Merge tag 'linux-kselftest-kunit-next-6.2-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest

Pull KUnit updates from Shuah Khan:
 "Several enhancements, fixes, clean-ups, documentation updates,
  improvements to logging and KTAP compliance of KUnit test output:

   - log numbers in decimal and hex

   - parse KTAP compliant test output

   - allow conditionally exposing static symbols to tests when KUNIT is
     enabled

   - make static symbols visible during kunit testing

   - clean-ups to remove unused structure definition"

* tag 'linux-kselftest-kunit-next-6.2-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest: (29 commits)
  Documentation: dev-tools: Clarify requirements for result description
  apparmor: test: make static symbols visible during kunit testing
  kunit: add macro to allow conditionally exposing static symbols to tests
  kunit: tool: make parser preserve whitespace when printing test log
  Documentation: kunit: Fix "How Do I Use This" / "Next Steps" sections
  kunit: tool: don't include KTAP headers and the like in the test log
  kunit: improve KTAP compliance of KUnit test output
  kunit: tool: parse KTAP compliant test output
  mm: slub: test: Use the kunit_get_current_test() function
  kunit: Use the static key when retrieving the current test
  kunit: Provide a static key to check if KUnit is actively running tests
  kunit: tool: make --json do nothing if --raw_ouput is set
  kunit: tool: tweak error message when no KTAP found
  kunit: remove KUNIT_INIT_MEM_ASSERTION macro
  Documentation: kunit: Remove redundant 'tips.rst' page
  Documentation: KUnit: reword description of assertions
  Documentation: KUnit: make usage.rst a superset of tips.rst, remove duplication
  kunit: eliminate KUNIT_INIT_*_ASSERT_STRUCT macros
  kunit: tool: remove redundant file.close() call in unit test
  kunit: tool: unit tests all check parser errors, standardize formatting a bit
  ...

5 files changed, 260 insertions, 143 deletions

diff --git a/tools/testing/kunit/kunit.py b/tools/testing/kunit/kunit.py
index 4d4663fb578b..43fbe96318fe 100755
--- a/tools/testing/kunit/kunit.py
+++ b/tools/testing/kunit/kunit.py
@@ -192,28 +192,30 @@ def _map_to_overall_status(test_status: kunit_parser.TestStatus) -> KunitStatus:
 def parse_tests(request: KunitParseRequest, metadata: kunit_json.Metadata, input_data: Iterable[str]) -> Tuple[KunitResult, kunit_parser.Test]:
 	parse_start = time.time()
 
-	test_result = kunit_parser.Test()
-
 	if request.raw_output:
 		# Treat unparsed results as one passing test.
-		test_result.status = kunit_parser.TestStatus.SUCCESS
-		test_result.counts.passed = 1
+		fake_test = kunit_parser.Test()
+		fake_test.status = kunit_parser.TestStatus.SUCCESS
+		fake_test.counts.passed = 1
 
 		output: Iterable[str] = input_data
 		if request.raw_output == 'all':
 			pass
 		elif request.raw_output == 'kunit':
-			output = kunit_parser.extract_tap_lines(output, lstrip=False)
+			output = kunit_parser.extract_tap_lines(output)
 		for line in output:
 			print(line.rstrip())
+		parse_time = time.time() - parse_start
+		return KunitResult(KunitStatus.SUCCESS, parse_time), fake_test
 
-	else:
-		test_result = kunit_parser.parse_run_tests(input_data)
-	parse_end = time.time()
+
+	# Actually parse the test results.
+	test = kunit_parser.parse_run_tests(input_data)
+	parse_time = time.time() - parse_start
 
 	if request.json:
 		json_str = kunit_json.get_json_result(
-					test=test_result,
+					test=test,
 					metadata=metadata)
 		if request.json == 'stdout':
 			print(json_str)
@@ -223,10 +225,10 @@ def parse_tests(request: KunitParseRequest, metadata: kunit_json.Metadata, input
 			stdout.print_with_timestamp("Test results stored in %s" %
 				os.path.abspath(request.json))
 
-	if test_result.status != kunit_parser.TestStatus.SUCCESS:
-		return KunitResult(KunitStatus.TEST_FAILURE, parse_end - parse_start), test_result
+	if test.status != kunit_parser.TestStatus.SUCCESS:
+		return KunitResult(KunitStatus.TEST_FAILURE, parse_time), test
 
