Date:   Tue, 18 Jul 2023 16:42:44 -0400
From:   Rae Moar <rmoar@...gle.com>
To:     David Gow <davidgow@...gle.com>
Cc:     shuah@...nel.org, dlatypov@...gle.com, brendan.higgins@...ux.dev,
        linux-kselftest@...r.kernel.org, kunit-dev@...glegroups.com,
        linux-kernel@...r.kernel.org, keescook@...omium.org,
        linux-hardening@...r.kernel.org, jstultz@...gle.com,
        tglx@...utronix.de, sboyd@...nel.org
Subject: Re: [RFC v2 5/9] kunit: tool: Add command line interface to filter
 and report attributes

On Tue, Jul 18, 2023 at 3:39 AM David Gow <davidgow@...gle.com> wrote:
>
> On Sat, 8 Jul 2023 at 05:10, Rae Moar <rmoar@...gle.com> wrote:
> >
> > Add ability to kunit.py to filter attributes and report a list of tests
> > including attributes without running tests.
> >
> > Add flag "--filter" to input filters on test attributes. Tests will be
> > filtered out if they do not match all inputted filters.
> >
> > Example: --filter speed=slow (This filter would run only the tests that are
> > marked as slow)
> >
> > Filters have operations: <, >, <=, >=, !=, and =. But note that the
> > characters < and > are often interpreted by the shell, so they may need to
> > be quoted or escaped.
> >
> > Example: --filter "speed>slow" or --filter speed\>slow (This filter would
> > run only the tests that have the speed faster than slow.
> >
> > Additionally, multiple filters can be used.
> >
> > Example: --filter "speed=slow, module!=example" (This filter would run
> > only the tests that have the speed slow and are not in the "example"
> > module)
> >
> > Note if the user wants to skip filtered tests instead of not
> > running/showing them use the "--filter_skip" flag instead.
> >
> > Expose the output of kunit.action=list option with flag "--list_tests" to
> > output a list of tests. Additionally, add flag "--list_tests_attr" to
> > output a list of tests and their attributes. These flags are useful to see
> > tests and test attributes without needing to run tests.
> >
> > Example of the output of "--list_tests_attr":
> >   example
> >   example.test_1
> >   example.test_2
> >   # example.test_2.speed: slow
> >
> > This output includes a suite, example, with two test cases, test_1 and
> > test_2. And in this instance test_2 has been marked as slow.
> >
> > Signed-off-by: Rae Moar <rmoar@...gle.com>
> > ---
> >
> > Changes since v1:
> > - Change method for inputting filters to allow for spaces in filtering
> >   values
> > - Add option to skip filtered tests instead of not run or show them with
> >   the --filter_skip flag
> > - Separate the new feature to list tests and their attributes into both
> >   --list_tests (lists just tests) and --list_tests_attr (lists all)
> >
> >  tools/testing/kunit/kunit.py           | 80 ++++++++++++++++++++++++--
> >  tools/testing/kunit/kunit_kernel.py    |  6 +-
> >  tools/testing/kunit/kunit_tool_test.py | 39 ++++++-------
> >  3 files changed, 96 insertions(+), 29 deletions(-)
> >
> > diff --git a/tools/testing/kunit/kunit.py b/tools/testing/kunit/kunit.py
> > index 3905c43369c3..6104e622ce20 100755
> > --- a/tools/testing/kunit/kunit.py
> > +++ b/tools/testing/kunit/kunit.py
> > @@ -55,8 +55,12 @@ class KunitExecRequest(KunitParseRequest):
> >         build_dir: str
> >         timeout: int
> >         filter_glob: str
> > +       filter: str
> > +       filter_skip: str
> >         kernel_args: Optional[List[str]]
> >         run_isolated: Optional[str]
> > +       list_tests: bool
> > +       list_tests_attr: bool
> >
> >  @dataclass
> >  class KunitRequest(KunitExecRequest, KunitBuildRequest):
> > @@ -102,19 +106,39 @@ def config_and_build_tests(linux: kunit_kernel.LinuxSourceTree,
> >
> >  def _list_tests(linux: kunit_kernel.LinuxSourceTree, request: KunitExecRequest) -> List[str]:
> >         args = ['kunit.action=list']
> > +
> > +       if request.kernel_args:
> > +               args.extend(request.kernel_args)
> > +
> > +       output = linux.run_kernel(args=args,
> > +                          timeout=request.timeout,
> > +                          filter_glob=request.filter_glob,
> > +                          filter=request.filter,
> > +                          build_dir=request.build_dir)
> > +       lines = kunit_parser.extract_tap_lines(output)
> > +       # Hack! Drop the dummy TAP version header that the executor prints out.
