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Subject[RFC PATCH kunit-next] kunit: kunit_tool: Separate out config/build/exec/parse
From
Add new subcommands to kunit.py to allow stages of the existing 'run'
subcommand to be run independently:
- 'config': Verifies that .config is a subset of .kunitconfig
- 'build': Compiles a UML kernel for KUnit
- 'exec': Runs the kernel, and outputs the test results.
- 'parse': Parses test results from a file or stdin

Most of these are not hugely useful by themselves yet, and there's room
for plenty of bikeshedding on the names, but this hopefully can form a
foundation for future improvements.

Signed-off-by: David Gow <davidgow@google.com>
---
As was briefly disccussed in [1], this change is part of a "separation
of concerns" in kunit_tool. This should make it easier to integrate
kunit_tool into other setups.

Of particular intrest is probably 'kunit.py parse', which should allow
KUnit results to be parsed from other sources, such as after loading a
module, or from a non-UML kernel, or from debugfs when that's
supported[2].

[1]: https://lkml.org/lkml/2020/2/5/552
[2]: https://patchwork.kernel.org/patch/11419901/

tools/testing/kunit/kunit.py | 236 ++++++++++++++++++++-----
tools/testing/kunit/kunit_tool_test.py | 55 ++++++
2 files changed, 242 insertions(+), 49 deletions(-)

diff --git a/tools/testing/kunit/kunit.py b/tools/testing/kunit/kunit.py
index 180ad1e1b04f..92a634594cf6 100755
--- a/tools/testing/kunit/kunit.py
+++ b/tools/testing/kunit/kunit.py
@@ -20,8 +20,12 @@ import kunit_config
import kunit_kernel
import kunit_parser

-KunitResult = namedtuple('KunitResult', ['status','result'])
+KunitResult = namedtuple('KunitResult', ['status','result','elapsed_time'])

+KunitConfigRequest = namedtuple('KunitConfigRequest', ['build_dir', 'defconfig'])
+KunitBuildRequest = namedtuple('KunitBuildRequest', ['jobs', 'build_dir'])
+KunitExecRequest = namedtuple('KunitExecRequest', ['timeout', 'build_dir'])
+KunitParseRequest = namedtuple('KunitParseRequest', ['raw_output', 'input_data'])
KunitRequest = namedtuple('KunitRequest', ['raw_output','timeout', 'jobs', 'build_dir', 'defconfig'])

KernelDirectoryPath = sys.argv[0].split('tools/testing/kunit/')[0]
@@ -44,14 +48,25 @@ def get_kernel_root_path():
sys.exit(1)
return parts[0]

-def run_tests(linux: kunit_kernel.LinuxSourceTree,
- request: KunitRequest) -> KunitResult:
+def config_tests(linux: kunit_kernel.LinuxSourceTree,
+ request: KunitConfigRequest) -> KunitResult:
+ kunit_parser.print_with_timestamp('Configuring KUnit Kernel ...')
+
config_start = time.time()
+ if request.defconfig:
+ create_default_kunitconfig()
success = linux.build_reconfig(request.build_dir)
config_end = time.time()
if not success:
- return KunitResult(KunitStatus.CONFIG_FAILURE, 'could not configure kernel')
+ return KunitResult(KunitStatus.CONFIG_FAILURE,
+ 'could not configure kernel',
+ config_end - config_start)
+ return KunitResult(KunitStatus.SUCCESS,
+ 'configured kernel successfully',
+ config_end - config_start)

+def build_tests(linux: kunit_kernel.LinuxSourceTree,
+ request: KunitBuildRequest) -> KunitResult:
kunit_parser.print_with_timestamp('Building KUnit Kernel ...')

build_start = time.time()
@@ -59,73 +74,156 @@ def run_tests(linux: kunit_kernel.LinuxSourceTree,
build_end = time.time()
if not success:
return KunitResult(KunitStatus.BUILD_FAILURE, 'could not build kernel')
+ if not success:
+ return KunitResult(KunitStatus.BUILD_FAILURE,
+ 'could not build kernel',
+ build_end - build_start)
+ return KunitResult(KunitStatus.SUCCESS,
+ 'built kernel successfully',
+ build_end - build_start)

+def exec_tests(linux: kunit_kernel.LinuxSourceTree,
+ request: KunitExecRequest) -> KunitResult:
kunit_parser.print_with_timestamp('Starting KUnit Kernel ...')
test_start = time.time()

