grpc/templates/test/cpp/naming/resolver_component_tests_defs.include

<%def name="resolver_component_tests(tests)">#!/usr/bin/env python
# Copyright 2015 gRPC authors.
#
# 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.

# This file is auto-generated

import argparse
import sys
import subprocess
import tempfile
import os
import time
import signal


argp = argparse.ArgumentParser(description='Run c-ares resolver tests')
argp.add_argument('--test_bin_path', default=None, type=str,
                  help='Path to gtest test binary to invoke.')
argp.add_argument('--dns_server_bin_path', default=None, type=str,
                  help='Path to local DNS server python script.')
argp.add_argument('--records_config_path', default=None, type=str,
                  help=('Path to DNS records yaml file that '
                        'specifies records for the DNS sever. '))
argp.add_argument('--dns_server_port', default=None, type=int,
                  help=('Port that local DNS server is listening on.'))
argp.add_argument('--dns_resolver_bin_path', default=None, type=str,
                  help=('Path to the DNS health check utility.'))
argp.add_argument('--tcp_connect_bin_path', default=None, type=str,
                  help=('Path to the TCP health check utility.'))
args = argp.parse_args()

def test_runner_log(msg):
  sys.stderr.write('\n%s: %s\n' % (__file__, msg))

cur_resolver = os.environ.get('GRPC_DNS_RESOLVER')
if cur_resolver and cur_resolver != 'ares':
  test_runner_log(('WARNING: cur resolver set to %s. This set of tests '
      'needs to use GRPC_DNS_RESOLVER=ares.'))
  test_runner_log('Exit 1 without running tests.')
  sys.exit(1)
os.environ.update({'GRPC_DNS_RESOLVER': 'ares'})

def wait_until_dns_server_is_up(args,
                                dns_server_subprocess,
                                dns_server_subprocess_output):
  for i in range(0, 30):
    test_runner_log('Health check: attempt to connect to DNS server over TCP.')
    tcp_connect_subprocess = subprocess.Popen([
        args.tcp_connect_bin_path,
        '--server_host', '127.0.0.1',
        '--server_port', str(args.dns_server_port),
        '--timeout', str(1)])
    tcp_connect_subprocess.communicate()
    if tcp_connect_subprocess.returncode == 0:
      test_runner_log(('Health check: attempt to make an A-record '
                       'query to DNS server.'))
      dns_resolver_subprocess = subprocess.Popen([
          args.dns_resolver_bin_path,
          '--qname', 'health-check-local-dns-server-is-alive.resolver-tests.grpctestingexp',
          '--server_host', '127.0.0.1',
          '--server_port', str(args.dns_server_port)],
          stdout=subprocess.PIPE)
      dns_resolver_stdout, _ = dns_resolver_subprocess.communicate()
      if dns_resolver_subprocess.returncode == 0:
        if '123.123.123.123' in dns_resolver_stdout:
          test_runner_log(('DNS server is up! '
                           'Successfully reached it over UDP and TCP.'))
        return
    time.sleep(0.1)
  dns_server_subprocess.kill()
  dns_server_subprocess.wait()
  test_runner_log(('Failed to reach DNS server over TCP and/or UDP. '
                   'Exitting without running tests.'))
  test_runner_log('======= DNS server stdout '
                  '(merged stdout and stderr) =============')
  with open(dns_server_subprocess_output, 'r') as l:
    test_runner_log(l.read())
  test_runner_log('======= end DNS server output=========')
  sys.exit(1)

dns_server_subprocess_output = tempfile.mktemp()
with open(dns_server_subprocess_output, 'w') as l:
  dns_server_subprocess = subprocess.Popen([
      args.dns_server_bin_path,
      '--port', str(args.dns_server_port),
      '--records_config_path', args.records_config_path],
      stdin=subprocess.PIPE,
      stdout=l,
      stderr=l)

def _quit_on_signal(signum, _frame):
  test_runner_log('Received signal: %d' % signum)
  dns_server_subprocess.kill()
  dns_server_subprocess.wait()
  sys.exit(1)

signal.signal(signal.SIGINT, _quit_on_signal)
signal.signal(signal.SIGTERM, _quit_on_signal)
wait_until_dns_server_is_up(args,
                            dns_server_subprocess,
                            dns_server_subprocess_output)
num_test_failures = 0

% for test in tests:
test_runner_log('Run test with target: %s' % '${test['target_name']}')\

current_test_subprocess = subprocess.Popen([\

  args.test_bin_path,\

  '--target_name', '${test['target_name']}',\

  '--expected_addrs', '${test['expected_addrs']}',\

  '--expected_chosen_service_config', '${test['expected_chosen_service_config']}',\

  '--expected_lb_policy', '${test['expected_lb_policy']}',\

  '--local_dns_server_address', '127.0.0.1:%d' % args.dns_server_port])\

current_test_subprocess.communicate()\

if current_test_subprocess.returncode != 0:\

  num_test_failures += 1

% endfor
test_runner_log('now kill DNS server')
dns_server_subprocess.kill()
dns_server_subprocess.wait()
test_runner_log('%d tests failed.' % num_test_failures)
sys.exit(num_test_failures)</%def>