Fixed #34305 -- Changed GeoIP2 tests to use MaxMind test databases.

GEOIP_SETTINGS is removed from the global scope as this prevents
modifications to the settings using @override_settings in tests.

Additional improvements now that we have stable test databases include:

- Made testing more comprehensive and improved coverage
- Patched socket.gethostbyname() for whole test case
- Added testing of non-free GeoIP2 databases

Co-authored-by: Tom Forbes <tom@tomforb.es>

9 files changed, 159 insertions, 129 deletions

diff --git a/django/contrib/gis/geoip2.py b/django/contrib/gis/geoip2.py
index 898f5d596d..5f49954209 100644
--- a/django/contrib/gis/geoip2.py
+++ b/django/contrib/gis/geoip2.py
@@ -25,19 +25,12 @@ __all__ = ["HAS_GEOIP2"]
 
 try:
     import geoip2.database
-except ImportError:
+except ImportError:  # pragma: no cover
     HAS_GEOIP2 = False
 else:
     HAS_GEOIP2 = True
     __all__ += ["GeoIP2", "GeoIP2Exception"]
 
-# Creating the settings dictionary with any settings, if needed.
-GEOIP_SETTINGS = {
-    "GEOIP_PATH": getattr(settings, "GEOIP_PATH", None),
-    "GEOIP_CITY": getattr(settings, "GEOIP_CITY", "GeoLite2-City.mmdb"),
-    "GEOIP_COUNTRY": getattr(settings, "GEOIP_COUNTRY", "GeoLite2-Country.mmdb"),
-}
-
 
 class GeoIP2Exception(Exception):
     pass
@@ -95,7 +88,7 @@ class GeoIP2:
             raise GeoIP2Exception("Invalid GeoIP caching option: %s" % cache)
 
         # Getting the GeoIP data path.
-        path = path or GEOIP_SETTINGS["GEOIP_PATH"]
+        path = path or getattr(settings, "GEOIP_PATH", None)
         if not path:
             raise GeoIP2Exception(
                 "GeoIP path must be provided via parameter or the GEOIP_PATH setting."
@@ -106,12 +99,16 @@ class GeoIP2:
             # Constructing the GeoIP database filenames using the settings
             # dictionary. If the database files for the GeoLite country
             # and/or city datasets exist, then try to open them.
-            country_db = path / (country or GEOIP_SETTINGS["GEOIP_COUNTRY"])
+            country_db = path / (
+                country or getattr(settings, "GEOIP_COUNTRY", "GeoLite2-Country.mmdb")
+            )
             if country_db.is_file():
                 self._country = geoip2.database.Reader(str(country_db), mode=cache)
                 self._country_file = country_db
 
