django-anymail/djrill/tests.py

from mock import patch
import sys

from django.conf import settings
from django.contrib import admin
from django.contrib.auth.models import User
from django.core import mail
from django.core.exceptions import ImproperlyConfigured
from django.test import TestCase
from django.utils import simplejson as json

from djrill.mail import DjrillMessage

class DjrillBackendMockAPITestCase(TestCase):
    """TestCase that uses Djrill EmailBackend with a mocked Mandrill API"""

    class MockResponse:
        """requests.post return value mock sufficient for DjrillBackend"""
        def __init__(self, status_code=200, content="{}"):
            self.status_code = status_code
            self.content = content

    def setUp(self):
        self.patch = patch('requests.post')
        self.mock_post = self.patch.start()
        self.mock_post.return_value = self.MockResponse()

        settings.MANDRILL_API_KEY = "FAKE_API_KEY_FOR_TESTING"
        settings.MANDRILL_API_URL = "http://mandrillapp.com/api/1.0"

        # Django TestCase sets up locmem EmailBackend; override it here
        self.original_email_backend = settings.EMAIL_BACKEND
        settings.EMAIL_BACKEND = "djrill.mail.backends.djrill.DjrillBackend"

    def tearDown(self):
        self.patch.stop()
        settings.EMAIL_BACKEND = self.original_email_backend

    def get_api_call_data(self):
        """Returns the data posted to the Mandrill API.

        Fails test if API wasn't called.
        """
        if self.mock_post.call_args is None:
            raise AssertionError("Mandrill API was not called")
        (args, kwargs) = self.mock_post.call_args
        if 'data' not in kwargs:
            raise AssertionError("requests.post was called without data kwarg "
                "-- Maybe tests need to be updated for backend changes?")
        return json.loads(kwargs['data'])


class DjrillBackendTests(DjrillBackendMockAPITestCase):
    """Test Djrill's support for Django mail wrappers"""

    def test_send_mail(self):
        mail.send_mail('Subject here', 'Here is the message.',
            'from@example.com', ['to@example.com'], fail_silently=False)
        data = self.get_api_call_data()
        self.assertEqual(data['message']['subject'], "Subject here")
        self.assertEqual(data['message']['text'], "Here is the message.")
        self.assertFalse('from_name' in data['message'])
        self.assertEqual(data['message']['from_email'], "from@example.com")
        self.assertEqual(len(data['message']['to']), 1)
        self.assertEqual(data['message']['to'][0]['email'], "to@example.com")

    def test_missing_api_key(self):
        del settings.MANDRILL_API_KEY
        with self.assertRaises(ImproperlyConfigured):
            mail.send_mail('Subject', 'Message', 'from@example.com',
                ['to@example.com'])

    def test_name_addr(self):
        """Make sure RFC2822 name-addr format (with display-name) is allowed

        (Test both sender and recipient addresses)
        """
        mail.send_mail('Subject', 'Message', 'From Name <from@example.com>',
            ['Recipient #1 <to1@example.com>', 'to2@example.com'])
        data = self.get_api_call_data()
        self.assertEqual(data['message']['from_name'], "From Name")
        self.assertEqual(data['message']['from_email'], "from@example.com")
        self.assertEqual(len(data['message']['to']), 2)
        self.assertEqual(data['message']['to'][0]['name'], "Recipient #1")
        self.assertEqual(data['message']['to'][0]['email'], "to1@example.com")
        self.assertEqual(data['message']['to'][1]['name'], "")
        self.assertEqual(data['message']['to'][1]['email'], "to2@example.com")

    def test_email_message(self):
        email = mail.EmailMessage('Subject', 'Body goes here',
            'from@example.com',
            ['to1@example.com', 'Also To <to2@example.com>'],
            bcc=['bcc1@example.com', 'Also BCC <bcc2@example.com>'],
            cc=['cc1@example.com', 'Also CC <cc2@example.com>'],
            headers={'Reply-To': 'another@example.com',
                     'X-MyHeader': 'my value',
                     'Errors-To': 'silently stripped'})
        email.send()
        data = self.get_api_call_data()
        self.assertEqual(data['message']['subject'], "Subject")
        self.assertEqual(data['message']['text'], "Body goes here")
        self.assertEqual(data['message']['from_email'], "from@example.com")
        self.assertEqual(data['message']['headers'],
            { 'Reply-To': 'another@example.com', 'X-MyHeader': 'my value' })
        # Mandrill doesn't have a notion of cc, and only allows a single bcc.
        # Djrill just treats cc and bcc as though they were "to" addresses,
        # which may or may not be what you want.
        self.assertEqual(len(data['message']['to']), 6)
        self.assertEqual(data['message']['to'][0]['email'], "to1@example.com")
        self.assertEqual(data['message']['to'][1]['email'], "to2@example.com")
        self.assertEqual(data['message']['to'][2]['email'], "cc1@example.com")
        self.assertEqual(data['message']['to'][3]['email'], "cc2@example.com")
        self.assertEqual(data['message']['to'][4]['email'], "bcc1@example.com")
        self.assertEqual(data['message']['to'][5]['email'], "bcc2@example.com")

    def test_html_message(self):
        text_content = 'This is an important message.'
        html_content = '<p>This is an <strong>important</strong> message.</p>'
        email = mail.EmailMultiAlternatives('Subject', text_content,
            'from@example.com', ['to@example.com'])
        email.attach_alternative(html_content, "text/html")
        email.send()
        data = self.get_api_call_data()
        self.assertEqual(data['message']['text'], text_content)
        self.assertEqual(data['message']['html'], html_content)

    def test_alternative_errors(self):
        # Multiple alternatives not allowed
        email = mail.EmailMultiAlternatives('Subject', 'Body',
            'from@example.com', ['to@example.com'])
        email.attach_alternative("<p>First html is OK</p>", "text/html")
        email.attach_alternative("<p>But not second html</p>", "text/html")
        with self.assertRaises(ValueError):
            email.send()

