Use requests_mock for punycode domain tests

.github/workflows/test.yml

@@ -28,6 +28,7 @@ jobs:
           python -m pip install --upgrade pip
           python -m pip install --upgrade django~=${{ matrix.django-version }}
           python -m pip install --upgrade requests
+          python -m pip install --upgrade requests_mock
 
       - name: Run tests
         run: python runtests.py

linkcheck/tests/test_linkcheck.py

@@ -3,6 +3,7 @@
 from io import StringIO
 from unittest.mock import patch
 
+import requests_mock
 from django.apps import apps
 from django.conf import settings
 from django.contrib.auth.models import User
@@ -11,6 +12,7 @@
 from django.test import LiveServerTestCase, TestCase
 from django.test.utils import override_settings
 from django.urls import reverse
+from requests.exceptions import ConnectionError
 
 from linkcheck.linkcheck_settings import MAX_URL_LENGTH
 from linkcheck.listeners import (
@@ -437,15 +439,25 @@ def test_external_check_404_incomplete_cert(self):
         self.assertEqual(uv.redirect_to, '')
         self.assertEqual(uv.type, 'external')
 
-    def test_external_check_unreachable(self):
-        uv = Url(url='https://invalid')
+    @requests_mock.Mocker()
+    def test_external_check_unreachable(self, mocker):
+        exc = ConnectionError(
+            "HTTPSConnectionPool(host='name-resolution-error.example.com', port=443): Max retries exceeded with url: / "
+            "(Caused by NameResolutionError(\"<urllib3.connection.HTTPSConnection object at 0xdeadbeef>: "
+            "Failed to resolve 'name-resolution-error.example.com' ([Errno -2] Name or service not known)\"))"
+        )
+        mocked_url = 'https://name-resolution-error.example.com/'
+        mocker.register_uri('HEAD', mocked_url, exc=exc),
+        uv = Url(url=mocked_url)
         uv.check_url()
+        formatted_message = (
+            "Name Resolution Error: Failed to resolve 'name-resolution-error.example.com' "
+            "([Errno -2] Name or service not known)"
+        )
+        self.assertEqual(uv.message, formatted_message)
+        self.assertEqual(uv.get_message, formatted_message)
+        self.assertEqual(uv.error_message, formatted_message)
         self.assertEqual(uv.status, False)
-        for attr in [uv.message, uv.get_message, uv.error_message]:
-            self.assertEqual(
-                attr,
-                "Name Resolution Error: Failed to resolve 'invalid' ([Errno -2] Name or service not known)",
-            )
         self.assertEqual(uv.anchor_message, '')
         self.assertEqual(uv.ssl_status, None)
         self.assertEqual(uv.ssl_message, 'SSL certificate could not be checked')
@@ -484,27 +496,31 @@ def test_external_check_200_utf8_not_encoded(self):
         self.assertEqual(uv.redirect_to, '')
         self.assertEqual(uv.type, 'external')
 
-    def test_external_check_200_utf8_domain(self):
-        uv = Url(url='https://bafög.de/')
+    @requests_mock.Mocker()
+    def test_external_check_200_utf8_domain(self, mocker):
+        mocker.register_uri('HEAD', 'https://xn--utf8-test--z5a0txc.example.com/', reason='OK'),
+        uv = Url(url='https://utf8-test-äüö.example.com/')
         uv.check_url()
+        self.assertEqual(uv.message, '200 OK')
         self.assertEqual(uv.status, True)
-        self.assertEqual(uv.message, '302 Found')
-        self.assertEqual(uv.get_message, 'Working temporary redirect')
+        self.assertEqual(uv.get_message, 'Working external link')
         self.assertEqual(uv.error_message, '')
         self.assertEqual(uv.anchor_message, '')
         self.assertEqual(uv.ssl_status, True)
         self.assertEqual(uv.ssl_message, 'Valid SSL certificate')
-        self.assertEqual(uv.get_status_code_display(), '302 Found')
-        self.assertEqual(uv.get_redirect_status_code_display(), '200 OK')
+        self.assertEqual(uv.get_status_code_display(), '200 OK')
+        self.assertEqual(uv.get_redirect_status_code_display(), None)
+        self.assertEqual(uv.redirect_to, '')
         self.assertEqual(uv.type, 'external')
-        # The actual redirect URL might be subject to change
-        self.assertNotEqual(uv.redirect_to, '')
 
-    def test_external_check_200_punycode_domain(self):
-        uv = Url(url='https://www.xn--jobbrse-stellenangebote-blc.de/')
+    @requests_mock.Mocker()
+    def test_external_check_200_punycode_domain(self, mocker):
+        punycode_domain = 'https://xn--utf8-test--z5a0txc.example.com/'
+        mocker.register_uri('HEAD', punycode_domain, reason='OK'),
+        uv = Url(url=punycode_domain)
         uv.check_url()
-        self.assertEqual(uv.status, True)
         self.assertEqual(uv.message, '200 OK')
+        self.assertEqual(uv.status, True)
         self.assertEqual(uv.get_message, 'Working external link')
         self.assertEqual(uv.error_message, '')
         self.assertEqual(uv.anchor_message, '')

pyproject.toml

@@ -53,6 +53,7 @@ dev = [
     "flake8",
     "isort",
     "pre-commit",
+    "requests_mock",
 ]
 
 [tool.setuptools]