summaryrefslogtreecommitdiff
path: root/tools/testing/kunit/kunit_parser.py
blob: b88db3f51dc5d8a1271b4525aaaefac98e20b371 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
# SPDX-License-Identifier: GPL-2.0
#
# Parses test results from a kernel dmesg log.
#
# Copyright (C) 2019, Google LLC.
# Author: Felix Guo <felixguoxiuping@gmail.com>
# Author: Brendan Higgins <brendanhiggins@google.com>

import re

from collections import namedtuple
from datetime import datetime
from enum import Enum, auto
from functools import reduce
from typing import Iterable, Iterator, List, Optional, Tuple

TestResult = namedtuple('TestResult', ['status','suites','log'])

class TestSuite(object):
	def __init__(self) -> None:
		self.status = TestStatus.SUCCESS
		self.name = ''
		self.cases = []  # type: List[TestCase]

	def __str__(self) -> str:
		return 'TestSuite(' + str(self.status) + ',' + self.name + ',' + str(self.cases) + ')'

	def __repr__(self) -> str:
		return str(self)

class TestCase(object):
	def __init__(self) -> None:
		self.status = TestStatus.SUCCESS
		self.name = ''
		self.log = []  # type: List[str]

	def __str__(self) -> str:
		return 'TestCase(' + str(self.status) + ',' + self.name + ',' + str(self.log) + ')'

	def __repr__(self) -> str:
		return str(self)

class TestStatus(Enum):
	SUCCESS = auto()
	FAILURE = auto()
	SKIPPED = auto()
	TEST_CRASHED = auto()
	NO_TESTS = auto()
	FAILURE_TO_PARSE_TESTS = auto()

class LineStream:
	"""Provides a peek()/pop() interface over an iterator of (line#, text)."""
	_lines: Iterator[Tuple[int, str]]
	_next: Tuple[int, str]
	_done: bool

	def __init__(self, lines: Iterator[Tuple[int, str]]):
		self._lines = lines
		self._done = False
		self._next = (0, '')
		self._get_next()

	def _get_next(self) -> None:
		try:
			self._next = next(self._lines)
		except StopIteration:
			self._done = True

	def peek(self) -> str:
		return self._next[1]

	def pop(self) -> str:
		n = self._next
		self._get_next()
		return n[1]

	def __bool__(self) -> bool:
		return not self._done

	# Only used by kunit_tool_test.py.
	def __iter__(self) -> Iterator[str]:
		while bool(self):
			yield self.pop()

	def line_number(self) -> int:
		return self._next[0]

kunit_start_re = re.compile(r'TAP version [0-9]+$')
kunit_end_re = re.compile('(List of all partitions:|'
			  'Kernel panic - not syncing: VFS:|reboot: System halted)')

def extract_tap_lines(kernel_output: Iterable[str]) -> LineStream:
	def isolate_kunit_output(kernel_output: Iterable[str]) -> Iterator[Tuple[int, str]]:
		line_num = 0
		started = False
		for line in kernel_output:
			line_num += 1
			line = line.rstrip()  # line always has a trailing \n
			if kunit_start_re.search(line):
				prefix_len = len(line.split('TAP version')[0])
				started = True
				yield line_num, line[prefix_len:]
			elif kunit_end_re.search(line):
				break
			elif started:
				yield line_num, line[prefix_len:]
	return LineStream(lines=isolate_kunit_output(kernel_output))

def raw_output(kernel_output) -> None:
	for line in kernel_output:
		print(line.rstrip())

DIVIDER = '=' * 60

RESET = '\033[0;0m'

def red(text) -> str:
	return '\033[1;31m' + text + RESET

def yellow(text) -> str:
	return '\033[1;33m' + text + RESET

def green(text) -> str:
	return '\033[1;32m' + text + RESET

def print_with_timestamp(message) -> None:
	print('[%s] %s' % (datetime.now().strftime('%H:%M:%S'), message))

def format_suite_divider(message) -> str:
	return '======== ' + message + ' ========'

def print_suite_divider(message) -> None:
	print_with_timestamp(DIVIDER)
	print_with_timestamp(format_suite_divider(message))

def print_log(log) -> None:
	for m in log:
		print_with_timestamp(m)