-	return KunitResult(KunitStatus.SUCCESS, parse_end - parse_start), test_result
+	return KunitResult(KunitStatus.SUCCESS, parse_time), test
 
 def run_tests(linux: kunit_kernel.LinuxSourceTree,
 	      request: KunitRequest) -> KunitResult:
@@ -359,14 +361,14 @@ def add_exec_opts(parser) -> None:
 			    choices=['suite', 'test'])
 
 def add_parse_opts(parser) -> None:
-	parser.add_argument('--raw_output', help='If set don\'t format output from kernel. '
-			    'If set to --raw_output=kunit, filters to just KUnit output.',
+	parser.add_argument('--raw_output', help='If set don\'t parse output from kernel. '
+			    'By default, filters to just KUnit output. Use '
+			    '--raw_output=all to show everything',
 			     type=str, nargs='?', const='all', default=None, choices=['all', 'kunit'])
 	parser.add_argument('--json',
 			    nargs='?',
-			    help='Stores test results in a JSON, and either '
-			    'prints to stdout or saves to file if a '
-			    'filename is specified',
+			    help='Prints parsed test results as JSON to stdout or a file if '
+			    'a filename is specified. Does nothing if --raw_output is set.',
 			    type=str, const='stdout', default=None, metavar='FILE')
 
 
diff --git a/tools/testing/kunit/kunit_parser.py b/tools/testing/kunit/kunit_parser.py
index 1ae873e3e341..a225799f6b1b 100644
--- a/tools/testing/kunit/kunit_parser.py
+++ b/tools/testing/kunit/kunit_parser.py
@@ -10,8 +10,10 @@
 # Author: Rae Moar <rmoar@google.com>
 
 from __future__ import annotations
+from dataclasses import dataclass
 import re
 import sys
+import textwrap
 
 from enum import Enum, auto
 from typing import Iterable, Iterator, List, Optional, Tuple
@@ -58,6 +60,10 @@ class Test:
 		self.counts.errors += 1
 		stdout.print_with_timestamp(stdout.red('[ERROR]') + f' Test: {self.name}: {error_message}')
 
+	def ok_status(self) -> bool:
+		"""Returns true if the status was ok, i.e. passed or skipped."""
+		return self.status in (TestStatus.SUCCESS, TestStatus.SKIPPED)
+
 class TestStatus(Enum):
 	"""An enumeration class to represent the status of a test."""
 	SUCCESS = auto()
@@ -67,27 +73,17 @@ class TestStatus(Enum):
 	NO_TESTS = auto()
 	FAILURE_TO_PARSE_TESTS = auto()
 
+@dataclass
 class TestCounts:
 	"""
 	Tracks the counts of statuses of all test cases and any errors within
 	a Test.
-
-	Attributes:
-	passed : int - the number of tests that have passed
-	failed : int - the number of tests that have failed
-	crashed : int - the number of tests that have crashed
-	skipped : int - the number of tests that have skipped
-	errors : int - the number of errors in the test and subtests
-	"""
-	def __init__(self):
-		"""Creates TestCounts object with counts of all test
-		statuses and test errors set to 0.
-		"""
-		self.passed = 0
-		self.failed = 0
-		self.crashed = 0
-		self.skipped = 0
-		self.errors = 0
+	"""
+	passed: int = 0
+	failed: int = 0
+	crashed: int = 0
+	skipped: int = 0
+	errors: int = 0
 
 	def __str__(self) -> str:
 		"""Returns the string representation of a TestCounts object."""
@@ -213,12 +209,12 @@ class LineStream:
 
 # Parsing helper methods:
 
-KTAP_START = re.compile(r'KTAP version ([0-9]+)$')
-TAP_START = re.compile(r'TAP version ([0-9]+)$')
-KTAP_END = re.compile('(List of all partitions:|'
+KTAP_START = re.compile(r'\s*KTAP version ([0-9]+)$')
+TAP_START = re.compile(r'\s*TAP version ([0-9]+)$')
+KTAP_END = re.compile(r'\s*(List of all partitions:|'
 	'Kernel panic - not syncing: VFS:|reboot: System halted)')
 
-def extract_tap_lines(kernel_output: Iterable[str], lstrip=True) -> LineStream:
+def extract_tap_lines(kernel_output: Iterable[str]) -> LineStream:
 	"""Extracts KTAP lines from the kernel output."""
 	def isolate_ktap_output(kernel_output: Iterable[str]) \
 			-> Iterator[Tuple[int, str]]:
@@ -244,11 +240,8 @@ def extract_tap_lines(kernel_output: Iterable[str], lstrip=True) -> LineStream:
 				# stop extracting KTAP lines
 				break
 			elif started:
-				# remove the prefix and optionally any leading
-				# whitespace. Our parsing logic relies on this.
+				# remove the prefix, if any.
 				line = line[prefix_len:]
-				if lstrip:
-					line = line.lstrip()
 				yield line_num, line
 	return LineStream(lines=isolate_ktap_output(kernel_output))
 
