devtools/qunit.py
author Sylvain Thénault <sylvain.thenault@logilab.fr>
Mon, 17 Jan 2011 12:43:07 +0100
branchstable
changeset 6835 87e2641d75f7
parent 6535 972bd504daf6
child 7051 34d8b36480a9
permissions -rw-r--r--
[doc] major rework of the simple blog tutorial

import os, os.path as osp
import signal
from tempfile import mkdtemp, NamedTemporaryFile, TemporaryFile
import tempfile
from Queue import Queue, Empty
from subprocess import Popen, check_call, CalledProcessError
from shutil import rmtree, copy as copyfile
from uuid import uuid4 

# imported by default to simplify further import statements
from logilab.common.testlib import unittest_main, with_tempdir, InnerTest
from logilab.common.shellutils import getlogin

import cubicweb
from cubicweb.view import StartupView
from cubicweb.web.controller import Controller
from cubicweb.devtools.httptest import CubicWebServerTC


class VerboseCalledProcessError(CalledProcessError):

    def __init__(self, returncode, command, stdout, stderr):
        super(VerboseCalledProcessError, self).__init__(returncode, command)
        self.stdout = stdout
        self.stderr = stderr

    def __str__(self):
        str = [ super(VerboseCalledProcessError, self).__str__()]
        if self.stdout.strip():
            str.append('******************')
            str.append('* process stdout *')
            str.append('******************')
            str.append(self.stdout)
        if self.stderr.strip():
            str.append('******************')
            str.append('* process stderr *')
            str.append('******************')
            str.append(self.stderr)
        return '\n'.join(str)



class FirefoxHelper(object):

    profile_name_mask = 'PYTEST_PROFILE_%(uid)s'

    def __init__(self, url=None):
        self._process = None
        self._tmp_dir = mkdtemp()
        self._profile_data = {'uid': uuid4()}
        self._profile_name = self.profile_name_mask % self._profile_data
        fnull = open(os.devnull, 'w')
        stdout = TemporaryFile()
        stderr = TemporaryFile()
        try:
            home = osp.expanduser('~')
            user = getlogin()
            assert os.access(home, os.W_OK), \
                   'No write access to your home directory, Firefox will crash.'\
                   ' Are you sure "%s" is a valid home  for user "%s"' % (home, user)
            check_call(['firefox', '-no-remote', '-CreateProfile',
                        '%s %s' % (self._profile_name, self._tmp_dir)],
                                  stdout=stdout, stderr=stderr)
        except CalledProcessError, cpe:
            stdout.seek(0)
            stderr.seek(0)
            raise VerboseCalledProcessError(cpe.returncode, cpe.cmd, stdout.read(), stderr.read())

    def start(self, url):
        self.stop()
        fnull = open(os.devnull, 'w')
        self._process = Popen(['firefox', '-no-remote', '-P', self._profile_name, url],
                              stdout=fnull, stderr=fnull)

    def stop(self):
        if self._process is not None:
            assert self._process.returncode is None,  self._process.returncode
            os.kill(self._process.pid, signal.SIGTERM)
            self._process.wait()
            self._process = None

    def __del__(self):
        self.stop()
        rmtree(self._tmp_dir)


class QUnitTestCase(CubicWebServerTC):

    # testfile, (dep_a, dep_b)
    all_js_tests = ()

    def setUp(self):
        super(QUnitTestCase, self).setUp()
        self.test_queue = Queue()
        class MyQUnitResultController(QUnitResultController):
            tc = self
            test_queue = self.test_queue
        self._qunit_controller = MyQUnitResultController
        self.vreg.register(MyQUnitResultController)

    def tearDown(self):
        super(QUnitTestCase, self).tearDown()
        self.vreg.unregister(self._qunit_controller)


    def abspath(self, path):
        """use self.__module__ to build absolute path if necessary"""
        if not osp.isabs(path):
           dirname = osp.dirname(__import__(self.__module__).__file__)
           return osp.abspath(osp.join(dirname,path))
        return path

    def test_javascripts(self):
        for args in self.all_js_tests:
            test_file = self.abspath(args[0])
            if len(args) > 1:
                depends   = [self.abspath(dep) for dep in args[1]]
            else:
                depends = ()
            if len(args) > 2:
                data   = [self.abspath(data) for data in args[2]]
            else:
                data = ()
            for js_test in self._test_qunit(test_file, depends, data):
                yield js_test

    @with_tempdir
    def _test_qunit(self, test_file, depends=(), data_files=(), timeout=30):
        assert osp.exists(test_file), test_file
        for dep in depends:
            assert osp.exists(dep), dep
        for data in data_files:
            assert osp.exists(data), data