> > +       lines.pop()
> > +
> > +       # Filter out any extraneous non-test output that might have gotten mixed in.
> > +       return [l for l in output if re.match(r'^[^\s.]+\.[^\s.]+$', l)]
> > +
> > +def _list_tests_attr(linux: kunit_kernel.LinuxSourceTree, request: KunitExecRequest) -> Iterable[str]:
> > +       args = ['kunit.action=list_attr']
> > +
> >         if request.kernel_args:
> >                 args.extend(request.kernel_args)
> >
> >         output = linux.run_kernel(args=args,
> >                            timeout=request.timeout,
> >                            filter_glob=request.filter_glob,
> > +                          filter=request.filter,
> >                            build_dir=request.build_dir)
> >         lines = kunit_parser.extract_tap_lines(output)
> >         # Hack! Drop the dummy TAP version header that the executor prints out.
> >         lines.pop()
> >
> >         # Filter out any extraneous non-test output that might have gotten mixed in.
> > -       return [l for l in lines if re.match(r'^[^\s.]+\.[^\s.]+$', l)]
> > +       return lines
> >
> >  def _suites_from_test_list(tests: List[str]) -> List[str]:
> >         """Extracts all the suites from an ordered list of tests."""
> > @@ -128,10 +152,18 @@ def _suites_from_test_list(tests: List[str]) -> List[str]:
> >                         suites.append(suite)
> >         return suites
> >
> > -
> > -
> >  def exec_tests(linux: kunit_kernel.LinuxSourceTree, request: KunitExecRequest) -> KunitResult:
> >         filter_globs = [request.filter_glob]
> > +       if request.list_tests:
> > +               output = _list_tests(linux, request)
> > +               for line in output:
> > +                       print(line.rstrip())
> > +               return KunitResult(status=KunitStatus.SUCCESS, elapsed_time=0.0)
> > +       if request.list_tests_attr:
> > +               attr_output = _list_tests_attr(linux, request)
> > +               for line in attr_output:
> > +                       print(line.rstrip())
> > +               return KunitResult(status=KunitStatus.SUCCESS, elapsed_time=0.0)
> >         if request.run_isolated:
> >                 tests = _list_tests(linux, request)
> >                 if request.run_isolated == 'test':
> > @@ -145,6 +177,17 @@ def exec_tests(linux: kunit_kernel.LinuxSourceTree, request: KunitExecRequest) -
> >
> >         metadata = kunit_json.Metadata(arch=linux.arch(), build_dir=request.build_dir, def_config='kunit_defconfig')
> >
> > +       filter = request.filter
> > +       if request.filter_skip:
> > +               args = ['kunit.filter_action=skip']
> > +               filter = request.filter_skip
> > +               if request.kernel_args:
> > +                       args.extend(request.kernel_args)
>
> What happens if both filter and filter_skip are set? We should
> probably either make those mutually exclusive (error if both are set),
> or expose filter_action directly instead.

That's a great idea. I wouldn't mind just using filter_action instead
of filter_skip. I will change this for the next version.