+ result = linux.run_kernel(timeout=request.timeout,
+ build_dir=request.build_dir)
+ test_end = time.time()
+
+ return KunitResult(KunitStatus.SUCCESS,
+ result,
+ test_end - test_start)
+
+def parse_tests(request: KunitParseRequest) -> KunitResult:
+ parse_start = time.time()
+
test_result = kunit_parser.TestResult(kunit_parser.TestStatus.SUCCESS,
[],
'Tests not Parsed.')
if request.raw_output:
- kunit_parser.raw_output(
- linux.run_kernel(timeout=request.timeout,
- build_dir=request.build_dir))
+ kunit_parser.raw_output(request.input_data)
else:
- kunit_output = linux.run_kernel(timeout=request.timeout,
- build_dir=request.build_dir)
- test_result = kunit_parser.parse_run_tests(kunit_output)
- test_end = time.time()
+ test_result = kunit_parser.parse_run_tests(request.input_data)
+ parse_end = time.time()
+
+ if test_result.status != kunit_parser.TestStatus.SUCCESS:
+ return KunitResult(KunitStatus.TEST_FAILURE, test_result,
+ parse_end - parse_start)
+
+ return KunitResult(KunitStatus.SUCCESS, test_result,
+ parse_end - parse_start)
+
+
+def run_tests(linux: kunit_kernel.LinuxSourceTree,
+ request: KunitRequest) -> KunitResult:
+ run_start = time.time()
+
+ config_request = KunitConfigRequest(request.build_dir, request.defconfig)
+ config_result = config_tests(linux, config_request)
+ if config_result.status != KunitStatus.SUCCESS:
+ return config_result
+
+ build_request = KunitBuildRequest(request.jobs, request.build_dir)
+ build_result = build_tests(linux, build_request)
+ if build_result.status != KunitStatus.SUCCESS:
+ return build_result
+
+ exec_request = KunitExecRequest(request.timeout, request.build_dir)
+ exec_result = exec_tests(linux, exec_request)
+ if exec_result.status != KunitStatus.SUCCESS:
+ return exec_result
+
+ parse_request = KunitParseRequest(request.raw_output, exec_result.result)
+ parse_result = parse_tests(parse_request)
+
+ run_end = time.time()

kunit_parser.print_with_timestamp((
'Elapsed time: %.3fs total, %.3fs configuring, %.3fs ' +
'building, %.3fs running\n') % (
- test_end - config_start,
- config_end - config_start,
- build_end - build_start,
- test_end - test_start))
+ run_end - run_start,
+ config_result.elapsed_time,
+ build_result.elapsed_time,
+ exec_result.elapsed_time))
+ return parse_result
+
+def add_common_opts(parser):
+ parser.add_argument('--build_dir',
+ help='As in the make command, it specifies the build '
+ 'directory.',
+ type=str, default='', metavar='build_dir')
+
+def add_config_opts(parser):
+ parser.add_argument('--defconfig',
+ help='Uses a default .kunitconfig.',
+ action='store_true')
+
+def add_build_opts(parser):
+ parser.add_argument('--jobs',
+ help='As in the make command, "Specifies the number of '
+ 'jobs (commands) to run simultaneously."',
+ type=int, default=8, metavar='jobs')
+
+def add_exec_opts(parser):
+ parser.add_argument('--timeout',
+ help='maximum number of seconds to allow for all tests '
+ 'to run. This does not include time taken to build the '
+ 'tests.',
+ type=int,
+ default=300,
+ metavar='timeout')
+
+def add_parse_opts(parser):
+ parser.add_argument('--raw_output', help='don\'t format output from kernel',
+ action='store_true')

- if test_result.status != kunit_parser.TestStatus.SUCCESS:
- return KunitResult(KunitStatus.TEST_FAILURE, test_result)
- else:
- return KunitResult(KunitStatus.SUCCESS, test_result)

def main(argv, linux=None):
parser = argparse.ArgumentParser(
description='Helps writing and running KUnit tests.')
subparser = parser.add_subparsers(dest='subcommand')

+ # The 'run' command will config, build, exec, and parse in one go.
run_parser = subparser.add_parser('run', help='Runs KUnit tests.')
- run_parser.add_argument('--raw_output', help='don\'t format output from kernel',
- action='store_true')
+ add_common_opts(run_parser)
+ add_config_opts(run_parser)
+ add_build_opts(run_parser)
+ add_exec_opts(run_parser)
+ add_parse_opts(run_parser)