@@ -300,10 +293,10 @@ def parse_ktap_header(lines: LineStream, test: Test) -> bool:
 		check_version(version_num, TAP_VERSIONS, 'TAP', test)
 	else:
 		return False
-	test.log.append(lines.pop())
+	lines.pop()
 	return True
 
-TEST_HEADER = re.compile(r'^# Subtest: (.*)$')
+TEST_HEADER = re.compile(r'^\s*# Subtest: (.*)$')
 
 def parse_test_header(lines: LineStream, test: Test) -> bool:
 	"""
@@ -323,11 +316,11 @@ def parse_test_header(lines: LineStream, test: Test) -> bool:
 	match = TEST_HEADER.match(lines.peek())
 	if not match:
 		return False
-	test.log.append(lines.pop())
 	test.name = match.group(1)
+	lines.pop()
 	return True
 
-TEST_PLAN = re.compile(r'1\.\.([0-9]+)')
+TEST_PLAN = re.compile(r'^\s*1\.\.([0-9]+)')
 
 def parse_test_plan(lines: LineStream, test: Test) -> bool:
 	"""
@@ -350,14 +343,14 @@ def parse_test_plan(lines: LineStream, test: Test) -> bool:
 	if not match:
 		test.expected_count = None
 		return False
-	test.log.append(lines.pop())
 	expected_count = int(match.group(1))
 	test.expected_count = expected_count
+	lines.pop()
 	return True
 
-TEST_RESULT = re.compile(r'^(ok|not ok) ([0-9]+) (- )?([^#]*)( # .*)?$')
+TEST_RESULT = re.compile(r'^\s*(ok|not ok) ([0-9]+) (- )?([^#]*)( # .*)?$')
 
-TEST_RESULT_SKIP = re.compile(r'^(ok|not ok) ([0-9]+) (- )?(.*) # SKIP(.*)$')
+TEST_RESULT_SKIP = re.compile(r'^\s*(ok|not ok) ([0-9]+) (- )?(.*) # SKIP(.*)$')
 
 def peek_test_name_match(lines: LineStream, test: Test) -> bool:
 	"""
@@ -414,7 +407,7 @@ def parse_test_result(lines: LineStream, test: Test,
 	# Check if line matches test result line format
 	if not match:
 		return False
-	test.log.append(lines.pop())
+	lines.pop()
 
 	# Set name of test object
 	if skip_match:
@@ -446,6 +439,7 @@ def parse_diagnostic(lines: LineStream) -> List[str]:
 	- '# Subtest: [test name]'
 	- '[ok|not ok] [test number] [-] [test name] [optional skip
 		directive]'
+	- 'KTAP version [version number]'
 
 	Parameters:
 	lines - LineStream of KTAP output to parse
@@ -454,8 +448,9 @@ def parse_diagnostic(lines: LineStream) -> List[str]:
 	Log of diagnostic lines
 	"""
 	log = []  # type: List[str]
-	while lines and not TEST_RESULT.match(lines.peek()) and not \
-			TEST_HEADER.match(lines.peek()):
+	non_diagnostic_lines = [TEST_RESULT, TEST_HEADER, KTAP_START]
+	while lines and not any(re.match(lines.peek())
+			for re in non_diagnostic_lines):
 		log.append(lines.pop())
 	return log
 
@@ -501,17 +496,22 @@ def print_test_header(test: Test) -> None:
 	test - Test object representing current test being printed
 	"""
 	message = test.name
+	if message != "":
+		# Add a leading space before the subtest counts only if a test name
+		# is provided using a "# Subtest" header line.
+		message += " "
 	if test.expected_count:
 		if test.expected_count == 1:
-			message += ' (1 subtest)'
+			message += '(1 subtest)'
 		else:
-			message += f' ({test.expected_count} subtests)'
+			message += f'({test.expected_count} subtests)'
 	stdout.print_with_timestamp(format_test_divider(message, len(message)))
 
 def print_log(log: Iterable[str]) -> None:
 	"""Prints all strings in saved log for test in yellow."""
-	for m in log:
-		stdout.print_with_timestamp(stdout.yellow(m))
+	formatted = textwrap.dedent('\n'.join(log))
+	for line in formatted.splitlines():
+		stdout.print_with_timestamp(stdout.yellow(line))
 
 def format_test_result(test: Test) -> str:
 	"""
@@ -565,6 +565,40 @@ def print_test_footer(test: Test) -> None:
 	stdout.print_with_timestamp(format_test_divider(message,
 		len(message) - stdout.color_len()))
 
