qt5base-lts/tests/auto/testlib/selftests/generate_expected_output.py
Edward Welbourne 4cb46e27fd generate_expected_output.py: more refinements to filtering of noise
Two more ways line numbers were making it through.
Corrected a doc-string to tell nearer to the truth.

Change-Id: I946aaeb936d47fffe50d7ec15e2524992cc9e428
Reviewed-by: Frederik Gladhorn <frederik.gladhorn@qt.io>
2017-06-13 11:27:38 +00:00

277 lines
12 KiB
Python
Executable File

#!/usr/bin/env python3
#############################################################################
##
## Copyright (C) 2016 The Qt Company Ltd.
## Contact: https://www.qt.io/licensing/
##
## This file is part of the release tools of the Qt Toolkit.
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## $QT_BEGIN_LICENSE:GPL-EXCEPT$
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## GNU General Public License Usage
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## $QT_END_LICENSE$
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#############################################################################
# Regenerate all tests' output.
#
# Usage: cd to the build directory corresponding to this script's
# location; invoke this script; optionally pass the names of sub-dirs
# to limit which tests to regenerate expected_* files for.
#
# The saved test output is used by ./tst_selftests.cpp, which compares
# it to the output of each test, ignoring various boring changes.
# This script canonicalises the parts that would exhibit those boring
# changes, so as to avoid noise in git (and conflicts in merges) for
# the saved copies of the output. If you add or remove any files, be
# sure to update selftests.qrc to match; the selftest only sees files
# listed there.
import os
import subprocess
import re
class Fail (Exception): pass
class Cleaner (object):
"""Tool to clean up test output to make diff-ing runs useful.
We care about whether tests pass or fail - if that changes,
something that matters has happened - and we care about some
changes to what they say when they do fail; but we don't care
exactly what line of what file the failing line of code now
occupies, nor do we care how many milliseconds each test took to
run; and changes to the Qt version number mean nothing to us.
Create one singleton instance; it'll do mildly expensive things
once and you can use its .clean() method to tidy up your test
output."""
def __init__(self, here, command):
"""Set up the details we need for later cleaning.
Takes two parameters: here is os.getcwd() and command is how
this script was invoked, from which we'll work out where it
is; in a shadow build, the former is the build tree's location
corresponding to this last. Saves the directory of this
script as self.sourceDir, so client can find tst_selftests.cpp
there. Checks here does look as expected in a build tree -
raising Fail() if not - then invokes qmake to discover Qt
version (saved as .version for the benefit of clients) and
prepares the sequence of (regex, replace) pairs that .clean()
needs to do its job."""
self.version, self.sourceDir, self.__replace = self.__getPatterns(here, command)
@staticmethod
def __getPatterns(here, command,
patterns = (
# Timings:
(r'( *<Duration msecs=)"[\d\.]+"/>', r'\1"0"/>'), # xml, lightxml
(r'(Totals:.*,) *[0-9.]+ms', r'\1 0ms'), # txt
# Benchmarks:
(r'[0-9,.]+( (?:CPU ticks|msecs) per iteration \(total:) [0-9,.]+ ', r'0\1 0, '), # txt
(r'(<BenchmarkResult metric="(?:CPUTicks|WalltimeMilliseconds)".*\bvalue=)"[^"]+"', r'\1"0"'), # xml, lightxml
# Build details:
(r'(Config: Using QtTest library).*', r'\1'), # txt
(r'( *<QtBuild)>[^<]+</QtBuild>', r'\1/>'), # xml, lightxml
(r'(<property value=")[^"]+(" name="QtBuild"/>)', r'\1\2'), # xunitxml
# Line numbers in source files:
(r'(ASSERT: ".*" in file .*, line) \d+', r'\1 0'), # lightxml
(r'(Loc: \[[^[\]()]+)\(\d+\)', r'\1(0)'), # txt
(r'(\[Loc: [^[\]()]+)\(\d+\)', r'\1(0)'), # teamcity
(r'(<(?:Incident|Message)\b.*\bfile=.*\bline=)"\d+"', r'\1"0"'), # lightxml, xml
),
precook = re.compile):
"""Private implementation details of __init__()."""
qmake = ('..',) * 4 + ('bin', 'qmake')
qmake = os.path.join(*qmake)
if os.path.sep in command:
scriptPath = os.path.abspath(command)
elif os.path.exists(command):
# e.g. if you typed "python3 generate_expected_output.py"
scriptPath = os.path.join(here, command)
else:
# From py 3.2: could use os.get_exec_path() here.
for d in os.environ.get('PATH', '').split(os.pathsep):
scriptPath = os.path.join(d, command)
if os.path.isfile(scriptPath):
break
else: # didn't break
raise Fail('Unable to find', command, 'in $PATH')
# Are we being run from the right place ?
myNames = scriptPath.split(os.path.sep)
if not (here.split(os.path.sep)[-5:] == myNames[-6:-1]
and os.path.isfile(qmake)):
raise Fail('Run', myNames[-1], 'in its directory of a completed build')
try:
qtver = subprocess.check_output([qmake, '-query', 'QT_VERSION'])