>
> > +       elif request.kernel_args:
> > +               args = request.kernel_args
> > +       else:
> > +               args = None
> > +
> >         test_counts = kunit_parser.TestCounts()
> >         exec_time = 0.0
> >         for i, filter_glob in enumerate(filter_globs):
> > @@ -152,9 +195,10 @@ def exec_tests(linux: kunit_kernel.LinuxSourceTree, request: KunitExecRequest) -
> >
> >                 test_start = time.time()
> >                 run_result = linux.run_kernel(
> > -                       args=request.kernel_args,
> > +                       args=args,
> >                         timeout=request.timeout,
> >                         filter_glob=filter_glob,
> > +                       filter=filter,
> >                         build_dir=request.build_dir)
> >
> >                 _, test_result = parse_tests(request, metadata, run_result)
> > @@ -341,6 +385,18 @@ def add_exec_opts(parser: argparse.ArgumentParser) -> None:
> >                             nargs='?',
> >                             default='',
> >                             metavar='filter_glob')
> > +       parser.add_argument('--filter',
> > +                           help='Filter KUnit tests with attributes, '
> > +                               'filtered tests will not run, '
> > +                           'e.g. speed=fast or speed=>low',
>
> Neither fast or low are valid values for speed now.

Sorry about this. I have changed this for the next version.

>
> > +                           type=str,
> > +                               default='')
> > +       parser.add_argument('--filter_skip',
> > +                           help='Filter KUnit tests run with attributes, '
> > +                               'filtered tests will be skipped, '
> > +                           'e.g. speed=fast or speed=>low',
>
> Neither fast or low are valid values for speed now.
>
>

Oops. I have changed this for the next version.

>
> > +                           type=str,
> > +                               default='')
> >         parser.add_argument('--kernel_args',
> >                             help='Kernel command-line parameters. Maybe be repeated',
> >                              action='append', metavar='')
> > @@ -350,6 +406,10 @@ def add_exec_opts(parser: argparse.ArgumentParser) -> None:
> >                             'what ran before it.',
> >                             type=str,
> >                             choices=['suite', 'test'])
> > +       parser.add_argument('--list_tests', help='If set, list all tests',
> > +                           action='store_true')
> > +       parser.add_argument('--list_tests_attr', help='If set, list all tests and attributes.',
> > +                           action='store_true')
> >
> >  def add_parse_opts(parser: argparse.ArgumentParser) -> None:
> >         parser.add_argument('--raw_output', help='If set don\'t parse output from kernel. '
> > @@ -398,8 +458,12 @@ def run_handler(cli_args: argparse.Namespace) -> None:
> >                                         json=cli_args.json,
> >                                         timeout=cli_args.timeout,
> >                                         filter_glob=cli_args.filter_glob,
> > +                                       filter=cli_args.filter,
> > +                                       filter_skip=cli_args.filter_skip,
> >                                         kernel_args=cli_args.kernel_args,
> > -                                       run_isolated=cli_args.run_isolated)
> > +                                       run_isolated=cli_args.run_isolated,
> > +                                       list_tests=cli_args.list_tests,
> > +                                       list_tests_attr=cli_args.list_tests_attr)
> >         result = run_tests(linux, request)
> >         if result.status != KunitStatus.SUCCESS:
> >                 sys.exit(1)
> > @@ -441,8 +505,12 @@ def exec_handler(cli_args: argparse.Namespace) -> None:
> >                                         json=cli_args.json,
> >                                         timeout=cli_args.timeout,
> >                                         filter_glob=cli_args.filter_glob,
> > +                                       filter=cli_args.filter,
> > +                                       filter_skip=cli_args.filter_skip,
> >                                         kernel_args=cli_args.kernel_args,
> > -                                       run_isolated=cli_args.run_isolated)
> > +                                       run_isolated=cli_args.run_isolated,
> > +                                       list_tests=cli_args.list_tests,
> > +                                       list_tests_attr=cli_args.list_tests_attr)