+
+
+def _summarize_failed_tests(test: Test) -> str:
+	"""Tries to summarize all the failing subtests in `test`."""
+
+	def failed_names(test: Test, parent_name: str) -> List[str]:
+		# Note: we use 'main' internally for the top-level test.
+		if not parent_name or parent_name == 'main':
+			full_name = test.name
+		else:
+			full_name = parent_name + '.' + test.name
+
+		if not test.subtests:  # this is a leaf node
+			return [full_name]
+
+		# If all the children failed, just say this subtest failed.
+		# Don't summarize it down "the top-level test failed", though.
+		failed_subtests = [sub for sub in test.subtests if not sub.ok_status()]
+		if parent_name and len(failed_subtests) ==  len(test.subtests):
+			return [full_name]
+
+		all_failures = []  # type: List[str]
+		for t in failed_subtests:
+			all_failures.extend(failed_names(t, full_name))
+		return all_failures
+
+	failures = failed_names(test, '')
+	# If there are too many failures, printing them out will just be noisy.
+	if len(failures) > 10:  # this is an arbitrary limit
+		return ''
+
+	return 'Failures: ' + ', '.join(failures)
+
+
 def print_summary_line(test: Test) -> None:
 	"""
 	Prints summary line of test object. Color of line is dependent on
@@ -587,6 +621,15 @@ def print_summary_line(test: Test) -> None:
 		color = stdout.red
 	stdout.print_with_timestamp(color(f'Testing complete. {test.counts}'))
 
+	# Summarize failures that might have gone off-screen since we had a lot
+	# of tests (arbitrarily defined as >=100 for now).
+	if test.ok_status() or test.counts.total() < 100:
+		return
+	summarized = _summarize_failed_tests(test)
+	if not summarized:
+		return
+	stdout.print_with_timestamp(color(summarized))
+
 # Other methods:
 
 def bubble_up_test_results(test: Test) -> None:
@@ -609,7 +652,7 @@ def bubble_up_test_results(test: Test) -> None:
 	elif test.counts.get_status() == TestStatus.TEST_CRASHED:
 		test.status = TestStatus.TEST_CRASHED
 
-def parse_test(lines: LineStream, expected_num: int, log: List[str]) -> Test:
+def parse_test(lines: LineStream, expected_num: int, log: List[str], is_subtest: bool) -> Test:
 	"""
 	Finds next test to parse in LineStream, creates new Test object,
 	parses any subtests of the test, populates Test object with all
@@ -627,15 +670,32 @@ def parse_test(lines: LineStream, expected_num: int, log: List[str]) -> Test:
 	1..4
 	[subtests]
 
-	- Subtest header line
+	- Subtest header (must include either the KTAP version line or
+	  "# Subtest" header line)
 
-	Example:
+	Example (preferred format with both KTAP version line and
+	"# Subtest" line):
 
+	KTAP version 1
 	# Subtest: name
 	1..3
 	[subtests]
 	ok 1 name
 
+	Example (only "# Subtest" line):
+
+	# Subtest: name
+	1..3
+	[subtests]
+	ok 1 name
+
+	Example (only KTAP version line, compliant with KTAP v1 spec):
+
+	KTAP version 1
+	1..3
+	[subtests]
+	ok 1 name
+
 	- Test result line
 
 	Example:
@@ -647,28 +707,29 @@ def parse_test(lines: LineStream, expected_num: int, log: List[str]) -> Test:
 	expected_num - expected test number for test to be parsed
 	log - list of strings containing any preceding diagnostic lines
 		corresponding to the current test
+	is_subtest - boolean indicating whether test is a subtest
 