except OSError as what:
raise Fail(what.strerror)
qtver = qtver.strip().decode('utf-8')
scriptPath = os.path.dirname(scriptPath) # ditch leaf file-name
sentinel = os.path.sep + 'qtbase' + os.path.sep # '/qtbase/'
# Identify the path prefix of our qtbase ancestor directory
# (source, build and $PWD, when different); trim such prefixes
# off all paths we see.
roots = tuple(r[:r.find(sentinel) + 1].encode('unicode-escape').decode('utf-8')
for r in set((here, scriptPath, os.environ.get('PWD', '')))
if sentinel in r)
patterns += tuple((root, r'') for root in roots) + (
(r'\.'.join(qtver.split('.')), r'@INSERT_QT_VERSION_HERE@'),)
if any('-' in r for r in roots):
# Our xml formats replace hyphens with a character entity:
patterns += tuple((root.replace('-', '&#x0*2D;'), r'')
for root in roots if '-' in root)
return qtver, scriptPath, tuple((precook(p), r) for p, r in patterns)
def clean(self, data):
"""Remove volatile details from test output.
Takes the full test output as a single (possibly huge)
multi-line string; iterates over cleaned lines of output."""
for line in data.split('\n'):
# Replace all occurrences of each regex:
for searchRe, replaceExp in self.__replace:
line = searchRe.sub(replaceExp, line)
yield line
class Scanner (object):
"""Knows which subdirectories to generate output for.
Tell its constructor the name of this source directory (see
Cleaner's .sourceDir) and it'll scan tst_selftests.cpp for the
list. Its .subdirs() can then filter a user-supplied list of
subdirs or generate the full list, when the user supplied
none."""
def __init__(self, srcDir):
self.__tested = tuple(self.__scan_cpp(os.path.join(srcDir, 'tst_selftests.cpp')))
@staticmethod
def __scan_cpp(name,
trimc = re.compile(r'/\*.*?\*/').sub,
trimcpp = re.compile(r'//.*$').sub,
first = re.compile(r'(QStringList|auto)\s+tests\s*=\s*QStringList\(\)').match,
match = re.compile(r'(?:tests\s*)?<<\s*"(\w+)"').match,
last = re.compile(r'\bfor.*\b(LoggerSet|auto)\b.*\ballLoggerSets\(\)').search):
"""Scans tst_selftests.cpp to find which subdirs matter.
There's a list, tests, to which all subdir names get added, if
they're to be tested. Other sub-dirs aren't tested, so
there's no sense in generating output for them."""
scan = False
with open(name) as src:
for line in src:
line = trimcpp('', trimc('', line.strip())).strip()
if not scan:
got = first(line)
if got:
scan, line = True, line[len(got.group()):]
if scan:
if last(line): break
got = match(line)
while got:
yield got.group(1)
line = line[len(got.group()):].strip()
got = match(line)
def subdirs(self, given):
if given:
for d in given:
if not os.path.isdir(d):
print('No such directory:', d, '- skipped')
elif d in self.__tested:
yield d
else:
print('Directory', d, 'is not tested by tst_selftests.cpp')
else:
for d in self.__tested:
if os.path.isdir(d):
yield d
else:
print('tst_selftests.cpp names', d, "as a test, but it doesn't exist")
del re
def generateTestData(testname, clean,
formats = ('xml', 'txt', 'xunitxml', 'lightxml', 'teamcity'),
extraArgs = {
"commandlinedata": "fiveTablePasses fiveTablePasses:fiveTablePasses_data1 -v2",
"benchlibcallgrind": "-callgrind",
"benchlibeventcounter": "-eventcounter",
"benchliboptions": "-eventcounter",
"benchlibtickcounter": "-tickcounter",
"badxml": "-eventcounter",
"benchlibcounting": "-eventcounter",
"printdatatags": "-datatags",
"printdatatagswithglobaltags": "-datatags",
"silent": "-silent",
"verbose1": "-v1",
"verbose2": "-v2",
}):
"""Run one test and save its cleaned results.
Required arguments are the name of the test directory (the binary
it contains is expected to have the same name) and a function
that'll clean a test-run's output; see Cleaner.clean().
"""
# MS-Win: shall need to add .exe to this
path = os.path.join(testname, testname)
if not os.path.isfile(path):
print("Warning: directory", testname, "contains no test executable")
return
print(" running", testname)
for format in formats:
cmd = [path, '-' + format]
if testname in extraArgs:
cmd += extraArgs[testname].split()
data = subprocess.Popen(cmd, stdout=subprocess.PIPE,
universal_newlines=True).communicate()[0]
with open('expected_' + testname + '.' + format, 'w') as out:
out.write('\n'.join(clean(data))) # write() appends a newline, too
def main(name, *args):
"""Minimal argument parsing and driver for the real work"""
os.environ['LC_ALL'] = 'C'
herePath = os.getcwd()
cleaner = Cleaner(herePath, name)
tests = tuple(Scanner(cleaner.sourceDir).subdirs(args))
print("Generating", len(tests), "test results for", cleaner.version, "in:", herePath)
for path in tests:
generateTestData(path, cleaner.clean)
if __name__ == '__main__':
# Executed when script is run, not when imported (e.g. to debug)
import sys
if sys.platform.startswith('win'):
print("This script does not work on Windows.")
exit()
try:
main(*sys.argv)
except Fail as what:
sys.stderr.write('Failed: ' + ' '.join(what.args) + '\n')
exit(1)