.linux_source_mock.run_kernel.call_count, 1)
> for call in self.print_mock.call_args_list:
> self.assertNotEqual(call, mock.call(StrContains('Testing complete.')))
> @@ -569,7 +570,7 @@ class KUnitMainTest(unittest.TestCase):
>
> def test_run_raw_output(self):
> self.linux_source_mock.run_kernel = mock.Mock(return_value=[])
> - kunit.main(['run', '--raw_output'], self.linux_source_mock)
> + kunit.main(['run', '--raw_output'])
> self.assertEqual(self.linux_source_mock.build_reconfig.call_count, 1)
> self.assertEqual(self.linux_source_mock.run_kernel.call_count, 1)
> for call in self.print_mock.call_args_list:
> @@ -578,7 +579,7 @@ class KUnitMainTest(unittest.TestCase):
>
> def test_run_raw_output_kunit(self):
> self.linux_source_mock.run_kernel = mock.Mock(return_value=[])
> - kunit.main(['run', '--raw_output=kunit'], self.linux_source_mock)
> + kunit.main(['run', '--raw_output=kunit'])
> self.assertEqual(self.linux_source_mock.build_reconfig.call_count, 1)
> self.assertEqual(self.linux_source_mock.run_kernel.call_count, 1)
> for call in self.print_mock.call_args_list:
> @@ -588,27 +589,27 @@ class KUnitMainTest(unittest.TestCase):
> def test_run_raw_output_invalid(self):
> self.linux_source_mock.run_kernel = mock.Mock(return_value=[])
> with self.assertRaises(SystemExit) as e:
> - kunit.main(['run', '--raw_output=invalid'], self.linux_source_mock)
> + kunit.main(['run', '--raw_output=invalid'])
> self.assertNotEqual(e.exception.code, 0)
>
> def test_run_raw_output_does_not_take_positional_args(self):
> # --raw_output is a string flag, but we don't want it to consume
> # any positional arguments, only ones after an '='
> self.linux_source_mock.run_kernel = mock.Mock(return_value=[])
> - kunit.main(['run', '--raw_output', 'filter_glob'], self.linux_source_mock)
> + kunit.main(['run', '--raw_output', 'filter_glob'])
> self.linux_source_mock.run_kernel.assert_called_once_with(
> args=None, build_dir='.kunit', filter_glob='filter_glob', timeout=300)
>
> def test_exec_timeout(self):
> timeout = 3453
> - kunit.main(['exec', '--timeout', str(timeout)], self.linux_source_mock)
> + kunit.main(['exec', '--timeout', str(timeout)])
> self.linux_source_mock.run_kernel.assert_called_once_with(
> args=None, build_dir='.kunit', filter_glob='', timeout=timeout)
> self.print_mock.assert_any_call(StrContains('Testing complete.'))
>
> def test_run_timeout(self):
> timeout = 3453
> - kunit.main(['run', '--timeout', str(timeout)], self.linux_source_mock)
> + kunit.main(['run', '--timeout', str(timeout)])
> self.assertEqual(self.linux_source_mock.build_reconfig.call_count, 1)
> self.linux_source_mock.run_kernel.assert_called_once_with(
> args=None, build_dir='.kunit', filter_glob='', timeout=timeout)
> @@ -616,7 +617,7 @@ class KUnitMainTest(unittest.TestCase):
>
> def test_run_builddir(self):
> build_dir = '.kunit'
> - kunit.main(['run', '--build_dir=.kunit'], self.linux_source_mock)
> + kunit.main(['run', '--build_dir=.kunit'])
> self.assertEqual(self.linux_source_mock.build_reconfig.call_count, 1)
> self.linux_source_mock.run_kernel.assert_called_once_with(
> args=None, build_dir=build_dir, filter_glob='', timeout=300)
> @@ -624,60 +625,54 @@ class KUnitMainTest(unittest.TestCase):
>
> def test_config_builddir(self):
> build_dir = '.kunit'
> - kunit.main(['config', '--build_dir', build_dir], self.linux_source_mock)
> + kunit.main(['config', '--build_dir', build_dir])
> self.assertEqual(self.linux_source_mock.build_reconfig.call_count, 1)
>
> def test_build_builddir(self):
> build_dir = '.kunit'
> jobs = kunit.get_default_jobs()
> - kunit.main(['build', '--build_dir', build_dir], self.linux_source_mock)
> + kunit.main(['build', '--build_dir', build_dir])
> self.linux_source_mock.build_kernel.assert_called_once_with(False, jobs, build_dir, None)
>
> def test_exec_builddir(self):
> build_dir = '.kunit'
> - kunit.main(['exec', '--build_dir', build_dir], self.linux_source_mock)
> + kunit.main(['exec', '--build_dir', build_dir])
> self.linux_source_mock.run_kernel.assert_called_once_with(
> args=None, build_dir=build_dir, filter_glob='', timeout=300)
> self.print_mock.assert_any_call(StrContains('Testing complete.'))