- run_parser.add_argument('--timeout',
- help='maximum number of seconds to allow for all tests '
- 'to run. This does not include time taken to build the '
- 'tests.',
- type=int,
- default=300,
- metavar='timeout')
-
- run_parser.add_argument('--jobs',
- help='As in the make command, "Specifies the number of '
- 'jobs (commands) to run simultaneously."',
- type=int, default=8, metavar='jobs')
-
- run_parser.add_argument('--build_dir',
- help='As in the make command, it specifies the build '
- 'directory.',
- type=str, default='', metavar='build_dir')
-
- run_parser.add_argument('--defconfig',
- help='Uses a default .kunitconfig.',
- action='store_true')
+ config_parser = subparser.add_parser('config',
+ help='Ensures that .config contains all of '
+ 'the options in .kunitconfig')
+ add_common_opts(config_parser)
+ add_config_opts(config_parser)

- cli_args = parser.parse_args(argv)
+ build_parser = subparser.add_parser('build', help='Builds a kernel with KUnit tests')
+ add_common_opts(build_parser)
+ add_build_opts(build_parser)

- if cli_args.subcommand == 'run':
- if get_kernel_root_path():
- os.chdir(get_kernel_root_path())
+ exec_parser = subparser.add_parser('exec', help='Run a kernel with KUnit tests')
+ add_common_opts(exec_parser)
+ add_exec_opts(exec_parser)
+ add_parse_opts(exec_parser)
+
+ # The 'parse' option is special, as it doesn't need the kernel source
+ # (therefore there is no need for a build_dir, hence no add_common_opts)
+ # and the '--file' argument is not relevant to 'run', so isn't in
+ # add_parse_opts()
+ parse_parser = subparser.add_parser('parse',
+ help='Parses KUnit results from a file, '
+ 'and parses formatted results.')
+ add_parse_opts(parse_parser)
+ parse_parser.add_argument('file',
+ help='Specifies the file to read results from.',
+ type=str, default='-', metavar='input_file')
+
+ cli_args = parser.parse_args(argv)

+ # Set up the build_dir and source tree for commands which use it
+ # (everything but 'parse')
+ if cli_args.subcommand != 'parse':
if cli_args.build_dir:
if not os.path.exists(cli_args.build_dir):
os.mkdir(cli_args.build_dir)
@@ -133,12 +231,11 @@ def main(argv, linux=None):
cli_args.build_dir,
kunit_kernel.kunitconfig_path)

- if cli_args.defconfig:
- create_default_kunitconfig()
-
if not linux:
linux = kunit_kernel.LinuxSourceTree()

+
+ if cli_args.subcommand == 'run':
request = KunitRequest(cli_args.raw_output,
cli_args.timeout,
cli_args.jobs,
@@ -147,6 +244,47 @@ def main(argv, linux=None):
result = run_tests(linux, request)
if result.status != KunitStatus.SUCCESS:
sys.exit(1)
+ elif cli_args.subcommand == 'config':
+ request = KunitConfigRequest(cli_args.build_dir,
+ cli_args.defconfig)
+ result = config_tests(linux, request)
+ kunit_parser.print_with_timestamp((
+ 'Elapsed time: %.3fs\n') % (
+ result.elapsed_time))
+ if result.status != KunitStatus.SUCCESS:
+ sys.exit(1)
+ elif cli_args.subcommand == 'build':
+ request = KunitBuildRequest(cli_args.jobs,
+ cli_args.build_dir)
+ result = build_tests(linux, request)
+ kunit_parser.print_with_timestamp((
+ 'Elapsed time: %.3fs\n') % (
+ result.elapsed_time))
+ if result.status != KunitStatus.SUCCESS:
+ sys.exit(1)
+ elif cli_args.subcommand == 'exec':
+ exec_request = KunitExecRequest(cli_args.timeout,
+ cli_args.build_dir)
+ exec_result = exec_tests(linux, exec_request)
+ parse_request = KunitParseRequest(cli_args.raw_output,
+ exec_result.result)
+ result = parse_tests(parse_request)
+ kunit_parser.print_with_timestamp((
+ 'Elapsed time: %.3fs\n') % (
+ exec_result.elapsed_time))
+ if result.status != KunitStatus.SUCCESS:
+ sys.exit(1)
+ elif cli_args.subcommand == 'parse':
+ if cli_args.file == '-':
+ kunit_output = sys.stdin
+ else:
+ with open(cli_args.file, 'r') as f:
+ kunit_output = f.read().splitlines()
+ request = KunitParseRequest(cli_args.raw_output,
+ kunit_output)
+ result = parse_tests(request)
+ if result.status != KunitStatus.SUCCESS:
+ sys.exit(1)
else:
parser.print_help()