        # Only html alternatives allowed
        email = mail.EmailMultiAlternatives('Subject', 'Body',
            'from@example.com', ['to@example.com'])
        email.attach_alternative("{'not': 'allowed'}", "application/json")
        with self.assertRaises(ValueError):
            email.send()

        # Make sure fail_silently is respected
        email = mail.EmailMultiAlternatives('Subject', 'Body',
            'from@example.com', ['to@example.com'])
        email.attach_alternative("{'not': 'allowed'}", "application/json")
        sent = email.send(fail_silently=True)
        self.assertFalse(self.mock_post.called,
            msg="Mandrill API should not be called when send fails silently")
        self.assertEqual(sent, 0)


def reset_admin_site():
    """Return the Django admin globals to their original state"""
    admin.site = admin.AdminSite() # restore default
    if 'djrill.admin' in sys.modules:
        del sys.modules['djrill.admin'] # force autodiscover to re-import


class DjrillAdminTests(DjrillBackendMockAPITestCase):
    """Test the Djrill admin site"""

    # These tests currently just verify that the admin site pages load
    # without error -- they don't test any Mandrill-supplied content.
    # (Future improvements could mock the Mandrill responses.)

    # These urls set up the DjrillAdminSite as suggested in the readme
    urls = 'djrill.test_admin_urls'

    @classmethod
    def setUpClass(cls):
        # Other test cases may muck with the Django admin site globals,
        # so return it to the default state before loading test_admin_urls
        reset_admin_site()

    def setUp(self):
        super(DjrillAdminTests, self).setUp()
        # Must be authenticated staff to access admin site...
        admin = User.objects.create_user('admin', 'admin@example.com', 'secret')
        admin.is_staff = True
        admin.save()
        self.client.login(username='admin', password='secret')

    def test_admin_senders(self):
        response = self.client.get('/admin/djrill/senders/')
        self.assertEqual(response.status_code, 200)
        self.assertContains(response, "Senders")

    def test_admin_status(self):
        response = self.client.get('/admin/djrill/status/')
        self.assertEqual(response.status_code, 200)
        self.assertContains(response, "Status")

    def test_admin_tags(self):
        response = self.client.get('/admin/djrill/tags/')
        self.assertEqual(response.status_code, 200)
        self.assertContains(response, "Tags")

    def test_admin_urls(self):
        response = self.client.get('/admin/djrill/urls/')
        self.assertEqual(response.status_code, 200)
        self.assertContains(response, "URLs")

    def test_admin_index(self):
        """Make sure Djrill section is included in the admin index page"""
        response = self.client.get('/admin/')
        self.assertEqual(response.status_code, 200)
        self.assertContains(response, "Djrill")


class DjrillNoAdminTests(TestCase):
    def test_admin_autodiscover_without_djrill(self):
        """Make sure autodiscover doesn't die without DjrillAdminSite"""
        reset_admin_site()
        admin.autodiscover() # test: this shouldn't error


class DjrillMessageTests(TestCase):
    def setUp(self):
        self.subject = "Djrill baby djrill."
        self.from_name = "Tarzan"
        self.from_email = "test@example"
        self.to = ["King Kong <kingkong@example.com>",
            "Cheetah <cheetah@example.com", "bubbles@example.com"]
        self.text_content = "Wonderful fallback text content."
        self.html_content = "<h1>That's a nice HTML email right there.</h1>"
        self.headers = {"Reply-To": "tarzan@example.com"}
        self.tags = ["track", "this"]

    def test_djrill_message_success(self):
        msg = DjrillMessage(self.subject, self.text_content, self.from_email,
            self.to, tags=self.tags, headers=self.headers,
            from_name=self.from_name)

        self.assertIsInstance(msg, DjrillMessage)
        self.assertEqual(msg.body, self.text_content)
        self.assertEqual(msg.recipients(), self.to)
        self.assertEqual(msg.tags, self.tags)
        self.assertEqual(msg.extra_headers, self.headers)
        self.assertEqual(msg.from_name, self.from_name)

    def test_djrill_message_html_success(self):
        msg = DjrillMessage(self.subject, self.text_content, self.from_email,
            self.to, tags=self.tags)
        msg.attach_alternative(self.html_content, "text/html")

        self.assertEqual(msg.alternatives[0][0], self.html_content)

    def test_djrill_message_tag_failure(self):
        with self.assertRaises(ImproperlyConfigured):
            DjrillMessage(self.subject, self.text_content, self.from_email,
                self.to, tags=["_fail"])

    def test_djrill_message_tag_skip(self):
        """
        Test that tags over 50 chars are not included in the tags list.
        """
        tags = ["works", "awesomesauce",
         "iwilltestmycodeiwilltestmycodeiwilltestmycodeiwilltestmycode"]
        msg = DjrillMessage(self.subject, self.text_content, self.from_email,
            self.to, tags=tags)

        self.assertIsInstance(msg, DjrillMessage)
        self.assertIn(tags[0], msg.tags)
        self.assertIn(tags[1], msg.tags)
        self.assertNotIn(tags[2], msg.tags)