TAP_ENTRIES = re.compile(r'^(TAP|[\s]*ok|[\s]*not ok|[\s]*[0-9]+\.\.[0-9]+|[\s]*#).*$')

def consume_non_diagnostic(lines: LineStream) -> None:
	while lines and not TAP_ENTRIES.match(lines.peek()):
		lines.pop()

def save_non_diagnostic(lines: LineStream, test_case: TestCase) -> None:
	while lines and not TAP_ENTRIES.match(lines.peek()):
		test_case.log.append(lines.peek())
		lines.pop()

OkNotOkResult = namedtuple('OkNotOkResult', ['is_ok','description', 'text'])

OK_NOT_OK_SKIP = re.compile(r'^[\s]*(ok|not ok) [0-9]+ - (.*) # SKIP(.*)$')

OK_NOT_OK_SUBTEST = re.compile(r'^[\s]+(ok|not ok) [0-9]+ - (.*)$')

OK_NOT_OK_MODULE = re.compile(r'^(ok|not ok) ([0-9]+) - (.*)$')

def parse_ok_not_ok_test_case(lines: LineStream, test_case: TestCase) -> bool:
	save_non_diagnostic(lines, test_case)
	if not lines:
		test_case.status = TestStatus.TEST_CRASHED
		return True
	line = lines.peek()
	match = OK_NOT_OK_SUBTEST.match(line)
	while not match and lines:
		line = lines.pop()
		match = OK_NOT_OK_SUBTEST.match(line)
	if match:
		test_case.log.append(lines.pop())
		test_case.name = match.group(2)
		skip_match = OK_NOT_OK_SKIP.match(line)
		if skip_match:
			test_case.status = TestStatus.SKIPPED
			return True
		if test_case.status == TestStatus.TEST_CRASHED:
			return True
		if match.group(1) == 'ok':
			test_case.status = TestStatus.SUCCESS
		else:
			test_case.status = TestStatus.FAILURE
		return True
	else:
		return False

SUBTEST_DIAGNOSTIC = re.compile(r'^[\s]+# (.*)$')
DIAGNOSTIC_CRASH_MESSAGE = re.compile(r'^[\s]+# .*?: kunit test case crashed!$')

def parse_diagnostic(lines: LineStream, test_case: TestCase) -> bool:
	save_non_diagnostic(lines, test_case)
	if not lines:
		return False
	line = lines.peek()
	match = SUBTEST_DIAGNOSTIC.match(line)
	if match:
		test_case.log.append(lines.pop())
		crash_match = DIAGNOSTIC_CRASH_MESSAGE.match(line)
		if crash_match:
			test_case.status = TestStatus.TEST_CRASHED
		return True
	else:
		return False

def parse_test_case(lines: LineStream) -> Optional[TestCase]:
	test_case = TestCase()
	save_non_diagnostic(lines, test_case)
	while parse_diagnostic(lines, test_case):
		pass
	if parse_ok_not_ok_test_case(lines, test_case):
		return test_case
	else:
		return None

SUBTEST_HEADER = re.compile(r'^[\s]+# Subtest: (.*)$')

def parse_subtest_header(lines: LineStream) -> Optional[str]:
	consume_non_diagnostic(lines)
	if not lines:
		return None
	match = SUBTEST_HEADER.match(lines.peek())
	if match:
		lines.pop()
		return match.group(1)
	else:
		return None

