add test for allowed hosts

Author: JoshFerge

tests/sentry/test_wsgi.py

@@ -42,3 +42,31 @@ def test_wsgi_init():
     subprocess.check_call(
         [sys.executable, "-c", SUBPROCESS_TEST_WGI_WARMUP],
     )
+
+
+SUBPROCESS_TEST_WGI_WARMUP_WITH_SUBDOMAIN = f"""
+import sys
+from django.conf import settings
+from sentry.runner import configure
+configure()
+settings.ALLOWED_HOSTS = [".test.com"]
+
+import sentry.wsgi
+{assert_in_sys_modules}
+import django.urls.resolvers
+from django.conf import settings
+resolver = django.urls.resolvers.get_resolver()
+assert resolver._populated is True
+for lang, _ in settings.LANGUAGES:
+    assert lang in resolver._reverse_dict
+"""
+
+
+def test_wsgi_init_with_subdomain():
+    """
+    In production, we have settings.ALLOWED_HOSTS set, so override it for this test
+    and ensure that the wsgi.py file correctly pre-loads the application it set.
+    """
+    subprocess.check_call(
+        [sys.executable, "-c", SUBPROCESS_TEST_WGI_WARMUP_WITH_SUBDOMAIN],
+    )