Move tests out of app module

(Directory structure as suggested in
[Django testing docs][1].)

[1]: https://docs.djangoproject.com/en/1.9/topics/testing/advanced/#using-the-django-test-runner-to-test-reusable-applications

tests/test_sendgrid_integration.py

@@ -0,0 +1,127 @@
+from __future__ import unicode_literals
+
+import os
+import unittest
+from datetime import datetime, timedelta
+
+from django.core.mail import send_mail
+from django.test import SimpleTestCase
+from django.test.utils import override_settings
+
+from anymail.exceptions import AnymailAPIError
+from anymail.message import AnymailMessage
+
+from .utils import AnymailTestMixin, sample_image_path
+
+# For API_KEY auth tests:
+SENDGRID_TEST_API_KEY = os.getenv('SENDGRID_TEST_API_KEY')
+
+# For USERNAME/PASSWORD auth tests:
+SENDGRID_TEST_USERNAME = os.getenv('SENDGRID_TEST_USERNAME')
+SENDGRID_TEST_PASSWORD = os.getenv('SENDGRID_TEST_PASSWORD')
+
+
+@unittest.skipUnless(SENDGRID_TEST_API_KEY,
+                     "Set SENDGRID_TEST_API_KEY environment variable "
+                     "to run SendGrid integration tests")
+@override_settings(ANYMAIL_SENDGRID_API_KEY=SENDGRID_TEST_API_KEY,
+                   EMAIL_BACKEND="anymail.backends.sendgrid.SendGridBackend")
+class SendGridBackendIntegrationTests(SimpleTestCase, AnymailTestMixin):
+    """SendGrid API integration tests
+
+    These tests run against the **live** SendGrid API, using the
+    environment variable `SENDGRID_TEST_API_KEY` as the API key
+    If those variables are not set, these tests won't run.
+
+    SendGrid doesn't offer a test mode -- it tries to send everything
+    you ask. To avoid stacking up a pile of undeliverable @example.com
+    emails, the tests use SendGrid's "sink domain" @sink.sendgrid.net.
+    https://support.sendgrid.com/hc/en-us/articles/201995663-Safely-Test-Your-Sending-Speed
+
+    """
+
+    def setUp(self):
+        super(SendGridBackendIntegrationTests, self).setUp()
+        self.message = AnymailMessage('Anymail SendGrid integration test', 'Text content',
+                                      'from@example.com', ['to@sink.sendgrid.net'])
+        self.message.attach_alternative('<p>HTML content</p>', "text/html")
+
+    def test_simple_send(self):
+        # Example of getting the SendGrid send status and message id from the message
+        sent_count = self.message.send()
+        self.assertEqual(sent_count, 1)
+
+        anymail_status = self.message.anymail_status
+        sent_status = anymail_status.recipients['to@sink.sendgrid.net'].status
+        message_id = anymail_status.recipients['to@sink.sendgrid.net'].message_id
+
+        self.assertEqual(sent_status, 'queued')  # SendGrid always queues
+        self.assertRegex(message_id, r'\<.+@example\.com\>')  # should use from_email's domain
+        self.assertEqual(anymail_status.status, {sent_status})  # set of all recipient statuses
+        self.assertEqual(anymail_status.message_id, message_id)
+
+    def test_all_options(self):
+        send_at = datetime.now().replace(microsecond=0) + timedelta(minutes=2)
+        message = AnymailMessage(
+            subject="Anymail all-options integration test FILES",
+            body="This is the text body",
+            from_email="Test From <from@example.com>",
+            to=["to1@sink.sendgrid.net", "Recipient 2 <to2@sink.sendgrid.net>"],
+            cc=["cc1@sink.sendgrid.net", "Copy 2 <cc2@sink.sendgrid.net>"],
+            bcc=["bcc1@sink.sendgrid.net", "Blind Copy 2 <bcc2@sink.sendgrid.net>"],
+            reply_to=["reply1@example.com", "Reply 2 <reply2@example.com>"],
+            headers={"X-Anymail-Test": "value"},
+
+            metadata={"meta1": "simple string", "meta2": 2},
+            send_at=send_at,
+            tags=["tag 1", "tag 2"],
+            track_clicks=True,
+            track_opens=True,
+        )
+        message.attach("attachment1.txt", "Here is some\ntext for you", "text/plain")
+        message.attach("attachment2.csv", "ID,Name\n1,Amy Lina", "text/csv")
+        cid = message.attach_inline_image_file(sample_image_path())
+        message.attach_alternative(
+            "<p><b>HTML:</b> with <a href='http://example.com'>link</a>"
+            "and image: <img src='cid:%s'></div>" % cid,
+            "text/html")
+
+        message.send()
+        self.assertEqual(message.anymail_status.status, {'queued'})  # SendGrid always queues
+
+    @override_settings(ANYMAIL_SENDGRID_API_KEY="Hey, that's not an API key!")
+    def test_invalid_api_key(self):
+        with self.assertRaises(AnymailAPIError) as cm:
+            self.message.send()
+        err = cm.exception
+        self.assertEqual(err.status_code, 400)
+        # Make sure the exception message includes SendGrid's response:
+        self.assertIn("authorization grant is invalid", str(err))
+
+
+@unittest.skipUnless(SENDGRID_TEST_USERNAME and SENDGRID_TEST_PASSWORD,
+                     "Set SENDGRID_TEST_USERNAME and SENDGRID_TEST_PASSWORD"
+                     "environment variables to run SendGrid integration tests")
+@override_settings(ANYMAIL_SENDGRID_USERNAME=SENDGRID_TEST_USERNAME,
+                   ANYMAIL_SENDGRID_PASSWORD=SENDGRID_TEST_PASSWORD,
+                   EMAIL_BACKEND="anymail.backends.sendgrid.SendGridBackend")
+class SendGridBackendUserPassIntegrationTests(SimpleTestCase, AnymailTestMixin):
+    """SendGrid username/password API integration tests
+
+    (See notes above for the API-key tests)
+    """
+
+    def test_valid_auth(self):
+        sent_count = send_mail('Anymail SendGrid username/password integration test',
+                               'Text content', 'from@example.com', ['to@sink.sendgrid.net'])
+        self.assertEqual(sent_count, 1)
+
+    @override_settings(ANYMAIL_SENDGRID_PASSWORD="Hey, this isn't the password!")
+    def test_invalid_auth(self):
+        with self.assertRaises(AnymailAPIError) as cm:
+            send_mail('Anymail SendGrid username/password integration test',
+                      'Text content', 'from@example.com', ['to@sink.sendgrid.net'])
+        err = cm.exception
+        self.assertEqual(err.status_code, 400)
+        # Make sure the exception message includes SendGrid's response:
+        self.assertIn("Bad username / password", str(err))