SUBTEST_PLAN = re.compile(r'[\s]+[0-9]+\.\.([0-9]+)')

def parse_subtest_plan(lines: LineStream) -> Optional[int]:
	consume_non_diagnostic(lines)
	match = SUBTEST_PLAN.match(lines.peek())
	if match:
		lines.pop()
		return int(match.group(1))
	else:
		return None

def max_status(left: TestStatus, right: TestStatus) -> TestStatus:
	if left == right:
		return left
	elif left == TestStatus.TEST_CRASHED or right == TestStatus.TEST_CRASHED:
		return TestStatus.TEST_CRASHED
	elif left == TestStatus.FAILURE or right == TestStatus.FAILURE:
		return TestStatus.FAILURE
	elif left == TestStatus.SKIPPED:
		return right
	else:
		return left

def parse_ok_not_ok_test_suite(lines: LineStream,
			       test_suite: TestSuite,
			       expected_suite_index: int) -> bool:
	consume_non_diagnostic(lines)
	if not lines:
		test_suite.status = TestStatus.TEST_CRASHED
		return False
	line = lines.peek()
	match = OK_NOT_OK_MODULE.match(line)
	if match:
		lines.pop()
		if match.group(1) == 'ok':
			test_suite.status = TestStatus.SUCCESS
		else:
			test_suite.status = TestStatus.FAILURE
		skip_match = OK_NOT_OK_SKIP.match(line)
		if skip_match:
			test_suite.status = TestStatus.SKIPPED
		suite_index = int(match.group(2))
		if suite_index != expected_suite_index:
			print_with_timestamp(
				red('[ERROR] ') + 'expected_suite_index ' +
				str(expected_suite_index) + ', but got ' +
				str(suite_index))
		return True
	else:
		return False

def bubble_up_errors(status_list: Iterable[TestStatus]) -> TestStatus:
	return reduce(max_status, status_list, TestStatus.SKIPPED)

def bubble_up_test_case_errors(test_suite: TestSuite) -> TestStatus:
	max_test_case_status = bubble_up_errors(x.status for x in test_suite.cases)
	return max_status(max_test_case_status, test_suite.status)

def parse_test_suite(lines: LineStream, expected_suite_index: int) -> Optional[TestSuite]:
	if not lines:
		return None
	consume_non_diagnostic(lines)
	test_suite = TestSuite()
	test_suite.status = TestStatus.SUCCESS
	name = parse_subtest_header(lines)
	if not name:
		return None
	test_suite.name = name
	expected_test_case_num = parse_subtest_plan(lines)
	if expected_test_case_num is None:
		return None
	while expected_test_case_num > 0:
		test_case = parse_test_case(lines)
		if not test_case:
			break
		test_suite.cases.append(test_case)
		expected_test_case_num -= 1
	if parse_ok_not_ok_test_suite(lines, test_suite, expected_suite_index):
		test_suite.status = bubble_up_test_case_errors(test_suite)
		return test_suite
	elif not lines:
		print_with_timestamp(red('[ERROR] ') + 'ran out of lines before end token')
		return test_suite
	else:
		print(f'failed to parse end of suite "{name}", at line {lines.line_number()}: {lines.peek()}')
		return None

TAP_HEADER = re.compile(r'^TAP version 14$')

def parse_tap_header(lines: LineStream) -> bool:
	consume_non_diagnostic(lines)
	if TAP_HEADER.match(lines.peek()):
		lines.pop()
		return True
	else:
		return False

