test_util.py
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# SPDX-License-Identifier: GPL-2.0+
#
# Copyright (c) 2016 Google, Inc
#
from __future__ import print_function
from contextlib import contextmanager
import glob
import os
import sys
import command
try:
from StringIO import StringIO
except ImportError:
from io import StringIO
PYTHON = 'python%d' % sys.version_info[0]
def RunTestCoverage(prog, filter_fname, exclude_list, build_dir, required=None):
"""Run tests and check that we get 100% coverage
Args:
prog: Program to run (with be passed a '-t' argument to run tests
filter_fname: Normally all *.py files in the program's directory will
be included. If this is not None, then it is used to filter the
list so that only filenames that don't contain filter_fname are
included.
exclude_list: List of file patterns to exclude from the coverage
calculation
build_dir: Build directory, used to locate libfdt.py
required: List of modules which must be in the coverage report
Raises:
ValueError if the code coverage is not 100%
"""
# This uses the build output from sandbox_spl to get _libfdt.so
path = os.path.dirname(prog)
if filter_fname:
glob_list = glob.glob(os.path.join(path, '*.py'))
glob_list = [fname for fname in glob_list if filter_fname in fname]
else:
glob_list = []
glob_list += exclude_list
glob_list += ['*libfdt.py', '*site-packages*', '*dist-packages*']
test_cmd = 'test' if 'binman.py' in prog else '-t'
cmd = ('PYTHONPATH=$PYTHONPATH:%s/sandbox_spl/tools %s-coverage run '
'--omit "%s" %s %s -P1' % (build_dir, PYTHON, ','.join(glob_list),
prog, test_cmd))
os.system(cmd)
stdout = command.Output('%s-coverage' % PYTHON, 'report')
lines = stdout.splitlines()
if required:
# Convert '/path/to/name.py' just the module name 'name'
test_set = set([os.path.splitext(os.path.basename(line.split()[0]))[0]
for line in lines if '/etype/' in line])
missing_list = required
missing_list.discard('__init__')
missing_list.difference_update(test_set)
if missing_list:
print('Missing tests for %s' % (', '.join(missing_list)))
print(stdout)
ok = False
coverage = lines[-1].split(' ')[-1]
ok = True
print(coverage)
if coverage != '100%':
print(stdout)
print("Type '%s-coverage html' to get a report in "
'htmlcov/index.html' % PYTHON)
print('Coverage error: %s, but should be 100%%' % coverage)
ok = False
if not ok:
raise ValueError('Test coverage failure')
# Use this to suppress stdout/stderr output:
# with capture_sys_output() as (stdout, stderr)
# ...do something...
@contextmanager
def capture_sys_output():
capture_out, capture_err = StringIO(), StringIO()
old_out, old_err = sys.stdout, sys.stderr
try:
sys.stdout, sys.stderr = capture_out, capture_err
yield capture_out, capture_err
finally:
sys.stdout, sys.stderr = old_out, old_err