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# Copyright 2016 Google Inc. All Rights Reserved.

#

# Licensed under the Apache License, Version 2.0 (the "License");

# you may not use this file except in compliance with the License.

# You may obtain a copy of the License at

#

# http://www.apache.org/licenses/LICENSE-2.0

#

# Unless required by applicable law or agreed to in writing, software

# distributed under the License is distributed on an "AS IS" BASIS,

# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

# See the License for the specific language governing permissions and

# limitations under the License.

import fnmatch

import os

import subprocess

import tempfile

import nox

REPO_TOOLS_REQ =\

'git+https://github.com/GoogleCloudPlatform/python-repo-tools.git'

COMMON_PYTEST_ARGS = [

'-x', '--no-success-flaky-report', '--cov', '--cov-config',

'.coveragerc', '--cov-append', '--cov-report=']

# Speech is temporarily disabled.

TESTS_BLACKLIST = set(('appengine', 'testing', 'speech'))

APPENGINE_BLACKLIST = set()

def list_files(folder, pattern):

for root, folders, files in os.walk(folder):

for filename in files:

if fnmatch.fnmatch(filename, pattern):

yield os.path.join(root, filename)

def collect_sample_dirs(start_dir, blacklist=set()):

"""Recursively collects a list of dirs that contain tests."""

# Collect all the directories that have tests in them.

for parent, subdirs, files in os.walk(start_dir):

if any(f for f in files if f[-8:] == '_test.py'):

# Don't recurse further, since py.test will do that.

del subdirs[:]

# This dir has tests in it. yield it.

yield parent

else:

# Filter out dirs we don't want to recurse into

subdirs[:] = [s for s in subdirs

if s[0].isalpha() and s not in blacklist]

def get_changed_files():

pr = os.environ.get('TRAVIS_PULL_REQUEST')

if pr == 'false':

# This is not a pull request.

changed = subprocess.check_output(

['git', 'show', '--pretty=format:', '--name-only',

os.environ.get('TRAVIS_COMMIT')])

elif pr is not None:

changed = subprocess.check_output(

['git', 'diff', '--name-only',

os.environ.get('TRAVIS_COMMIT'),

os.environ.get('TRAVIS_BRANCH')])

else:

changed = ''

print('Uh... where are we?')

return set([x for x in changed.split('\n') if x])

def filter_samples(sample_dirs, changed_files):

result = []

for sample_dir in sample_dirs:

if sample_dir.startswith('./'):

sample_dir = sample_dir[2:]

for changed_file in changed_files:

if changed_file.startswith(sample_dir):

result.append(sample_dir)

return result

def setup_appengine(session):

# Install the app engine sdk and setup import paths.

gae_root = os.environ.get('GAE_ROOT', tempfile.gettempdir())

session.env['PYTHONPATH'] = os.path.join(gae_root, 'google_appengine')

session.run('gcprepotools', 'download-appengine-sdk', gae_root)

# Create a lib directory to prevent the GAE vendor library from

# complaining.

if not os.path.exists('lib'):

os.makedirs('lib')

def run_tests_in_sesssion(

session, interpreter, use_appengine=False, skip_flaky=False,

changed_only=False):

session.interpreter = interpreter

session.install(REPO_TOOLS_REQ)

session.install('-r', 'requirements-{}-dev.txt'.format(interpreter))

if use_appengine:

setup_appengine(session)

sample_root = 'appengine'

else:

sample_root = '.'

pytest_args = COMMON_PYTEST_ARGS[:]

if skip_flaky:

pytest_args.append('-m not slow and not flaky')

# session.posargs is any leftover arguments from the command line, which

# allows users to run a particular test instead of all of them.

if session.posargs:

sample_directories = session.posargs

else:

sample_directories = collect_sample_dirs(

sample_root,

TESTS_BLACKLIST if not use_appengine else APPENGINE_BLACKLIST)

if changed_only:

changed_files = get_changed_files()

sample_directories = filter_samples(

sample_directories, changed_files)

print('Running tests on a subset of samples: ')

print('\n'.join(sample_directories))

for sample in sample_directories:

# Install additional dependencies if they exist

dirname = sample if os.path.isdir(sample) else os.path.dirname(sample)

for reqfile in list_files(dirname, 'requirements*.txt'):

session.install('-r', reqfile)

session.run(

'py.test', sample,

*pytest_args,

success_codes=[0, 5]) # Treat no test collected as success.

@nox.parametrize('interpreter', ['python2.7', 'python3.4'])

def session_tests(session, interpreter):

run_tests_in_sesssion(session, interpreter)

def session_gae(session):

run_tests_in_sesssion(

session, 'python2.7', use_appengine=True)

@nox.parametrize('subsession', ['gae', 'tests'])

def session_travis(session, subsession):

"""On travis, just run with python3.4 and don't run slow or flaky tests."""

if subsession == 'tests':

run_tests_in_sesssion(

session, 'python3.4', skip_flaky=True, changed_only=True)

else:

run_tests_in_sesssion(

session, 'python2.7', use_appengine=True, skip_flaky=True,

changed_only=True)

def session_lint(session):

session.install('flake8', 'flake8-import-order')

session.run(

'flake8', '--builtin=gettext', '--max-complexity=10',

'--import-order-style=google',

'--exclude',

'container_engine/django_tutorial/polls/migrations/*,.nox,.cache,env',

*(session.posargs or ['.']))

def session_reqcheck(session):

session.install(REPO_TOOLS_REQ)

if 'update' in session.posargs:

command = 'update-requirements'

else:

command = 'check-requirements'

for reqfile in list_files('.', 'requirements*.txt'):

session.run('gcprepotools', command, reqfile)