TEST_PLAN = re.compile(r'[0-9]+\.\.([0-9]+)')

def parse_test_plan(lines: LineStream) -> Optional[int]:
	consume_non_diagnostic(lines)
	match = TEST_PLAN.match(lines.peek())
	if match:
		lines.pop()
		return int(match.group(1))
	else:
		return None

def bubble_up_suite_errors(test_suites: Iterable[TestSuite]) -> TestStatus:
	return bubble_up_errors(x.status for x in test_suites)

def parse_test_result(lines: LineStream) -> TestResult:
	consume_non_diagnostic(lines)
	if not lines or not parse_tap_header(lines):
		return TestResult(TestStatus.FAILURE_TO_PARSE_TESTS, [], lines)
	expected_test_suite_num = parse_test_plan(lines)
	if expected_test_suite_num == 0:
		return TestResult(TestStatus.NO_TESTS, [], lines)
	elif expected_test_suite_num is None:
		return TestResult(TestStatus.FAILURE_TO_PARSE_TESTS, [], lines)
	test_suites = []
	for i in range(1, expected_test_suite_num + 1):
		test_suite = parse_test_suite(lines, i)
		if test_suite:
			test_suites.append(test_suite)
		else:
			print_with_timestamp(
				red('[ERROR] ') + ' expected ' +
				str(expected_test_suite_num) +
				' test suites, but got ' + str(i - 2))
			break
	test_suite = parse_test_suite(lines, -1)
	if test_suite:
		print_with_timestamp(red('[ERROR] ') +
			'got unexpected test suite: ' + test_suite.name)
	if test_suites:
		return TestResult(bubble_up_suite_errors(test_suites), test_suites, lines)
	else:
		return TestResult(TestStatus.NO_TESTS, [], lines)

class TestCounts:
	passed: int
	failed: int
	crashed: int
	skipped: int

	def __init__(self):
		self.passed = 0
		self.failed = 0
		self.crashed = 0
		self.skipped = 0

	def total(self) -> int:
		return self.passed + self.failed + self.crashed + self.skipped

def print_and_count_results(test_result: TestResult) -> TestCounts:
	counts = TestCounts()
	for test_suite in test_result.suites:
		if test_suite.status == TestStatus.SUCCESS:
			print_suite_divider(green('[PASSED] ') + test_suite.name)
		elif test_suite.status == TestStatus.SKIPPED:
			print_suite_divider(yellow('[SKIPPED] ') + test_suite.name)
		elif test_suite.status == TestStatus.TEST_CRASHED:
			print_suite_divider(red('[CRASHED] ' + test_suite.name))
		else:
			print_suite_divider(red('[FAILED] ') + test_suite.name)
		for test_case in test_suite.cases:
			if test_case.status == TestStatus.SUCCESS:
				counts.passed += 1
				print_with_timestamp(green('[PASSED] ') + test_case.name)
			elif test_case.status == TestStatus.SKIPPED:
				counts.skipped += 1
				print_with_timestamp(yellow('[SKIPPED] ') + test_case.name)
			elif test_case.status == TestStatus.TEST_CRASHED:
				counts.crashed += 1
				print_with_timestamp(red('[CRASHED] ' + test_case.name))
				print_log(map(yellow, test_case.log))
				print_with_timestamp('')
			else:
				counts.failed += 1
				print_with_timestamp(red('[FAILED] ') + test_case.name)
				print_log(map(yellow, test_case.log))
				print_with_timestamp('')
	return counts

def parse_run_tests(kernel_output: Iterable[str]) -> TestResult:
	counts = TestCounts()
	lines = extract_tap_lines(kernel_output)
	test_result = parse_test_result(lines)
	if test_result.status == TestStatus.NO_TESTS:
		print(red('[ERROR] ') + yellow('no tests run!'))
	elif test_result.status == TestStatus.FAILURE_TO_PARSE_TESTS:
		print(red('[ERROR] ') + yellow('could not parse test results!'))
	else:
		counts = print_and_count_results(test_result)
	print_with_timestamp(DIVIDER)
	if test_result.status == TestStatus.SUCCESS:
		fmt = green
	elif test_result.status == TestStatus.SKIPPED:
		fmt = yellow
	else:
		fmt =red
	print_with_timestamp(
		fmt('Testing complete. %d tests run. %d failed. %d crashed. %d skipped.' %
		    (counts.total(), counts.failed, counts.crashed, counts.skipped)))
	return test_result