 	Return:
 	Test object populated with characteristics and any subtests
 	"""
 	test = Test()
 	test.log.extend(log)
-	parent_test = False
-	main = parse_ktap_header(lines, test)
-	if main:
-		# If KTAP/TAP header is found, attempt to parse
+	if not is_subtest:
+		# If parsing the main/top-level test, parse KTAP version line and
 		# test plan
 		test.name = "main"
+		ktap_line = parse_ktap_header(lines, test)
 		parse_test_plan(lines, test)
 		parent_test = True
 	else:
-		# If KTAP/TAP header is not found, test must be subtest
-		# header or test result line so parse attempt to parser
-		# subtest header
-		parent_test = parse_test_header(lines, test)
+		# If not the main test, attempt to parse a test header containing
+		# the KTAP version line and/or subtest header line
+		ktap_line = parse_ktap_header(lines, test)
+		subtest_line = parse_test_header(lines, test)
+		parent_test = (ktap_line or subtest_line)
 		if parent_test:
-			# If subtest header is found, attempt to parse
-			# test plan and print header
+			# If KTAP version line and/or subtest header is found, attempt
+			# to parse test plan and print test header
 			parse_test_plan(lines, test)
 			print_test_header(test)
 	expected_count = test.expected_count
@@ -683,7 +744,7 @@ def parse_test(lines: LineStream, expected_num: int, log: List[str]) -> Test:
 		sub_log = parse_diagnostic(lines)
 		sub_test = Test()
 		if not lines or (peek_test_name_match(lines, test) and
-				not main):
+				is_subtest):
 			if expected_count and test_num <= expected_count:
 				# If parser reaches end of test before
 				# parsing expected number of subtests, print
@@ -697,20 +758,19 @@ def parse_test(lines: LineStream, expected_num: int, log: List[str]) -> Test:
 				test.log.extend(sub_log)
 				break
 		else:
-			sub_test = parse_test(lines, test_num, sub_log)
+			sub_test = parse_test(lines, test_num, sub_log, True)
 		subtests.append(sub_test)
 		test_num += 1
 	test.subtests = subtests
-	if not main:
+	if is_subtest:
 		# If not main test, look for test result line
 		test.log.extend(parse_diagnostic(lines))
-		if (parent_test and peek_test_name_match(lines, test)) or \
-				not parent_test:
-			parse_test_result(lines, test, expected_num)
-		else:
+		if test.name != "" and not peek_test_name_match(lines, test):
 			test.add_error('missing subtest result line!')
+		else:
+			parse_test_result(lines, test, expected_num)
 
-	# Check for there being no tests
+	# Check for there being no subtests within parent test
 	if parent_test and len(subtests) == 0:
 		# Don't override a bad status if this test had one reported.
 		# Assumption: no subtests means CRASHED is from Test.__init__()
@@ -720,11 +780,11 @@ def parse_test(lines: LineStream, expected_num: int, log: List[str]) -> Test:
 
 	# Add statuses to TestCounts attribute in Test object
 	bubble_up_test_results(test)
-	if parent_test and not main:
+	if parent_test and is_subtest:
 		# If test has subtests and is not the main test object, print
 		# footer.
 		print_test_footer(test)
-	elif not main:
+	elif is_subtest:
 		print_test_result(test)
 	return test
 
@@ -744,10 +804,10 @@ def parse_run_tests(kernel_output: Iterable[str]) -> Test:
 	test = Test()
 	if not lines:
 		test.name = '<missing>'
-		test.add_error('could not find any KTAP output!')
+		test.add_error('Could not find any KTAP output. Did any KUnit tests run?')
 		test.status = TestStatus.FAILURE_TO_PARSE_TESTS
 	else:
-		test = parse_test(lines, 0, [])
+		test = parse_test(lines, 0, [], False)
 		if test.status != TestStatus.NO_TESTS:
 			test.status = test.counts.get_status()
 	stdout.print_with_timestamp(DIVIDER)
diff --git a/tools/testing/kunit/kunit_tool_test.py b/tools/testing/kunit/kunit_tool_test.py
index e2cd2cc2e98f..0c2190514103 100755
--- a/tools/testing/kunit/kunit_tool_test.py
+++ b/tools/testing/kunit/kunit_tool_test.py
@@ -80,6 +80,13 @@ class KconfigTest(unittest.TestCase):
 		self.assertEqual(actual_kconfig, expected_kconfig)
 
 class KUnitParserTest(unittest.TestCase):
+	def setUp(self):
+		self.print_mock = mock.patch('kunit_printer.Printer.print').start()
+		self.addCleanup(mock.patch.stopall)
+
+	def noPrintCallContains(self, substr: str):
+		for call in self.print_mock.mock_calls:
+			self.assertNotIn(substr, call.args[0])
 
 	def assertContains(self, needle: str, haystack: kunit_parser.LineStream):
 		# Clone the iterator so we can print the contents on failure.
@@ -133,33 +140,29 @@ class KUnitParserTest(unittest.TestCase):
 		all_passed_log = test_data_path('test_is_test_passed-all_passed.log')
 		with open(all_passed_log) as file:
 			result = kunit_parser.parse_run_tests(file.readlines())
-		self.assertEqual(
-			kunit_parser.TestStatus.SUCCESS,
-			result.status)
+		self.assertEqual(kunit_parser.TestStatus.SUCCESS, result.status)
+		self.assertEqual(result.counts.errors, 0)
 
 	def test_parse_successful_nested_tests_log(self):
 		all_passed_log = test_data_path('test_is_test_passed-all_passed_nested.log')
 		with open(all_passed_log) as file:
 			result = kunit_parser.parse_run_tests(file.readlines())
-		self.assertEqual(
-			kunit_parser.TestStatus.SUCCESS,
-			result.status)
+		self.assertEqual(kunit_parser.TestStatus.SUCCESS, result.status)
+		self.assertEqual(result.counts.errors, 0)
 