diff --git a/tools/testing/kunit/kunit_tool_test.py b/tools/testing/kunit/kunit_tool_test.py
index cba97756ac4a..0d04425ead04 100755
--- a/tools/testing/kunit/kunit_tool_test.py
+++ b/tools/testing/kunit/kunit_tool_test.py
@@ -170,6 +170,24 @@ class KUnitMainTest(unittest.TestCase):
self.print_patch.stop()
pass

+ def test_config_passes_args_pass(self):
+ kunit.main(['config'], self.linux_source_mock)
+ assert self.linux_source_mock.build_reconfig.call_count == 1
+ assert self.linux_source_mock.run_kernel.call_count == 0
+
+ def test_build_passes_args_pass(self):
+ kunit.main(['build'], self.linux_source_mock)
+ assert self.linux_source_mock.build_reconfig.call_count == 0
+ self.linux_source_mock.build_um_kernel.assert_called_once_with(8, '')
+ assert self.linux_source_mock.run_kernel.call_count == 0
+
+ def test_exec_passes_args_pass(self):
+ kunit.main(['exec'], self.linux_source_mock)
+ assert self.linux_source_mock.build_reconfig.call_count == 0
+ assert self.linux_source_mock.run_kernel.call_count == 1
+ self.linux_source_mock.run_kernel.assert_called_once_with(build_dir='', timeout=300)
+ self.print_mock.assert_any_call(StrContains('Testing complete.'))
+
def test_run_passes_args_pass(self):
kunit.main(['run'], self.linux_source_mock)
assert self.linux_source_mock.build_reconfig.call_count == 1
@@ -177,6 +195,13 @@ class KUnitMainTest(unittest.TestCase):
self.linux_source_mock.run_kernel.assert_called_once_with(build_dir='', timeout=300)
self.print_mock.assert_any_call(StrContains('Testing complete.'))

+ 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)
+ assert type(e.exception) == SystemExit
+ assert 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:
@@ -187,6 +212,14 @@ class KUnitMainTest(unittest.TestCase):
assert self.linux_source_mock.run_kernel.call_count == 1
self.print_mock.assert_any_call(StrContains(' 0 tests run'))

+ 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)
+ assert self.linux_source_mock.run_kernel.call_count == 1
+ for kall in self.print_mock.call_args_list:
+ assert kall != mock.call(StrContains('Testing complete.'))
+ assert kall != mock.call(StrContains(' 0 tests run'))
+
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)
@@ -196,6 +229,12 @@ class KUnitMainTest(unittest.TestCase):
assert kall != mock.call(StrContains('Testing complete.'))
assert kall != mock.call(StrContains(' 0 tests run'))

+ def test_exec_timeout(self):
+ timeout = 3453
+ kunit.main(['exec', '--timeout', str(timeout)], self.linux_source_mock)
+ self.linux_source_mock.run_kernel.assert_called_once_with(build_dir='', 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)
@@ -210,5 +249,21 @@ class KUnitMainTest(unittest.TestCase):
self.linux_source_mock.run_kernel.assert_called_once_with(build_dir=build_dir, timeout=300)
self.print_mock.assert_any_call(StrContains('Testing complete.'))

+ def test_config_builddir(self):
+ build_dir = '.kunit'
+ kunit.main(['config', '--build_dir', build_dir], self.linux_source_mock)
+ assert self.linux_source_mock.build_reconfig.call_count == 1
+
+ def test_build_builddir(self):
+ build_dir = '.kunit'
+ kunit.main(['build', '--build_dir', build_dir], self.linux_source_mock)
+ self.linux_source_mock.build_um_kernel.assert_called_once_with(8, build_dir)
+
+ def test_exec_builddir(self):
+ build_dir = '.kunit'
+ kunit.main(['exec', '--build_dir', build_dir], self.linux_source_mock)
+ self.linux_source_mock.run_kernel.assert_called_once_with(build_dir=build_dir, timeout=300)
+ self.print_mock.assert_any_call(StrContains('Testing complete.'))
+
if __name__ == '__main__':
unittest.main()
--
2.25.1.481.gfbce0eb801-goog
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