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authorDaniel Latypov <dlatypov@google.com>2021-10-01 01:20:48 +0300
committerShuah Khan <skhan@linuxfoundation.org>2021-10-19 23:21:08 +0300
commitff9e09a3762fbd7aba83cfd1530972b57ae52b3b (patch)
treedac7ce90b513001b8a094c1868759960307078d0 /tools/testing/kunit
parent5f6aa6d82e45d27f00f39844749ae812c7fd6ab3 (diff)
downloadlinux-ff9e09a3762fbd7aba83cfd1530972b57ae52b3b.tar.xz
kunit: tool: support running each suite/test separately
The new --run_isolated flag makes the tool boot the kernel once per suite or test, preventing leftover state from one suite to impact the other. This can be useful as a starting point to debugging test hermeticity issues. Note: it takes a lot longer, so people should not use it normally. Consider the following very simplified example: bool disable_something_for_test = false; void function_being_tested() { ... if (disable_something_for_test) return; ... } static void test_before(struct kunit *test) { disable_something_for_test = true; function_being_tested(); /* oops, we forgot to reset it back to false */ } static void test_after(struct kunit *test) { /* oops, now "fixing" test_before can cause test_after to fail! */ function_being_tested(); } Presented like this, the issues are obvious, but it gets a lot more complicated to track down as the amount of test setup and helper functions increases. Another use case is memory corruption. It might not be surfaced as a failure/crash in the test case or suite that caused it. I've noticed in kunit's own unit tests, the 3rd suite after might be the one to finally crash after an out-of-bounds write, for example. Example usage: Per suite: $ ./tools/testing/kunit/kunit.py run --kunitconfig=lib/kunit --run_isolated=suite ... Starting KUnit Kernel (1/7)... ============================================================ ======== [PASSED] kunit_executor_test ======== .... Testing complete. 5 tests run. 0 failed. 0 crashed. 0 skipped. Starting KUnit Kernel (2/7)... ============================================================ ======== [PASSED] kunit-try-catch-test ======== ... Per test: $ ./tools/testing/kunit/kunit.py run --kunitconfig=lib/kunit --run_isolated=test Starting KUnit Kernel (1/23)... ============================================================ ======== [PASSED] kunit_executor_test ======== [PASSED] parse_filter_test ============================================================ Testing complete. 1 tests run. 0 failed. 0 crashed. 0 skipped. Starting KUnit Kernel (2/23)... ============================================================ ======== [PASSED] kunit_executor_test ======== [PASSED] filter_subsuite_test ... It works with filters as well: $ ./tools/testing/kunit/kunit.py run --kunitconfig=lib/kunit --run_isolated=suite example ... Starting KUnit Kernel (1/1)... ============================================================ ======== [PASSED] example ======== ... It also handles test filters, '*.*skip*' runs these 3 tests: kunit_status.kunit_status_mark_skipped_test example.example_skip_test example.example_mark_skipped_test Fixed up merge conflict between: d8c23ead708b ("kunit: tool: better handling of quasi-bool args (--json, --raw_output)") and 6710951ee039 ("kunit: tool: support running each suite/test separately") Reported-by: Stephen Rothwell <sfr@canb.auug.org.au> Shuah Khan <skhan@linuxfoundation.org> Signed-off-by: Daniel Latypov <dlatypov@google.com> Reviewed-by: David Gow <davidgow@google.com> Reviewed-by: Brendan Higgins <brendanhiggins@google.com> Signed-off-by: Shuah Khan <skhan@linuxfoundation.org>
Diffstat (limited to 'tools/testing/kunit')
-rwxr-xr-xtools/testing/kunit/kunit.py100
-rwxr-xr-xtools/testing/kunit/kunit_tool_test.py40
2 files changed, 118 insertions, 22 deletions
diff --git a/tools/testing/kunit/kunit.py b/tools/testing/kunit/kunit.py
index 1c495d8ce189..868b3995c222 100755
--- a/tools/testing/kunit/kunit.py
+++ b/tools/testing/kunit/kunit.py
@@ -8,15 +8,16 @@
# Author: Brendan Higgins <brendanhiggins@google.com>
import argparse
-import sys
import os
+import re
+import sys
import time
assert sys.version_info >= (3, 7), "Python version is too old"
from collections import namedtuple
from enum import Enum, auto
-from typing import Iterable, Sequence
+from typing import Iterable, Sequence, List
import kunit_json
import kunit_kernel
@@ -30,13 +31,13 @@ KunitBuildRequest = namedtuple('KunitBuildRequest',
['jobs', 'build_dir', 'alltests',
'make_options'])
KunitExecRequest = namedtuple('KunitExecRequest',
- ['timeout', 'build_dir', 'alltests',
- 'filter_glob', 'kernel_args'])
+ ['timeout', 'build_dir', 'alltests',
+ 'filter_glob', 'kernel_args', 'run_isolated'])
KunitParseRequest = namedtuple('KunitParseRequest',
['raw_output', 'build_dir', 'json'])
KunitRequest = namedtuple('KunitRequest', ['raw_output','timeout', 'jobs',
'build_dir', 'alltests', 'filter_glob',
- 'kernel_args', 'json', 'make_options'])
+ 'kernel_args', 'run_isolated', 'json', 'make_options'])
KernelDirectoryPath = sys.argv[0].split('tools/testing/kunit/')[0]
@@ -90,23 +91,70 @@ def build_tests(linux: kunit_kernel.LinuxSourceTree,
'built kernel successfully',
build_end - build_start)
+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=None if request.alltests else request.timeout,
+ filter_glob=request.filter_glob,
+ 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('^[^\s.]+\.[^\s.]+$', l)]
+
+def _suites_from_test_list(tests: List[str]) -> List[str]:
+ """Extracts all the suites from an ordered list of tests."""