 	def test_kselftest_nested(self):
 		kselftest_log = test_data_path('test_is_test_passed-kselftest.log')
 		with open(kselftest_log) as file:
 			result = kunit_parser.parse_run_tests(file.readlines())
-			self.assertEqual(
-				kunit_parser.TestStatus.SUCCESS,
-				result.status)
+		self.assertEqual(kunit_parser.TestStatus.SUCCESS, result.status)
+		self.assertEqual(result.counts.errors, 0)
 
 	def test_parse_failed_test_log(self):
 		failed_log = test_data_path('test_is_test_passed-failure.log')
 		with open(failed_log) as file:
 			result = kunit_parser.parse_run_tests(file.readlines())
-		self.assertEqual(
-			kunit_parser.TestStatus.FAILURE,
-			result.status)
+		self.assertEqual(kunit_parser.TestStatus.FAILURE, result.status)
+		self.assertEqual(result.counts.errors, 0)
 
 	def test_no_header(self):
 		empty_log = test_data_path('test_is_test_passed-no_tests_run_no_header.log')
@@ -167,9 +170,8 @@ class KUnitParserTest(unittest.TestCase):
 			result = kunit_parser.parse_run_tests(
 				kunit_parser.extract_tap_lines(file.readlines()))
 		self.assertEqual(0, len(result.subtests))
-		self.assertEqual(
-			kunit_parser.TestStatus.FAILURE_TO_PARSE_TESTS,
-			result.status)
+		self.assertEqual(kunit_parser.TestStatus.FAILURE_TO_PARSE_TESTS, result.status)
+		self.assertEqual(result.counts.errors, 1)
 
 	def test_missing_test_plan(self):
 		missing_plan_log = test_data_path('test_is_test_passed-'
@@ -179,12 +181,8 @@ class KUnitParserTest(unittest.TestCase):
 				kunit_parser.extract_tap_lines(
 				file.readlines()))
 		# A missing test plan is not an error.
-		self.assertEqual(0, result.counts.errors)
-		# All tests should be accounted for.
-		self.assertEqual(10, result.counts.total())
-		self.assertEqual(
-			kunit_parser.TestStatus.SUCCESS,
-			result.status)
+		self.assertEqual(result.counts, kunit_parser.TestCounts(passed=10, errors=0))
+		self.assertEqual(kunit_parser.TestStatus.SUCCESS, result.status)
 
 	def test_no_tests(self):
 		header_log = test_data_path('test_is_test_passed-no_tests_run_with_header.log')
@@ -192,9 +190,8 @@ class KUnitParserTest(unittest.TestCase):
 			result = kunit_parser.parse_run_tests(
 				kunit_parser.extract_tap_lines(file.readlines()))
 		self.assertEqual(0, len(result.subtests))
-		self.assertEqual(
-			kunit_parser.TestStatus.NO_TESTS,
-			result.status)
+		self.assertEqual(kunit_parser.TestStatus.NO_TESTS, result.status)
+		self.assertEqual(result.counts.errors, 1)
 
 	def test_no_tests_no_plan(self):
 		no_plan_log = test_data_path('test_is_test_passed-no_tests_no_plan.log')
@@ -205,7 +202,7 @@ class KUnitParserTest(unittest.TestCase):
 		self.assertEqual(
 			kunit_parser.TestStatus.NO_TESTS,
 			result.subtests[0].subtests[0].status)
-		self.assertEqual(1, result.counts.errors)
+		self.assertEqual(result.counts, kunit_parser.TestCounts(passed=1, errors=1))
 
 
 	def test_no_kunit_output(self):
@@ -214,9 +211,10 @@ class KUnitParserTest(unittest.TestCase):
 		with open(crash_log) as file:
 			result = kunit_parser.parse_run_tests(
 				kunit_parser.extract_tap_lines(file.readlines()))
-		print_mock.assert_any_call(StrContains('could not find any KTAP output!'))
+		print_mock.assert_any_call(StrContains('Could not find any KTAP output.'))
 		print_mock.stop()
 		self.assertEqual(0, len(result.subtests))
+		self.assertEqual(result.counts.errors, 1)
 
 	def test_skipped_test(self):
 		skipped_log = test_data_path('test_skip_tests.log')
@@ -224,18 +222,16 @@ class KUnitParserTest(unittest.TestCase):
 			result = kunit_parser.parse_run_tests(file.readlines())
 