> >         result = exec_tests(linux, exec_request)
> >         stdout.print_with_timestamp((
> >                 'Elapsed time: %.3fs\n') % (result.elapsed_time))
> > diff --git a/tools/testing/kunit/kunit_kernel.py b/tools/testing/kunit/kunit_kernel.py
> > index 7f648802caf6..281f062a4767 100644
> > --- a/tools/testing/kunit/kunit_kernel.py
> > +++ b/tools/testing/kunit/kunit_kernel.py
> > @@ -330,11 +330,13 @@ class LinuxSourceTree:
> >                         return False
> >                 return self.validate_config(build_dir)
> >
> > -       def run_kernel(self, args: Optional[List[str]]=None, build_dir: str='', filter_glob: str='', timeout: Optional[int]=None) -> Iterator[str]:
> > +       def run_kernel(self, args: Optional[List[str]]=None, build_dir: str='', filter_glob: str='', filter: str='', timeout: Optional[int]=None) -> Iterator[str]:
> >                 if not args:
> >                         args = []
> >                 if filter_glob:
> > -                       args.append('kunit.filter_glob='+filter_glob)
> > +                       args.append('kunit.filter_glob=' + filter_glob)
> > +               if filter:
> > +                       args.append('kunit.filter="' + filter + '"')
> >                 args.append('kunit.enable=1')
> >
> >                 process = self._ops.start(args, build_dir)
> > diff --git a/tools/testing/kunit/kunit_tool_test.py b/tools/testing/kunit/kunit_tool_test.py
> > index be35999bb84f..85a1fb72735e 100755
> > --- a/tools/testing/kunit/kunit_tool_test.py
> > +++ b/tools/testing/kunit/kunit_tool_test.py
> > @@ -597,7 +597,7 @@ class KUnitMainTest(unittest.TestCase):
> >                 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(
> > -                       args=None, build_dir='.kunit', filter_glob='', timeout=300)
> > +                       args=None, build_dir='.kunit', filter_glob='', filter='', timeout=300)
> >                 self.print_mock.assert_any_call(StrContains('Testing complete.'))
> >
> >         def test_run_passes_args_pass(self):
> > @@ -605,7 +605,7 @@ class KUnitMainTest(unittest.TestCase):
> >                 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(
> > -                       args=None, build_dir='.kunit', filter_glob='', timeout=300)
> > +                       args=None, build_dir='.kunit', filter_glob='', filter='', timeout=300)
> >                 self.print_mock.assert_any_call(StrContains('Testing complete.'))
> >
> >         def test_exec_passes_args_fail(self):
> > @@ -629,7 +629,7 @@ class KUnitMainTest(unittest.TestCase):
> >                         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)
> > +                       args=None, build_dir='.kunit', filter_glob='', filter='', timeout=300)
> >                 self.print_mock.assert_any_call(StrContains(' 0 tests run!'))
> >
> >         def test_exec_raw_output(self):
> > @@ -670,13 +670,13 @@ class KUnitMainTest(unittest.TestCase):
> >                 self.linux_source_mock.run_kernel = mock.Mock(return_value=[])
> >                 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)
> > +                       args=None, build_dir='.kunit', filter_glob='filter_glob', filter='', timeout=300)
> >
> >         def test_exec_timeout(self):
> >                 timeout = 3453
> >                 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)
> > +                       args=None, build_dir='.kunit', filter_glob='', filter='', timeout=timeout)
> >                 self.print_mock.assert_any_call(StrContains('Testing complete.'))
> >
> >         def test_run_timeout(self):
> > @@ -684,7 +684,7 @@ class KUnitMainTest(unittest.TestCase):
> >                 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)
> > +                       args=None, build_dir='.kunit', filter_glob='', filter='', timeout=timeout)
> >                 self.print_mock.assert_any_call(StrContains('Testing complete.'))
> >
> >         def test_run_builddir(self):
> > @@ -692,7 +692,7 @@ class KUnitMainTest(unittest.TestCase):
> >                 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)
> > +                       args=None, build_dir=build_dir, filter_glob='', filter='', timeout=300)
> >                 self.print_mock.assert_any_call(StrContains('Testing complete.'))
> >
> >         def test_config_builddir(self):
> > @@ -710,7 +710,7 @@ class KUnitMainTest(unittest.TestCase):
> >                 build_dir = '.kunit'
> >                 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)
> > +                       args=None, build_dir=build_dir, filter_glob='', filter='', timeout=300)
> >                 self.print_mock.assert_any_call(StrContains('Testing complete.'))
