brozzler/tests/test_brozzling.py

#!/usr/bin/env python
'''
test_brozzling.py - XXX explain

Copyright (C) 2016 Internet Archive

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 pytest
import brozzler
import logging
import os
import http.server
import threading
import argparse

args = argparse.Namespace()
args.log_level = logging.INFO
brozzler.cli._configure_logging(args)

@pytest.fixture(scope='module')
def httpd(request):
    # SimpleHTTPRequestHandler always uses CWD so we have to chdir
    os.chdir(os.path.join(os.path.dirname(__file__), 'htdocs'))

    httpd = http.server.HTTPServer(
            ('localhost', 0), http.server.SimpleHTTPRequestHandler)
    httpd_thread = threading.Thread(name='httpd', target=httpd.serve_forever)
    httpd_thread.start()

    def fin():
        httpd.shutdown()
        httpd.server_close()
        httpd_thread.join()
    request.addfinalizer(fin)

    return httpd

def test_httpd(httpd):
    '''
    Tests that our http server is working as expected, and that two fetches
    of the same url return the same payload, proving it can be used to test
    deduplication.
    '''
    payload1 = content2 = None
    url = 'http://localhost:%s/site1/file1.txt' % httpd.server_port
    with urllib.request.urlopen(url) as response:
        assert response.status == 200
        payload1 = response.read()
        assert payload1

    with urllib.request.urlopen(url) as response:
        assert response.status == 200
        payload2 = response.read()
        assert payload2

    assert payload1 == payload2

def test_aw_snap_hes_dead_jim():
    chrome_exe = brozzler.suggest_default_chrome_exe()
    with brozzler.Browser(chrome_exe=chrome_exe) as browser:
        with pytest.raises(brozzler.BrowsingException):
            browser.browse_page('chrome://crash')

def test_on_response(httpd):
    response_urls = []
    def on_response(msg):
        response_urls.append(msg['params']['response']['url'])

    chrome_exe = brozzler.suggest_default_chrome_exe()
    url = 'http://localhost:%s/site3/page.html' % httpd.server_port
    with brozzler.Browser(chrome_exe=chrome_exe) as browser:
        browser.browse_page(url, on_response=on_response)
        browser.browse_page(url)
    assert response_urls[0] == 'http://localhost:%s/site3/page.html' % httpd.server_port
    assert response_urls[1] == 'http://localhost:%s/site3/brozzler.svg' % httpd.server_port
    assert response_urls[2] == 'http://localhost:%s/favicon.ico' % httpd.server_port