 		# A skipped test does not fail the whole suite.
-		self.assertEqual(
-			kunit_parser.TestStatus.SUCCESS,
-			result.status)
+		self.assertEqual(kunit_parser.TestStatus.SUCCESS, result.status)
+		self.assertEqual(result.counts, kunit_parser.TestCounts(passed=4, skipped=1))
 
 	def test_skipped_all_tests(self):
 		skipped_log = test_data_path('test_skip_all_tests.log')
 		with open(skipped_log) as file:
 			result = kunit_parser.parse_run_tests(file.readlines())
 
-		self.assertEqual(
-			kunit_parser.TestStatus.SKIPPED,
-			result.status)
+		self.assertEqual(kunit_parser.TestStatus.SKIPPED, result.status)
+		self.assertEqual(result.counts, kunit_parser.TestCounts(skipped=5))
 
 	def test_ignores_hyphen(self):
 		hyphen_log = test_data_path('test_strip_hyphen.log')
@@ -243,71 +239,112 @@ class KUnitParserTest(unittest.TestCase):
 			result = kunit_parser.parse_run_tests(file.readlines())
 
 		# A skipped test does not fail the whole suite.
-		self.assertEqual(
-			kunit_parser.TestStatus.SUCCESS,
-			result.status)
+		self.assertEqual(kunit_parser.TestStatus.SUCCESS, result.status)
 		self.assertEqual(
 			"sysctl_test",
 			result.subtests[0].name)
 		self.assertEqual(
 			"example",
 			result.subtests[1].name)
-		file.close()
-
 
 	def test_ignores_prefix_printk_time(self):
 		prefix_log = test_data_path('test_config_printk_time.log')
 		with open(prefix_log) as file:
 			result = kunit_parser.parse_run_tests(file.readlines())
-			self.assertEqual(
-				kunit_parser.TestStatus.SUCCESS,
-				result.status)
-			self.assertEqual('kunit-resource-test', result.subtests[0].name)
+		self.assertEqual(kunit_parser.TestStatus.SUCCESS, result.status)
+		self.assertEqual('kunit-resource-test', result.subtests[0].name)
+		self.assertEqual(result.counts.errors, 0)
 
 	def test_ignores_multiple_prefixes(self):
 		prefix_log = test_data_path('test_multiple_prefixes.log')
 		with open(prefix_log) as file:
 			result = kunit_parser.parse_run_tests(file.readlines())
-			self.assertEqual(
-				kunit_parser.TestStatus.SUCCESS,
-				result.status)
-			self.assertEqual('kunit-resource-test', result.subtests[0].name)
+		self.assertEqual(kunit_parser.TestStatus.SUCCESS, result.status)
+		self.assertEqual('kunit-resource-test', result.subtests[0].name)
+		self.assertEqual(result.counts.errors, 0)
 
 	def test_prefix_mixed_kernel_output(self):
 		mixed_prefix_log = test_data_path('test_interrupted_tap_output.log')
 		with open(mixed_prefix_log) as file:
 			result = kunit_parser.parse_run_tests(file.readlines())
-			self.assertEqual(
-				kunit_parser.TestStatus.SUCCESS,
-				result.status)
-			self.assertEqual('kunit-resource-test', result.subtests[0].name)
+		self.assertEqual(kunit_parser.TestStatus.SUCCESS, result.status)
+		self.assertEqual('kunit-resource-test', result.subtests[0].name)
+		self.assertEqual(result.counts.errors, 0)
 
 	def test_prefix_poundsign(self):
 		pound_log = test_data_path('test_pound_sign.log')
 		with open(pound_log) as file:
 			result = kunit_parser.parse_run_tests(file.readlines())
-			self.assertEqual(
-				kunit_parser.TestStatus.SUCCESS,
-				result.status)
-			self.assertEqual('kunit-resource-test', result.subtests[0].name)
+		self.assertEqual(kunit_parser.TestStatus.SUCCESS, result.status)
+		self.assertEqual('kunit-resource-test', result.subtests[0].name)
+		self.assertEqual(result.counts.errors, 0)
 
 	def test_kernel_panic_end(self):
 		panic_log = test_data_path('test_kernel_panic_interrupt.log')
 		with open(panic_log) as file:
 			result = kunit_parser.parse_run_tests(file.readlines())
-			self.assertEqual(
-				kunit_parser.TestStatus.TEST_CRASHED,
-				result.status)
-			self.assertEqual('kunit-resource-test', result.subtests[0].name)
+		self.assertEqual(kunit_parser.TestStatus.TEST_CRASHED, result.status)
+		self.assertEqual('kunit-resource-test', result.subtests[0].name)
+		self.assertGreaterEqual(result.counts.errors, 1)
 