-            city_db = path / (city or GEOIP_SETTINGS["GEOIP_CITY"])
+            city_db = path / (
+                city or getattr(settings, "GEOIP_CITY", "GeoLite2-City.mmdb")
+            )
             if city_db.is_file():
                 self._city = geoip2.database.Reader(str(city_db), mode=cache)
                 self._city_file = city_db
diff --git a/tests/gis_tests/data/geoip2/GeoIP2-City-Test.mmdb b/tests/gis_tests/data/geoip2/GeoIP2-City-Test.mmdb
new file mode 100644
index 0000000000..3197ef122f
--- /dev/null
+++ b/tests/gis_tests/data/geoip2/GeoIP2-City-Test.mmdb
diff --git a/tests/gis_tests/data/geoip2/GeoIP2-Country-Test.mmdb b/tests/gis_tests/data/geoip2/GeoIP2-Country-Test.mmdb
new file mode 100644
index 0000000000..d79c9933bb
--- /dev/null
+++ b/tests/gis_tests/data/geoip2/GeoIP2-Country-Test.mmdb
diff --git a/tests/gis_tests/data/geoip2/GeoLite2-ASN-Test.mmdb b/tests/gis_tests/data/geoip2/GeoLite2-ASN-Test.mmdb
new file mode 100644
index 0000000000..afa7e956e4
--- /dev/null
+++ b/tests/gis_tests/data/geoip2/GeoLite2-ASN-Test.mmdb
diff --git a/tests/gis_tests/data/geoip2/GeoLite2-City-Test.mmdb b/tests/gis_tests/data/geoip2/GeoLite2-City-Test.mmdb
new file mode 100644
index 0000000000..028a6984d9
--- /dev/null
+++ b/tests/gis_tests/data/geoip2/GeoLite2-City-Test.mmdb
diff --git a/tests/gis_tests/data/geoip2/GeoLite2-Country-Test.mmdb b/tests/gis_tests/data/geoip2/GeoLite2-Country-Test.mmdb
new file mode 100644
index 0000000000..a2cbb08316
--- /dev/null
+++ b/tests/gis_tests/data/geoip2/GeoLite2-Country-Test.mmdb
diff --git a/tests/gis_tests/data/geoip2/LICENSE b/tests/gis_tests/data/geoip2/LICENSE
new file mode 100644
index 0000000000..f86abbd73e
--- /dev/null
+++ b/tests/gis_tests/data/geoip2/LICENSE
@@ -0,0 +1,4 @@
+This work is licensed under the Creative Commons Attribution-ShareAlike 3.0
+Unported License. To view a copy of this license, visit
+http://creativecommons.org/licenses/by-sa/3.0/ or send a letter to Creative
+Commons, 444 Castro Street, Suite 900, Mountain View, California, 94041, USA.
diff --git a/tests/gis_tests/data/geoip2/README b/tests/gis_tests/data/geoip2/README
new file mode 100644
index 0000000000..b6a21720a3
--- /dev/null
+++ b/tests/gis_tests/data/geoip2/README
@@ -0,0 +1,3 @@
+These test databases are taken from the following repository:
+
+https://github.com/maxmind/MaxMind-DB/
diff --git a/tests/gis_tests/test_geoip2.py b/tests/gis_tests/test_geoip2.py
index acdfde9ec7..9cd5ffbdfe 100644
--- a/tests/gis_tests/test_geoip2.py
+++ b/tests/gis_tests/test_geoip2.py
@@ -1,50 +1,59 @@
-import os
+import itertools
 import pathlib
 from unittest import mock, skipUnless
 
 from django.conf import settings
 from django.contrib.gis.geoip2 import HAS_GEOIP2
 from django.contrib.gis.geos import GEOSGeometry
-from django.test import SimpleTestCase
+from django.test import SimpleTestCase, override_settings
 from django.utils.deprecation import RemovedInDjango60Warning
 
 if HAS_GEOIP2:
+    import geoip2
+
     from django.contrib.gis.geoip2 import GeoIP2, GeoIP2Exception
 
 
-# Note: Requires both the GeoIP country and city datasets.
-# The GEOIP_DATA path should be the only setting set (the directory
-# should contain links or the actual database files 'GeoLite2-City.mmdb' and
-# 'GeoLite2-City.mmdb'.
-@skipUnless(
-    HAS_GEOIP2 and getattr(settings, "GEOIP_PATH", None),
-    "GeoIP is required along with the GEOIP_PATH setting.",
+def build_geoip_path(*parts):
+    return pathlib.Path(__file__).parent.joinpath("data/geoip2", *parts).resolve()
+
+
+@skipUnless(HAS_GEOIP2, "GeoIP2 is required.")
+@override_settings(
+    GEOIP_CITY="GeoLite2-City-Test.mmdb",
+    GEOIP_COUNTRY="GeoLite2-Country-Test.mmdb",
 )
-class GeoIPTest(SimpleTestCase):
-    addr = "129.237.192.1"
-    fqdn = "ku.edu"
+class GeoLite2Test(SimpleTestCase):
+    fqdn = "sky.uk"
+    ipv4 = "2.125.160.216"
+    ipv6 = "::ffff:027d:a0d8"
+
+    @classmethod
+    def setUpClass(cls):
+        # Avoid referencing __file__ at module level.
+        cls.enterClassContext(override_settings(GEOIP_PATH=build_geoip_path()))
+        # Always mock host lookup to avoid test breakage if DNS changes.
+        cls.enterClassContext(mock.patch("socket.gethostbyname", return_value=cls.ipv4))
 