+ suites = [] # type: List[str]
+ for t in tests:
+ parts = t.split('.', maxsplit=2)
+ if len(parts) != 2:
+ raise ValueError(f'internal KUnit error, test name should be of the form "<suite>.<test>", got "{t}"')
+ suite, case = parts
+ if not suites or suites[-1] != suite:
+ suites.append(suite)
+ return suites
+
+
+
def exec_tests(linux: kunit_kernel.LinuxSourceTree, request: KunitExecRequest,
parse_request: KunitParseRequest) -> KunitResult:
- kunit_parser.print_with_timestamp('Starting KUnit Kernel ...')
- test_start = time.time()
- run_result = linux.run_kernel(
- args=request.kernel_args,
- timeout=None if request.alltests else request.timeout,
- filter_glob=request.filter_glob,
- build_dir=request.build_dir)
-
- result = parse_tests(parse_request, run_result)
-
- # run_kernel() doesn't block on the kernel exiting.
- # That only happens after we get the last line of output from `run_result`.
- # So exec_time here actually contains parsing + execution time, which is fine.
- test_end = time.time()
- exec_time = test_end - test_start
+ filter_globs = [request.filter_glob]
+ if request.run_isolated:
+ tests = _list_tests(linux, request)
+ if request.run_isolated == 'test':
+ filter_globs = tests
+ if request.run_isolated == 'suite':
+ filter_globs = _suites_from_test_list(tests)
+ # Apply the test-part of the user's glob, if present.
+ if '.' in request.filter_glob:
+ test_glob = request.filter_glob.split('.', maxsplit=2)[1]
+ filter_globs = [g + '.'+ test_glob for g in filter_globs]
+
+ overall_status = kunit_parser.TestStatus.SUCCESS
+ exec_time = 0.0
+ for i, filter_glob in enumerate(filter_globs):
+ kunit_parser.print_with_timestamp('Starting KUnit Kernel ({}/{})...'.format(i+1, len(filter_globs)))
+
+ test_start = time.time()
+ run_result = linux.run_kernel(
+ args=request.kernel_args,
+ timeout=None if request.alltests else request.timeout,
+ filter_glob=filter_glob,
+ build_dir=request.build_dir)
+
+ result = parse_tests(parse_request, run_result)
+ # run_kernel() doesn't block on the kernel exiting.
+ # That only happens after we get the last line of output from `run_result`.
+ # So exec_time here actually contains parsing + execution time, which is fine.
+ test_end = time.time()
+ exec_time += test_end - test_start
+
+ overall_status = kunit_parser.max_status(overall_status, result.status)
return KunitResult(status=result.status, result=result.result, elapsed_time=exec_time)
@@ -167,7 +215,7 @@ def run_tests(linux: kunit_kernel.LinuxSourceTree,
exec_request = KunitExecRequest(request.timeout, request.build_dir,
request.alltests, request.filter_glob,
- request.kernel_args)
+ request.kernel_args, request.run_isolated)
parse_request = KunitParseRequest(request.raw_output,
request.build_dir,
request.json)
@@ -271,6 +319,12 @@ def add_exec_opts(parser) -> None:
parser.add_argument('--kernel_args',
help='Kernel command-line parameters. Maybe be repeated',
action='append')
+ parser.add_argument('--run_isolated', help='If set, boot the kernel for each '
+ 'individual suite/test. This is can be useful for debugging '
+ 'a non-hermetic test, one that might pass/fail based on '
+ 'what ran before it.',
+ type=str,
+ choices=['suite', 'test']),
def add_parse_opts(parser) -> None:
parser.add_argument('--raw_output', help='If set don\'t format output from kernel. '
@@ -344,6 +398,7 @@ def main(argv, linux=None):
cli_args.alltests,
cli_args.filter_glob,
cli_args.kernel_args,
+ cli_args.run_isolated,
cli_args.json,
cli_args.make_options)
result = run_tests(linux, request)
@@ -399,7 +454,8 @@ def main(argv, linux=None):
cli_args.build_dir,
cli_args.alltests,
cli_args.filter_glob,
- cli_args.kernel_args)
+ cli_args.kernel_args,
+ cli_args.run_isolated)
parse_request = KunitParseRequest(cli_args.raw_output,
cli_args.build_dir,
cli_args.json)
diff --git a/tools/testing/kunit/kunit_tool_test.py b/tools/testing/kunit/kunit_tool_test.py
index 1116882ddf69..d696a63d4248 100755
--- a/tools/testing/kunit/kunit_tool_test.py
+++ b/tools/testing/kunit/kunit_tool_test.py
@@ -487,6 +487,46 @@ class KUnitMainTest(unittest.TestCase):
args=['a=1','b=2'], build_dir='.kunit', filter_glob='', timeout=300)
self.print_mock.assert_any_call(StrContains('Testing complete.'))
+ def test_list_tests(self):
+ want = ['suite.test1', 'suite.test2', 'suite2.test1']
+ 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(300, '.kunit', False, 'suite*', None, 'suite'))
+
+ 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)
+
+
+ @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)
+
+ # Should respect the user's filter glob when listing tests.
+ mock_tests.assert_called_once_with(mock.ANY,
+ kunit.KunitExecRequest(300, '.kunit', False, 'suite*.test*', None, 'suite'))
+ 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.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)
+
+ # Should respect the user's filter glob when listing tests.
+ mock_tests.assert_called_once_with(mock.ANY,
+ kunit.KunitExecRequest(300, '.kunit', False, 'suite*', None, 'test'))
+ 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),
+ ])
+
if __name__ == '__main__':
unittest.main()