> >
> >         def test_run_kunitconfig(self):
> > @@ -786,7 +786,7 @@ class KUnitMainTest(unittest.TestCase):
> >                 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)
> > +                     args=['a=1','b=2'], build_dir='.kunit', filter_glob='', filter='', timeout=300)
> >                 self.print_mock.assert_any_call(StrContains('Testing complete.'))
> >
> >         def test_list_tests(self):
> > @@ -794,13 +794,11 @@ class KUnitMainTest(unittest.TestCase):
> >                 self.linux_source_mock.run_kernel.return_value = ['TAP version 14', 'init: random output'] + want
> >
> >                 got = kunit._list_tests(self.linux_source_mock,
> > -                                    kunit.KunitExecRequest(None, None, '.kunit', 300, 'suite*', None, 'suite'))
> > -
> > +                                    kunit.KunitExecRequest(None, None, '.kunit', 300, 'suite*', '', '', None, 'suite', False, False))
> >                 self.assertEqual(got, want)
> >                 # Should respect the user's filter glob when listing tests.
> >                 self.linux_source_mock.run_kernel.assert_called_once_with(
> > -                       args=['kunit.action=list'], build_dir='.kunit', filter_glob='suite*', timeout=300)
> > -
> > +                       args=['kunit.action=list'], build_dir='.kunit', filter_glob='suite*', filter='', timeout=300)
> >
> >         @mock.patch.object(kunit, '_list_tests')
> >         def test_run_isolated_by_suite(self, mock_tests):
> > @@ -809,10 +807,10 @@ class KUnitMainTest(unittest.TestCase):
> >
> >                 # Should respect the user's filter glob when listing tests.
> >                 mock_tests.assert_called_once_with(mock.ANY,
> > -                                    kunit.KunitExecRequest(None, None, '.kunit', 300, 'suite*.test*', None, 'suite'))
> > +                                    kunit.KunitExecRequest(None, None, '.kunit', 300, 'suite*.test*', '', '', None, 'suite', False, False))
> >                 self.linux_source_mock.run_kernel.assert_has_calls([
> > -                       mock.call(args=None, build_dir='.kunit', filter_glob='suite.test*', timeout=300),
> > -                       mock.call(args=None, build_dir='.kunit', filter_glob='suite2.test*', timeout=300),
> > +                       mock.call(args=None, build_dir='.kunit', filter_glob='suite.test*', filter='', timeout=300),
> > +                       mock.call(args=None, build_dir='.kunit', filter_glob='suite2.test*', filter='', timeout=300),
> >                 ])
> >
> >         @mock.patch.object(kunit, '_list_tests')
> > @@ -822,13 +820,12 @@ class KUnitMainTest(unittest.TestCase):
> >
> >                 # Should respect the user's filter glob when listing tests.
> >                 mock_tests.assert_called_once_with(mock.ANY,
> > -                                    kunit.KunitExecRequest(None, None, '.kunit', 300, 'suite*', None, 'test'))
> > +                                    kunit.KunitExecRequest(None, None, '.kunit', 300, 'suite*', '', '', None, 'test', False, False))
> >                 self.linux_source_mock.run_kernel.assert_has_calls([
> > -                       mock.call(args=None, build_dir='.kunit', filter_glob='suite.test1', timeout=300),
> > -                       mock.call(args=None, build_dir='.kunit', filter_glob='suite.test2', timeout=300),
> > -                       mock.call(args=None, build_dir='.kunit', filter_glob='suite2.test1', timeout=300),
> > +                       mock.call(args=None, build_dir='.kunit', filter_glob='suite.test1', filter='', timeout=300),
> > +                       mock.call(args=None, build_dir='.kunit', filter_glob='suite.test2', filter='', timeout=300),
> > +                       mock.call(args=None, build_dir='.kunit', filter_glob='suite2.test1', filter='', timeout=300),
> >                 ])
> >
> > -
> >  if __name__ == '__main__':
> >         unittest.main()
> > --
> > 2.41.0.255.g8b1d071c50-goog
> >

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