Adds some quick testing of the IP logging during a failed login

src/paperless/tests/test_signals.py

@@ -0,0 +1,80 @@
+from django.http import HttpRequest
+from django.test import TestCase
+from paperless.signals import handle_failed_login
+
+
+class TestFailedLoginLogging(TestCase):
+    def setUp(self):
+        super().setUp()
+
+        self.creds = {
+            "username": "john lennon",
+        }
+
+    def test_none(self):
+        """
+        GIVEN:
+            - Request with no IP possible
+        WHEN:
+            - Request provided to signal handler
+        THEN:
+            - Unable to determine logged
+        """
+        request = HttpRequest()
+        request.META = {}
+        with self.assertLogs("paperless.auth") as logs:
+            handle_failed_login(None, self.creds, request)
+
+            self.assertEqual(
+                logs.output,
+                [
+                    "INFO:paperless.auth:Login failed for user `john lennon`. Unable to determine IP address.",
+                ],
+            )
+
+    def test_public(self):
+        """
+        GIVEN:
+            - Request with publicly routeable IP
+        WHEN:
+            - Request provided to signal handler
+        THEN:
+            - Expected IP is logged
+        """
+        request = HttpRequest()
+        request.META = {
+            "HTTP_X_FORWARDED_FOR": "177.139.233.139",
+        }
+        with self.assertLogs("paperless.auth") as logs:
+            handle_failed_login(None, self.creds, request)
+
+            self.assertEqual(
+                logs.output,
+                [
+                    "INFO:paperless.auth:Login failed for user `john lennon` from IP `177.139.233.139.`",
+                ],
+            )
+
+    def test_private(self):
+        """
+        GIVEN:
+            - Request with private range IP
+        WHEN:
+            - Request provided to signal handler
+        THEN:
+            - Expected IP is logged
+            - IP is noted to be a private IP
+        """
+        request = HttpRequest()
+        request.META = {
+            "HTTP_X_FORWARDED_FOR": "10.0.0.1",
+        }
+        with self.assertLogs("paperless.auth") as logs:
+            handle_failed_login(None, self.creds, request)
+
+            self.assertEqual(
+                logs.output,
+                [
+                    "INFO:paperless.auth:Login failed for user `john lennon` from private IP `10.0.0.1.`",
+                ],
+            )