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# Copyright (c) 2015 Hewlett-Packard Development Company, L.P. (HP)
#
# 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 os
import re
import subprocess
import sys
import tempfile
import time
try:
# python 2
from urllib2 import urlopen
except ImportError:
# python 3
from urllib.request import urlopen
import fixtures
from pbr.tests import base
class TestWsgiScripts(base.BaseTestCase):
cmd_names = ('pbr_test_wsgi', 'pbr_test_wsgi_with_class')
def test_wsgi_script_install(self):
"""Test that we install a non-pkg-resources wsgi script."""
if os.name == 'nt':
self.skipTest('Windows support is passthrough')
stdout, _, return_code = self.run_setup(
'install', '--prefix=%s' % self.temp_dir)
self.useFixture(
fixtures.EnvironmentVariable(
'PYTHONPATH', ".:%s/lib/python%s.%s/site-packages" % (
self.temp_dir,
sys.version_info[0],
sys.version_info[1])))
self._check_wsgi_install_content(stdout)
def test_wsgi_script_run(self):
"""Test that we install a runnable wsgi script.
This test actually attempts to start and interact with the
wsgi script in question to demonstrate that it's a working
wsgi script using simple server. It's a bit hokey because of
process management that has to be done.
"""
self.skipTest("Test skipped until we can determine a reliable "
"way to capture subprocess stdout without blocking")
if os.name == 'nt':
self.skipTest('Windows support is passthrough')
stdout, _, return_code = self.run_setup(
'install', '--prefix=%s' % self.temp_dir)
self.useFixture(
fixtures.EnvironmentVariable(
'PYTHONPATH', ".:%s/lib/python%s.%s/site-packages" % (
self.temp_dir,
sys.version_info[0],
sys.version_info[1])))
# NOTE(sdague): making python unbuffered is critical to
# getting output out of the subprocess.
self.useFixture(
fixtures.EnvironmentVariable(
'PYTHONUNBUFFERED', '1'))
self._check_wsgi_install_content(stdout)
# Live test run the scripts and see that they respond to wsgi
# requests.
self._test_wsgi()
def _test_wsgi(self):
for cmd_name in self.cmd_names:
cmd = os.path.join(self.temp_dir, 'bin', cmd_name)
stdout = tempfile.NamedTemporaryFile()
print("Running %s > %s" % (cmd, stdout.name))
# NOTE(sdague): ok, this looks a little janky, and it
# is. However getting python to not hang with
# popen.communicate is beyond me.
#
# We're opening with a random port (so no conflicts), and
# redirecting all stdout and stderr to files. We can then
# safely read these files and not deadlock later in the
# test. This requires shell expansion.
p = subprocess.Popen(
"%s -p 0 > %s 2>&1" % (cmd, stdout.name),
shell=True,
close_fds=True,
cwd=self.temp_dir)
self.addCleanup(p.kill)
# the sleep is important to force a context switch to the
# subprocess
time.sleep(0.1)
stdoutdata = stdout.read()
self.assertIn(
"STARTING test server pbr_testpackage.wsgi",
stdoutdata)
self.assertIn(
"DANGER! For testing only, do not use in production",
stdoutdata)
m = re.search('(http://[^:]+:\d+)/', stdoutdata)
self.assertIsNotNone(m, "Regex failed to match on %s" % stdoutdata)
f = urlopen(m.group(1))
self.assertEqual("Hello World", f.read())
# the sleep is important to force a context switch to the
# subprocess
time.sleep(0.1)
# Kill off the child, it should force a flush of the stdout.
p.kill()
time.sleep(0.1)
stdoutdata = stdout.read()
# we should have logged an HTTP request, return code 200, that
# returned 11 bytes
self.assertIn('"GET / HTTP/1.1" 200 11', stdoutdata)
def _check_wsgi_install_content(self, install_stdout):
for cmd_name in self.cmd_names:
install_txt = 'Installing %s script to %s' % (cmd_name,
self.temp_dir)
self.assertIn(install_txt, install_stdout)
cmd_filename = os.path.join(self.temp_dir, 'bin', cmd_name)
script_txt = open(cmd_filename, 'r').read()
self.assertNotIn('pkg_resources', script_txt)
main_block = """if __name__ == "__main__":
import argparse
import socket
import wsgiref.simple_server as wss"""
if cmd_name == 'pbr_test_wsgi':
app_name = "main"
else:
app_name = "WSGI.app"
starting_block = ("STARTING test server pbr_testpackage.wsgi."
"%s" % app_name)
else_block = """else:
application = %s()""" % app_name
self.assertIn(main_block, script_txt)
self.assertIn(starting_block, script_txt)
self.assertIn(else_block, script_txt)
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