[PATCH v2 2/2] kunit: tool: print failed tests only

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Add flag --failed to kunit.py to print only failed tests. This printing
is done after running is over.

This patch also adds the method print_test() that will also print your
Test object. Before, all printing of tests occurred during parsing. This
method could be useful in the future when converting to/from KTAP to this
pretty-print output.

Signed-off-by: Rae Moar <rmoar@xxxxxxxxxx>
---
 tools/testing/kunit/kunit.py           | 14 ++++++++++++--
 tools/testing/kunit/kunit_parser.py    | 25 +++++++++++++++++++++++++
 tools/testing/kunit/kunit_tool_test.py |  6 +++---
 3 files changed, 40 insertions(+), 5 deletions(-)

diff --git a/tools/testing/kunit/kunit.py b/tools/testing/kunit/kunit.py
index 27c55a7fc1a0..676fa99a8b19 100755
--- a/tools/testing/kunit/kunit.py
+++ b/tools/testing/kunit/kunit.py
@@ -50,6 +50,7 @@ class KunitParseRequest:
 	raw_output: Optional[str]
 	json: Optional[str]
 	summary: bool
+	failed: bool
 
 @dataclass
 class KunitExecRequest(KunitParseRequest):
@@ -237,13 +238,15 @@ def parse_tests(request: KunitParseRequest, metadata: kunit_json.Metadata, input
 		return KunitResult(KunitStatus.SUCCESS, parse_time), fake_test
 
 	default_printer = stdout
-	if request.summary:
+	if request.summary or request.failed:
 		default_printer = null_printer
 
 	# Actually parse the test results.
 	test = kunit_parser.parse_run_tests(input_data, default_printer)
 	parse_time = time.time() - parse_start
 
+	if request.failed:
+		kunit_parser.print_test(test, request.failed, stdout)
 	kunit_parser.print_summary_line(test, stdout)
 
 	if request.json:
@@ -423,6 +426,10 @@ def add_parse_opts(parser: argparse.ArgumentParser) -> None:
 			    help='Prints only the summary line for parsed test results.'
 				'Does nothing if --raw_output is set.',
 			    action='store_true')
+	parser.add_argument('--failed',
+			    help='Prints only the failed parsed test results and summary line.'
+				'Does nothing if --raw_output is set.',
+			    action='store_true')
 
 
 def tree_from_args(cli_args: argparse.Namespace) -> kunit_kernel.LinuxSourceTree:
@@ -459,6 +466,7 @@ def run_handler(cli_args: argparse.Namespace) -> None:
 					raw_output=cli_args.raw_output,
 					json=cli_args.json,
 					summary=cli_args.summary,
+					failed=cli_args.failed,
 					timeout=cli_args.timeout,
 					filter_glob=cli_args.filter_glob,
 					filter=cli_args.filter,
@@ -507,6 +515,7 @@ def exec_handler(cli_args: argparse.Namespace) -> None:
 					build_dir=cli_args.build_dir,
 					json=cli_args.json,
 					summary=cli_args.summary,
+					failed=cli_args.failed,
 					timeout=cli_args.timeout,
 					filter_glob=cli_args.filter_glob,
 					filter=cli_args.filter,
@@ -532,7 +541,8 @@ def parse_handler(cli_args: argparse.Namespace) -> None:
 	# We know nothing about how the result was created!
 	metadata = kunit_json.Metadata()
 	request = KunitParseRequest(raw_output=cli_args.raw_output,
-					json=cli_args.json, summary=cli_args.summary)
+					json=cli_args.json, summary=cli_args.summary,
+					failed=cli_args.failed)
 	result, _ = parse_tests(request, metadata, kunit_output)
 	if result.status != KunitStatus.SUCCESS:
 		sys.exit(1)
diff --git a/tools/testing/kunit/kunit_parser.py b/tools/testing/kunit/kunit_parser.py
index 732f448263de..29fc27e8949b 100644
--- a/tools/testing/kunit/kunit_parser.py
+++ b/tools/testing/kunit/kunit_parser.py
@@ -574,7 +574,32 @@ def print_test_footer(test: Test, printer: Printer) -> None:
 	printer.print_with_timestamp(format_test_divider(message,
 		len(message) - printer.color_len()))
 
+def print_test(test: Test, failed_only: bool, printer: Printer) -> None:
+	"""
+	Prints Test object to given printer. For a child test, the result line is
+	printed. For a parent test, the test header, all child test results, and
+	the test footer are all printed. If failed_only is true, only failed/crashed
+	tests will be printed.
 
+	Parameters:
+	test - Test object to print
+	failed_only - True if only failed/crashed tests should be printed.
+	printer - Printer object to output results
+	"""
+	if test.name == "main":
+		printer.print_with_timestamp(DIVIDER)
+		for subtest in test.subtests:
+			print_test(subtest, failed_only, printer)
+		printer.print_with_timestamp(DIVIDER)
+	elif test.subtests != []:
+		if not failed_only or not test.ok_status():
+			print_test_header(test, printer)
+			for subtest in test.subtests:
+				print_test(subtest, failed_only, printer)
+			print_test_footer(test, printer)
+	else:
+		if not failed_only or not test.ok_status():
+			print_test_result(test, printer)
 
 def _summarize_failed_tests(test: Test) -> str:
 	"""Tries to summarize all the failing subtests in `test`."""
diff --git a/tools/testing/kunit/kunit_tool_test.py b/tools/testing/kunit/kunit_tool_test.py
index 02aa296d8850..0bcb0cc002f8 100755
--- a/tools/testing/kunit/kunit_tool_test.py
+++ b/tools/testing/kunit/kunit_tool_test.py
@@ -811,7 +811,7 @@ 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, False, '.kunit', 300, 'suite*', '', None, None, 'suite', False, False))
+				     kunit.KunitExecRequest(None, None, False, False, '.kunit', 300, 'suite*', '', None, 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(
@@ -824,7 +824,7 @@ 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, False, '.kunit', 300, 'suite*.test*', '', None, None, 'suite', False, False))
+				     kunit.KunitExecRequest(None, None, False, False, '.kunit', 300, 'suite*.test*', '', None, None, 'suite', False, False))
 		self.linux_source_mock.run_kernel.assert_has_calls([
 			mock.call(args=None, build_dir='.kunit', filter_glob='suite.test*', filter='', filter_action=None, timeout=300),
 			mock.call(args=None, build_dir='.kunit', filter_glob='suite2.test*', filter='', filter_action=None, timeout=300),
@@ -837,7 +837,7 @@ 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, False, '.kunit', 300, 'suite*', '', None, None, 'test', False, False))
+				     kunit.KunitExecRequest(None, None, False, False, '.kunit', 300, 'suite*', '', None, None, 'test', False, False))
 		self.linux_source_mock.run_kernel.assert_has_calls([
 			mock.call(args=None, build_dir='.kunit', filter_glob='suite.test1', filter='', filter_action=None, timeout=300),
 			mock.call(args=None, build_dir='.kunit', filter_glob='suite.test2', filter='', filter_action=None, timeout=300),
-- 
2.47.0.277.g8800431eea-goog





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