-    def test01_init(self):
-        "GeoIP initialization."
-        g1 = GeoIP2()  # Everything inferred from GeoIP path
-        path = settings.GEOIP_PATH
-        g2 = GeoIP2(path, 0)  # Passing in data path explicitly.
-        # path accepts str and pathlib.Path.
-        if isinstance(path, str):
-            g3 = GeoIP2(pathlib.Path(path))
-        else:
-            g3 = GeoIP2(str(path))
+        super().setUpClass()
 
+    def test_init(self):
+        # Everything inferred from GeoIP path.
+        g1 = GeoIP2()
+        # Path passed explicitly.
+        g2 = GeoIP2(settings.GEOIP_PATH, GeoIP2.MODE_AUTO)
+        # Path provided as a string.
+        g3 = GeoIP2(str(settings.GEOIP_PATH))
         for g in (g1, g2, g3):
             self.assertTrue(g._country)
             self.assertTrue(g._city)
 
         # Only passing in the location of one database.
-        city = os.path.join(path, "GeoLite2-City.mmdb")
-        cntry = os.path.join(path, "GeoLite2-Country.mmdb")
-        g4 = GeoIP2(city, country="")
+        g4 = GeoIP2(settings.GEOIP_PATH / settings.GEOIP_CITY, country="")
+        self.assertTrue(g4._city)
         self.assertIsNone(g4._country)
-        g5 = GeoIP2(cntry, city="")
+        g5 = GeoIP2(settings.GEOIP_PATH / settings.GEOIP_COUNTRY, city="")
+        self.assertTrue(g5._country)
         self.assertIsNone(g5._city)
 
         # Improper parameters.
@@ -57,99 +66,96 @@ class GeoIPTest(SimpleTestCase):
             else:
                 e = TypeError
             with self.assertRaises(e):
-                GeoIP2(bad, 0)
+                GeoIP2(bad, GeoIP2.MODE_AUTO)
 
     def test_no_database_file(self):
-        invalid_path = os.path.join(os.path.dirname(__file__), "data")
-        msg = "Could not load a database from %s." % invalid_path
+        invalid_path = pathlib.Path(__file__).parent.joinpath("data/invalid").resolve()
+        msg = f"Could not load a database from {invalid_path}."
         with self.assertRaisesMessage(GeoIP2Exception, msg):
             GeoIP2(invalid_path)
 
-    def test02_bad_query(self):
-        "GeoIP query parameter checking."
-        cntry_g = GeoIP2(city="<foo>")
-        # No city database available, these calls should fail.
-        with self.assertRaises(GeoIP2Exception):
-            cntry_g.city("tmc.edu")
+    def test_bad_query(self):
+        g = GeoIP2(city="<invalid>")
 
-        # Non-string query should raise TypeError
-        with self.assertRaises(TypeError):
-            cntry_g.country_code(17)
-        with self.assertRaises(TypeError):
-            cntry_g.country_name(GeoIP2)
+        functions = (g.city, g.geos, g.lat_lon, g.lon_lat)
+        msg = "Invalid GeoIP city data file: "
+        for function in functions:
+            with self.subTest(function=function.__qualname__):
+                with self.assertRaisesMessage(GeoIP2Exception, msg):
+                    function("example.com")
 
-    @mock.patch("socket.gethostbyname")
-    def test03_country(self, gethostbyname):
-        "GeoIP country querying methods."
-        gethostbyname.return_value = "128.249.1.1"
-        g = GeoIP2(city="<foo>")
+        functions += (g.country, g.country_code, g.country_name)
+        values = (123, 123.45, b"", (), [], {}, set(), frozenset(), GeoIP2)
+        msg = "GeoIP query must be a string, not type"
+        for function, value in itertools.product(functions, values):
+            with self.subTest(function=function.__qualname__, type=type(value)):
+                with self.assertRaisesMessage(TypeError, msg):
+                    function(value)
 
