from django.test import Client, TestCase
from django.core.handlers.wsgi import WSGIRequest
from djangorestframework.resource import Resource

# From: http://djangosnippets.org/snippets/963/
class RequestFactory(Client):
    """
    Class that lets you create mock Request objects for use in testing.
    
    Usage:
    
    rf = RequestFactory()
    get_request = rf.get('/hello/')
    post_request = rf.post('/submit/', {'foo': 'bar'})
    
    This class re-uses the django.test.client.Client interface, docs here:
    http://www.djangoproject.com/documentation/testing/#the-test-client
    
    Once you have a request object you can pass it to any view function, 
    just as if that view had been hooked up using a URLconf.
    
    """
    def request(self, **request):
        """
        Similar to parent class, but returns the request object as soon as it
        has created it.
        """
        environ = {
            'HTTP_COOKIE': self.cookies,
            'PATH_INFO': '/',
            'QUERY_STRING': '',
            'REQUEST_METHOD': 'GET',
            'SCRIPT_NAME': '',
            'SERVER_NAME': 'testserver',
            'SERVER_PORT': 80,
            'SERVER_PROTOCOL': 'HTTP/1.1',
        }
        environ.update(self.defaults)
        environ.update(request)
        return WSGIRequest(environ)

# See: http://www.useragentstring.com/
MSIE_9_USER_AGENT = 'Mozilla/5.0 (Windows; U; MSIE 9.0; WIndows NT 9.0; en-US))'
MSIE_8_USER_AGENT = 'Mozilla/5.0 (compatible; MSIE 8.0; Windows NT 5.2; Trident/4.0; Media Center PC 4.0; SLCC1; .NET CLR 3.0.04320)'
MSIE_7_USER_AGENT = 'Mozilla/5.0 (Windows; U; MSIE 7.0; Windows NT 6.0; en-US)'
FIREFOX_4_0_USER_AGENT = 'Mozilla/5.0 (Windows; U; Windows NT 6.1; ru; rv:1.9.2.3) Gecko/20100401 Firefox/4.0 (.NET CLR 3.5.30729)'
CHROME_11_0_USER_AGENT = 'Mozilla/5.0 (Windows; U; Windows NT 6.1; en-US) AppleWebKit/534.17 (KHTML, like Gecko) Chrome/11.0.655.0 Safari/534.17'
SAFARI_5_0_USER_AGENT = 'Mozilla/5.0 (X11; U; Linux x86_64; en-ca) AppleWebKit/531.2+ (KHTML, like Gecko) Version/5.0 Safari/531.2+'
OPERA_11_0_MSIE_USER_AGENT = 'Mozilla/4.0 (compatible; MSIE 8.0; X11; Linux x86_64; pl) Opera 11.00'
OPERA_11_0_OPERA_USER_AGENT = 'Opera/9.80 (X11; Linux x86_64; U; pl) Presto/2.7.62 Version/11.00'

class UserAgentMungingTest(TestCase):
    """"""

    class MockResource(Resource):
        anon_allowed_methods = allowed_methods = ('GET',)
        def get(self, request, auth):
            return {'a':1, 'b':2, 'c':3}

    def setUp(self):
        self.rf = RequestFactory()

    def test_msie8_ua_munge_accept(self):
        """Send MSIE user agent strings and ensure that we get an HTML response,
        even if we set a */* accept header.  (Which MSIE annoyingly does)"""
        for user_agent in (MSIE_9_USER_AGENT,
                           MSIE_8_USER_AGENT,
                           MSIE_7_USER_AGENT):
            req = self.rf.get('/', HTTP_ACCEPT='*/*', HTTP_USER_AGENT=user_agent)
            resp = self.MockResource(req)
            self.assertEqual(resp['Content-Type'], 'text/html')
    
    def test_other_ua_dont_munge_accept(self):
        """Send Non-MSIE user agent strings and ensure that we get a JSON response,
        if we set a */* Accept header.  (Other browsers will correctly set the Accept header)"""
        for user_agent in (FIREFOX_4_0_USER_AGENT,
                           CHROME_11_0_USER_AGENT,
                           SAFARI_5_0_USER_AGENT,
                           OPERA_11_0_MSIE_USER_AGENT,
                           OPERA_11_0_OPERA_USER_AGENT):
            req = self.rf.get('/', HTTP_ACCEPT='*/*', HTTP_USER_AGENT=user_agent)
            resp = self.MockResource(req)
            self.assertEqual(resp['Content-Type'], 'application/json')