>
> - @mock.patch.object(kunit_kernel, 'LinuxSourceTree')
> - def test_run_kunitconfig(self, mock_linux_init):
> - mock_linux_init.return_value = self.linux_source_mock
> + def test_run_kunitconfig(self):
> kunit.main(['run', '--kunitconfig=mykunitconfig'])
> # Just verify that we parsed and initialized it correctly here.
> - mock_linux_init.assert_called_once_with('.kunit',
> - kunitconfig_path='mykunitconfig',
> - kconfig_add=None,
> - arch='um',
> - cross_compile=None,
> - qemu_config_path=None)
> -
> - @mock.patch.object(kunit_kernel, 'LinuxSourceTree')
> - def test_config_kunitconfig(self, mock_linux_init):
> - mock_linux_init.return_value = self.linux_source_mock
> + self.mock_linux_init.assert_called_once_with('.kunit',
> + kunitconfig_path='mykunitconfig',
> + kconfig_add=None,
> + arch='um',
> + cross_compile=None,
> + qemu_config_path=None)
> +
> + def test_config_kunitconfig(self):
> kunit.main(['config', '--kunitconfig=mykunitconfig'])
> # Just verify that we parsed and initialized it correctly here.
> - mock_linux_init.assert_called_once_with('.kunit',
> - kunitconfig_path='mykunitconfig',
> - kconfig_add=None,
> - arch='um',
> - cross_compile=None,
> - qemu_config_path=None)
> -
> - @mock.patch.object(kunit_kernel, 'LinuxSourceTree')
> - def test_run_kconfig_add(self, mock_linux_init):
> - mock_linux_init.return_value = self.linux_source_mock
> + self.mock_linux_init.assert_called_once_with('.kunit',
> + kunitconfig_path='mykunitconfig',
> + kconfig_add=None,
> + arch='um',
> + cross_compile=None,
> + qemu_config_path=None)
> +
> + def test_run_kconfig_add(self):
> kunit.main(['run', '--kconfig_add=CONFIG_KASAN=y', '--kconfig_add=CONFIG_KCSAN=y'])
> # Just verify that we parsed and initialized it correctly here.
> - mock_linux_init.assert_called_once_with('.kunit',
> - kunitconfig_path=None,
> - kconfig_add=['CONFIG_KASAN=y', 'CONFIG_KCSAN=y'],
> - arch='um',
> - cross_compile=None,
> - qemu_config_path=None)
> + self.mock_linux_init.assert_called_once_with('.kunit',
> + kunitconfig_path=None,
> + kconfig_add=['CONFIG_KASAN=y', 'CONFIG_KCSAN=y'],
> + arch='um',
> + cross_compile=None,
> + qemu_config_path=None)
>
> def test_run_kernel_args(self):
> - kunit.main(['run', '--kernel_args=a=1', '--kernel_args=b=2'], self.linux_source_mock)
> + kunit.main(['run', '--kernel_args=a=1', '--kernel_args=b=2'])
> self.assertEqual(self.linux_source_mock.build_reconfig.call_count, 1)
> self.linux_source_mock.run_kernel.assert_called_once_with(
> args=['a=1','b=2'], build_dir='.kunit', filter_glob='', timeout=300)
> @@ -699,7 +694,7 @@ class KUnitMainTest(unittest.TestCase):
> @mock.patch.object(kunit, '_list_tests')
> def test_run_isolated_by_suite(self, mock_tests):
> mock_tests.return_value = ['suite.test1', 'suite.test2', 'suite2.test1']
> - kunit.main(['exec', '--run_isolated=suite', 'suite*.test*'], self.linux_source_mock)
> + kunit.main(['exec', '--run_isolated=suite', 'suite*.test*'])
>
> # Should respect the user's filter glob when listing tests.
> mock_tests.assert_called_once_with(mock.ANY,
> @@ -712,7 +707,7 @@ class KUnitMainTest(unittest.TestCase):
> @mock.patch.object(kunit, '_list_tests')
> def test_run_isolated_by_test(self, mock_tests):
> mock_tests.return_value = ['suite.test1', 'suite.test2', 'suite2.test1']
> - kunit.main(['exec', '--run_isolated=test', 'suite*'], self.linux_source_mock)
> + kunit.main(['exec', '--run_isolated=test', 'suite*'])
>
> # Should respect the user's filter glob when listing tests.
> mock_tests.assert_called_once_with(mock.ANY,
> --
> 2.36.1.124.g0e6072fb45-goog
>
> --
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