-        for query in (self.fqdn, self.addr):
-            self.assertEqual(
-                "US",
-                g.country_code(query),
-                "Failed for func country_code and query %s" % query,
-            )
-            self.assertEqual(
-                "United States",
-                g.country_name(query),
-                "Failed for func country_name and query %s" % query,
-            )
-            self.assertEqual(
-                {"country_code": "US", "country_name": "United States"},
-                g.country(query),
-            )
+    def test_country(self):
+        g = GeoIP2(city="<invalid>")
+        for query in (self.fqdn, self.ipv4, self.ipv6):
+            with self.subTest(query=query):
+                self.assertEqual(
+                    g.country(query),
+                    {
+                        "country_code": "GB",
+                        "country_name": "United Kingdom",
+                    },
+                )
+                self.assertEqual(g.country_code(query), "GB")
+                self.assertEqual(g.country_name(query), "United Kingdom")
 
-    @mock.patch("socket.gethostbyname")
-    def test04_city(self, gethostbyname):
-        "GeoIP city querying methods."
-        gethostbyname.return_value = "129.237.192.1"
-        g = GeoIP2(country="<foo>")
+    def test_city(self):
+        g = GeoIP2(country="<invalid>")
+        for query in (self.fqdn, self.ipv4, self.ipv6):
+            with self.subTest(query=query):
+                self.assertEqual(
+                    g.city(query),
+                    {
+                        "city": "Boxford",
+                        "continent_code": "EU",
+                        "continent_name": "Europe",
+                        "country_code": "GB",
+                        "country_name": "United Kingdom",
+                        "dma_code": None,
+                        "is_in_european_union": False,
+                        "latitude": 51.75,
+                        "longitude": -1.25,
+                        "postal_code": "OX1",
+                        "region": "ENG",
+                        "time_zone": "Europe/London",
+                    },
+                )
 
-        for query in (self.fqdn, self.addr):
-            # Country queries should still work.
-            self.assertEqual(
-                "US",
-                g.country_code(query),
-                "Failed for func country_code and query %s" % query,
-            )
-            self.assertEqual(
-                "United States",
-                g.country_name(query),
-                "Failed for func country_name and query %s" % query,
-            )
-            self.assertEqual(
-                {"country_code": "US", "country_name": "United States"},
-                g.country(query),
-            )
+                geom = g.geos(query)
+                self.assertIsInstance(geom, GEOSGeometry)
+                self.assertEqual(geom.srid, 4326)
+                self.assertEqual(geom.tuple, (-1.25, 51.75))
 
-            # City information dictionary.
-            d = g.city(query)
-            self.assertEqual("NA", d["continent_code"])
-            self.assertEqual("North America", d["continent_name"])
-            self.assertEqual("US", d["country_code"])
-            self.assertEqual("Lawrence", d["city"])
-            self.assertEqual("KS", d["region"])
-            self.assertEqual("America/Chicago", d["time_zone"])
-            self.assertFalse(d["is_in_european_union"])
-            geom = g.geos(query)
-            self.assertIsInstance(geom, GEOSGeometry)
+                self.assertEqual(g.lat_lon(query), (51.75, -1.25))
+                self.assertEqual(g.lon_lat(query), (-1.25, 51.75))
+                # Country queries should still work.
+                self.assertEqual(
+                    g.country(query),
+                    {
+                        "country_code": "GB",
+                        "country_name": "United Kingdom",
+                    },
+                )
+                self.assertEqual(g.country_code(query), "GB")
+                self.assertEqual(g.country_name(query), "United Kingdom")
 
