blob: 19f8172249fd760f96e8affc50601c940762020a [file] [log] [blame]
#!/usr/bin/env python3
# -*- coding: utf-8 -*-
# Copyright 2019 The Chromium OS Authors. All rights reserved.
# Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE file.
"""Runs tests for the given input files.
Tries its best to autodetect all tests based on path name without being *too*
In short, there's a small set of directories in which, if you make any change,
all of the tests in those directories get run. Additionally, if you change a
python file named foo, it'll run or if either of
those exist.
All tests are run in parallel.
# NOTE: An alternative mentioned on the initial CL for this
# is pytest. It looks like that brings some complexity (and makes use outside
# of the chroot a bit more obnoxious?), but might be worth exploring if this
# starts to grow quite complex on its own.
from __future__ import print_function
import argparse
import collections
import contextlib
import multiprocessing.pool
import os
import pipes
import subprocess
import sys
TestSpec = collections.namedtuple('TestSpec', ['directory', 'command'])
# List of python scripts that are not test with relative path to
# toolchain-utils.
non_test_py_files = {
def _make_relative_to_toolchain_utils(toolchain_utils, path):
"""Cleans & makes a path relative to toolchain_utils.
Raises if that path isn't under toolchain_utils.
# abspath has the nice property that it removes any markers like './'.
as_abs = os.path.abspath(path)
result = os.path.relpath(as_abs, start=toolchain_utils)
if result.startswith('../'):
raise ValueError('Non toolchain-utils directory found: %s' % result)
return result
def _filter_python_tests(test_files, toolchain_utils):
"""Returns all files that are real python tests."""
python_tests = []
for test_file in test_files:
rel_path = _make_relative_to_toolchain_utils(toolchain_utils, test_file)
if rel_path not in non_test_py_files:
print('## %s ... NON_TEST_PY_FILE' % rel_path)
return python_tests
def _gather_python_tests_in(rel_subdir, toolchain_utils):
"""Returns all files that appear to be Python tests in a given directory."""
subdir = os.path.join(toolchain_utils, rel_subdir)
test_files = (
os.path.join(subdir, file_name)
for file_name in os.listdir(subdir)
if file_name.endswith('') or file_name.endswith(''))
return _filter_python_tests(test_files, toolchain_utils)
def _run_test(test_spec):
"""Runs a test."""
p = subprocess.Popen(
stdout, _ = p.communicate()
exit_code = p.wait()
return exit_code, stdout
def _python_test_to_spec(test_file):
"""Given a .py file, convert it to a TestSpec."""
# Run tests in the directory they exist in, since some of them are sensitive
# to that.
test_directory = os.path.dirname(os.path.abspath(test_file))
file_name = os.path.basename(test_file)
if os.access(test_file, os.X_OK):
command = ['./' + file_name]
# Assume the user wanted py3.
command = ['python3', file_name]
return TestSpec(directory=test_directory, command=command)
def _autodetect_python_tests_for(test_file, toolchain_utils):
"""Given a test file, detect if there may be related tests."""
if not test_file.endswith('.py'):
return []
test_suffixes = ['', '']
if any(test_file.endswith(x) for x in test_suffixes):
test_files = [test_file]
base = test_file[:-3]
candidates = (base + x for x in test_suffixes)
test_files = (x for x in candidates if os.path.exists(x))
return _filter_python_tests(test_files, toolchain_utils)
def _run_test_scripts(all_tests, show_successful_output=False):
"""Runs a list of TestSpecs. Returns whether all of them succeeded."""
with contextlib.closing(multiprocessing.pool.ThreadPool()) as pool:
results = [pool.apply_async(_run_test, (test,)) for test in all_tests]
failures = []
for i, (test, future) in enumerate(zip(all_tests, results)):
# Add a bit more spacing between outputs.
if show_successful_output and i:
pretty_test = ' '.join(pipes.quote(test_arg) for test_arg in test.command)
pretty_directory = os.path.relpath(
if pretty_directory == '.':
test_message = pretty_test
test_message = '%s in %s/' % (pretty_test, pretty_directory)
print('## %s ... ' % test_message, end='')
# Be sure that the users sees which test is running.
exit_code, stdout = future.get()
if not exit_code:
if show_successful_output or exit_code:
if failures:
word = 'tests' if len(failures) > 1 else 'test'
print('%d %s failed: %s' % (len(failures), word, failures))
return not failures
def _compress_list(l):
"""Removes consecutive duplicate elements from |l|.
>>> _compress_list([])
>>> _compress_list([1, 1])
>>> _compress_list([1, 2, 1])
[1, 2, 1]
result = []
for e in l:
if result and result[-1] == e:
return result
def _fix_python_path(toolchain_utils):
pypath = os.environ.get('PYTHONPATH', '')
if pypath:
pypath = ':' + pypath
os.environ['PYTHONPATH'] = toolchain_utils + pypath
def _find_forced_subdir_python_tests(test_paths, toolchain_utils):
assert all(os.path.isabs(path) for path in test_paths)
# Directories under toolchain_utils for which any change will cause all tests
# in that directory to be rerun. Includes changes in subdirectories.
all_dirs = {
relative_paths = [
_make_relative_to_toolchain_utils(toolchain_utils, path)
for path in test_paths
gather_test_dirs = set()
for path in relative_paths:
top_level_dir = path.split('/')[0]
if top_level_dir in all_dirs:
results = []
for d in sorted(gather_test_dirs):
results += _gather_python_tests_in(d, toolchain_utils)
return results
def _find_go_tests(test_paths):
"""Returns TestSpecs for the go folders of the given files"""
assert all(os.path.isabs(path) for path in test_paths)
dirs_with_gofiles = set(
os.path.dirname(p) for p in test_paths if p.endswith('.go'))
command = ['go', 'test', '-vet=all']
# Note: We sort the directories to be deterministic.
return [
TestSpec(directory=d, command=command) for d in sorted(dirs_with_gofiles)
def main(argv):
default_toolchain_utils = os.path.abspath(os.path.dirname(__file__))
parser = argparse.ArgumentParser(description=__doc__)
help='show stdout of successful tests')
help='directory of toolchain-utils. Often auto-detected')
'file', nargs='*', help='a file that we should run tests for')
args = parser.parse_args(argv)
modified_files = [os.path.abspath(f) for f in args.file]
show_all_output = args.show_all_output
toolchain_utils = args.toolchain_utils
if not modified_files:
print('No files given. Exit.')
return 0
tests_to_run = _find_forced_subdir_python_tests(modified_files,
for f in modified_files:
tests_to_run += _autodetect_python_tests_for(f, toolchain_utils)
tests_to_run += _find_go_tests(modified_files)
# TestSpecs have lists, so we can't use a set. We'd likely want to keep them
# sorted for determinism anyway.
tests_to_run = _compress_list(tests_to_run)
success = _run_test_scripts(tests_to_run, show_all_output)
return 0 if success else 1
if __name__ == '__main__':