        # generate html test file
        jquery_dir = 'file://' + self.config.locate_resource('jquery.js')[0]
        html_test_file = NamedTemporaryFile(suffix='.html')
        html_test_file.write(make_qunit_html(test_file, depends,
                             base_url=self.config['base-url'],
                             web_data_path=jquery_dir))
        html_test_file.flush()
        # copying data file
        for data in data_files:
            copyfile(data, tempfile.tempdir)

        while not self.test_queue.empty():
            self.test_queue.get(False)

        browser = FirefoxHelper()
        browser.start(html_test_file.name)
        test_count = 0
        error = False
        def raise_exception(cls, *data):
            raise cls(*data)
        while not error:
            try:
                result, test_name, msg = self.test_queue.get(timeout=timeout)
                test_name = '%s (%s)' % (test_name, test_file)
                self.set_description(test_name)
                if result is None:
                    break
                test_count += 1
                if result:
                    yield InnerTest(test_name, lambda : 1)
                else:
                    yield InnerTest(test_name, self.fail, msg)
            except Empty:
                error = True
                yield InnerTest(test_file, raise_exception, RuntimeError, "%s did not report execution end. %i test processed so far." % (test_file, test_count))

        browser.stop()
        if test_count <= 0 and not error:
            yield InnerTest(test_name, raise_exception, RuntimeError, 'No test yielded by qunit for %s' % test_file)

class QUnitResultController(Controller):

    __regid__ = 'qunit_result'


    # Class variables to circumvent the instantiation of a new Controller for each request.
    _log_stack = [] # store QUnit log messages
    _current_module_name = '' # store the current QUnit module name

    def publish(self, rset=None):
        event = self._cw.form['event']
        getattr(self, 'handle_%s' % event)()

    def handle_module_start(self):
        self.__class__._current_module_name = self._cw.form.get('name', '')

    def handle_test_done(self):
        name = '%s // %s' %  (self._current_module_name, self._cw.form.get('name', ''))
        failures = int(self._cw.form.get('failures', 0))
        total = int(self._cw.form.get('total', 0))

        self._log_stack.append('%i/%i assertions failed' % (failures, total))
        msg = '\n'.join(self._log_stack)

        if failures:
            self.tc.test_queue.put((False, name, msg))
        else:
            self.tc.test_queue.put((True, name, msg))
        self._log_stack[:] = []

    def handle_done(self):
        self.tc.test_queue.put((None, None, None))

    def handle_log(self):
        result = self._cw.form['result']
        message = self._cw.form['message']
        self._log_stack.append('%s: %s' % (result, message))


def cw_path(*paths):
  return file_path(osp.join(cubicweb.CW_SOFTWARE_ROOT, *paths))

def file_path(path):
    return 'file://' + osp.abspath(path)

def build_js_script(host):
    return """
    var host = '%s';

    QUnit.moduleStart = function (name) {
      jQuery.ajax({
                  url: host+'/qunit_result',
                 data: {"event": "module_start",
                        "name": name},
                 async: false});
    }

    QUnit.testDone = function (name, failures, total) {
      jQuery.ajax({
                  url: host+'/qunit_result',
                 data: {"event": "test_done",
                        "name": name,
                        "failures": failures,
                        "total":total},
                 async: false});
    }

    QUnit.done = function (failures, total) {
      jQuery.ajax({
                   url: host+'/qunit_result',
                   data: {"event": "done",
                          "failures": failures,
                          "total":total},
                   async: false});
      window.close();
    }

    QUnit.log = function (result, message) {
      jQuery.ajax({
                   url: host+'/qunit_result',
                   data: {"event": "log",
                          "result": result,
                          "message": message},
                   async: false});
    }
    """ % host

def make_qunit_html(test_file, depends=(), base_url=None,
                    web_data_path=cw_path('web', 'data')):
    """"""
    data = {
            'web_data': web_data_path,
            'web_test': cw_path('devtools', 'data'),
        }

    html = ['''<html>
  <head>
    <!-- JS lib used as testing framework -->
    <link rel="stylesheet" type="text/css" media="all" href="%(web_test)s/qunit.css" />
    <script src="%(web_data)s/jquery.js" type="text/javascript"></script>
    <script src="%(web_test)s/cwmock.js" type="text/javascript"></script>
    <script src="%(web_test)s/qunit.js" type="text/javascript"></script>'''
    % data]
    if base_url is not None:
        html.append('<!-- result report tools -->')
        html.append('<script type="text/javascript">')
        html.append(build_js_script(base_url))
        html.append('</script>')
    html.append('<!-- Test script dependencies (tested code for example) -->')

    for dep in depends:
        html.append('    <script src="%s" type="text/javascript"></script>' % file_path(dep))

    html.append('    <!-- Test script itself -->')
    html.append('    <script src="%s" type="text/javascript"></script>'% (file_path(test_file),))
    html.append('''  </head>
  <body>
    <div id="main">
    </div>
    <h1 id="qunit-header">QUnit example</h1>
    <h2 id="qunit-banner"></h2>
    <h2 id="qunit-userAgent"></h2>
    <ol id="qunit-tests">
  </body>
</html>''')
    return u'\n'.join(html)



if __name__ == '__main__':
    unittest_main()