-            for e1, e2 in (
-                geom.tuple,
-                g.lon_lat(query),
-                g.lat_lon(query),
-            ):
-                self.assertIsInstance(e1, float)
-                self.assertIsInstance(e2, float)
-
-    def test06_ipv6_query(self):
-        "GeoIP can lookup IPv6 addresses."
-        g = GeoIP2()
-        d = g.city("2002:81ed:c9a5::81ed:c9a5")  # IPv6 address for www.nhm.ku.edu
-        self.assertEqual("US", d["country_code"])
-        self.assertEqual("Lawrence", d["city"])
-        self.assertEqual("KS", d["region"])
+    def test_not_found(self):
+        g1 = GeoIP2(city="<invalid>")
+        g2 = GeoIP2(country="<invalid>")
+        for function, query in itertools.product(
+            (g1.country, g2.city), ("127.0.0.1", "::1")
+        ):
+            with self.subTest(function=function.__qualname__, query=query):
+                msg = f"The address {query} is not in the database."
+                with self.assertRaisesMessage(geoip2.errors.AddressNotFoundError, msg):
+                    function(query)
 
     def test_del(self):
         g = GeoIP2()
@@ -162,8 +168,7 @@ class GeoIPTest(SimpleTestCase):
         self.assertIs(country._db_reader.closed, True)
 
     def test_repr(self):
-        path = settings.GEOIP_PATH
-        g = GeoIP2(path=path)
+        g = GeoIP2()
         meta = g._reader.metadata()
         version = "%s.%s" % (
             meta.binary_format_major_version,
@@ -181,26 +186,47 @@ class GeoIPTest(SimpleTestCase):
         )
         self.assertEqual(repr(g), expected)
 
-    @mock.patch("socket.gethostbyname", return_value="expected")
-    def test_check_query(self, gethostbyname):
+    def test_check_query(self):
         g = GeoIP2()
-        self.assertEqual(g._check_query("127.0.0.1"), "127.0.0.1")
-        self.assertEqual(
-            g._check_query("2002:81ed:c9a5::81ed:c9a5"), "2002:81ed:c9a5::81ed:c9a5"
-        )
-        self.assertEqual(g._check_query("invalid-ip-address"), "expected")
+        self.assertEqual(g._check_query(self.ipv4), self.ipv4)
+        self.assertEqual(g._check_query(self.ipv6), self.ipv6)
+        self.assertEqual(g._check_query(self.fqdn), self.ipv4)
 
     def test_coords_deprecation_warning(self):
         g = GeoIP2()
         msg = "GeoIP2.coords() is deprecated. Use GeoIP2.lon_lat() instead."
         with self.assertWarnsMessage(RemovedInDjango60Warning, msg):
-            e1, e2 = g.coords(self.fqdn)
+            e1, e2 = g.coords(self.ipv4)
         self.assertIsInstance(e1, float)
         self.assertIsInstance(e2, float)
 
     def test_open_deprecation_warning(self):
         msg = "GeoIP2.open() is deprecated. Use GeoIP2() instead."
         with self.assertWarnsMessage(RemovedInDjango60Warning, msg):
-            g = GeoIP2.open(settings.GEOIP_PATH, 0)
+            g = GeoIP2.open(settings.GEOIP_PATH, GeoIP2.MODE_AUTO)
         self.assertTrue(g._country)
         self.assertTrue(g._city)
+
+
+@skipUnless(HAS_GEOIP2, "GeoIP2 is required.")
+@override_settings(
+    GEOIP_CITY="GeoIP2-City-Test.mmdb",
+    GEOIP_COUNTRY="GeoIP2-Country-Test.mmdb",
+)
+class GeoIP2Test(GeoLite2Test):
+    """Non-free GeoIP2 databases are supported."""
+
+
+@skipUnless(HAS_GEOIP2, "GeoIP2 is required.")
+class ErrorTest(SimpleTestCase):
+    def test_missing_path(self):
+        msg = "GeoIP path must be provided via parameter or the GEOIP_PATH setting."
+        with self.settings(GEOIP_PATH=None):
+            with self.assertRaisesMessage(GeoIP2Exception, msg):
+                GeoIP2()
+
+    def test_unsupported_database(self):
+        msg = "Unable to recognize database edition: GeoLite2-ASN"
+        with self.settings(GEOIP_PATH=build_geoip_path("GeoLite2-ASN-Test.mmdb")):
+            with self.assertRaisesMessage(GeoIP2Exception, msg):
+                GeoIP2()