 	def test_pound_no_prefix(self):
 		pound_log = test_data_path('test_pound_no_prefix.log')
 		with open(pound_log) as file:
 			result = kunit_parser.parse_run_tests(file.readlines())
-			self.assertEqual(
-				kunit_parser.TestStatus.SUCCESS,
-				result.status)
-			self.assertEqual('kunit-resource-test', result.subtests[0].name)
+		self.assertEqual(kunit_parser.TestStatus.SUCCESS, result.status)
+		self.assertEqual('kunit-resource-test', result.subtests[0].name)
+		self.assertEqual(result.counts.errors, 0)
+
+	def test_summarize_failures(self):
+		output = """
+		KTAP version 1
+		1..2
+			# Subtest: all_failed_suite
+			1..2
+			not ok 1 - test1
+			not ok 2 - test2
+		not ok 1 - all_failed_suite
+			# Subtest: some_failed_suite
+			1..2
+			ok 1 - test1
+			not ok 2 - test2
+		not ok 1 - some_failed_suite
+		"""
+		result = kunit_parser.parse_run_tests(output.splitlines())
+		self.assertEqual(kunit_parser.TestStatus.FAILURE, result.status)
+
+		self.assertEqual(kunit_parser._summarize_failed_tests(result),
+			'Failures: all_failed_suite, some_failed_suite.test2')
+
+	def test_ktap_format(self):
+		ktap_log = test_data_path('test_parse_ktap_output.log')
+		with open(ktap_log) as file:
+			result = kunit_parser.parse_run_tests(file.readlines())
+		self.assertEqual(result.counts, kunit_parser.TestCounts(passed=3))
+		self.assertEqual('suite', result.subtests[0].name)
+		self.assertEqual('case_1', result.subtests[0].subtests[0].name)
+		self.assertEqual('case_2', result.subtests[0].subtests[1].name)
+
+	def test_parse_subtest_header(self):
+		ktap_log = test_data_path('test_parse_subtest_header.log')
+		with open(ktap_log) as file:
+			result = kunit_parser.parse_run_tests(file.readlines())
+		self.print_mock.assert_any_call(StrContains('suite (1 subtest)'))
+
+	def test_show_test_output_on_failure(self):
+		output = """
+		KTAP version 1
+		1..1
+		  Test output.
+		    Indented more.
+		not ok 1 test1
+		"""
+		result = kunit_parser.parse_run_tests(output.splitlines())
+		self.assertEqual(kunit_parser.TestStatus.FAILURE, result.status)
+
+		self.print_mock.assert_any_call(StrContains('Test output.'))
+		self.print_mock.assert_any_call(StrContains('  Indented more.'))
+		self.noPrintCallContains('not ok 1 test1')
 
 def line_stream_from_strs(strs: Iterable[str]) -> kunit_parser.LineStream:
 	return kunit_parser.LineStream(enumerate(strs, start=1))
@@ -485,6 +522,9 @@ class LinuxSourceTreeTest(unittest.TestCase):
 
 
 class KUnitJsonTest(unittest.TestCase):
+	def setUp(self):
+		self.print_mock = mock.patch('kunit_printer.Printer.print').start()
+		self.addCleanup(mock.patch.stopall)
 
 	def _json_for(self, log_file):
 		with open(test_data_path(log_file)) as file:
@@ -581,7 +621,7 @@ class KUnitMainTest(unittest.TestCase):
 		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)
-		self.print_mock.assert_any_call(StrContains('could not find any KTAP output!'))
+		self.print_mock.assert_any_call(StrContains('Could not find any KTAP output.'))
 
 	def test_exec_no_tests(self):
 		self.linux_source_mock.run_kernel = mock.Mock(return_value=['TAP version 14', '1..0'])
diff --git a/tools/testing/kunit/test_data/test_parse_ktap_output.log b/tools/testing/kunit/test_data/test_parse_ktap_output.log
new file mode 100644
index 000000000000..ccdf244e5303
--- /dev/null
+++ b/tools/testing/kunit/test_data/test_parse_ktap_output.log
@@ -0,0 +1,8 @@
+KTAP version 1
+1..1
+  KTAP version 1
+  1..3
+  ok 1 case_1
+  ok 2 case_2
+  ok 3 case_3
+ok 1 suite
diff --git a/tools/testing/kunit/test_data/test_parse_subtest_header.log b/tools/testing/kunit/test_data/test_parse_subtest_header.log
new file mode 100644
index 000000000000..216631092e7b
--- /dev/null
+++ b/tools/testing/kunit/test_data/test_parse_subtest_header.log
@@ -0,0 +1,7 @@
+KTAP version 1
+1..1
+  KTAP version 1
+  # Subtest: suite
+  1..1
+  ok 1 test
+ok 1 suite
\ No newline at end of file