added test case

src/registrar/templates/domain_base.html

@@ -16,12 +16,23 @@
   </div>
   <div class="grid-row grid-gap">
     <div class="tablet:grid-col-3">
+      {% if domain.domain_info %}
         {% include 'domain_sidebar.html' %}
+      {% endif %}
     </div>
 
     <div class="tablet:grid-col-9">
       <main id="main-content" class="grid-container">
-
+      {% if not domain.domain_info %}
+        <div class="usa-alert usa-alert--error margin-bottom-2">
+          <div class="usa-alert__body">
+            <h4 class="usa-alert__heading larger-font-sizing">Error!</h4>
+            <p class="usa-alert__text ">
+              You are attempting to manage a domain, {{ domain.name }}, which does not have a Domain Information object. Please correct this in the admin.
+            </p>
+          </div>
+        </div>
+      {% else %}
         {% if is_analyst_or_superuser and analyst_action == 'edit' and analyst_action_location == domain.pk %}
         <div class="usa-alert usa-alert--warning margin-bottom-2">
           <div class="usa-alert__body">
@@ -58,7 +69,7 @@
         <h1 class="break-word">{{ domain.name }}</h1>
 
         {% endblock %}  {# domain_content #}
-
+      {% endif %}
       </main>
     </div>
   </div>

src/registrar/tests/common.py

@@ -453,7 +453,7 @@ def create_user():
     p = "userpass"
     user = User.objects.create_user(
         username="staffuser",
-        email="user@example.com",
+        email="staff@example.com",
         is_staff=True,
         password=p,
     )

src/registrar/tests/test_views.py

@@ -5,7 +5,7 @@ from django.conf import settings
 from django.test import Client, TestCase
 from django.urls import reverse
 from django.contrib.auth import get_user_model
-from .common import MockEppLib, completed_application  # type: ignore
+from .common import MockEppLib, completed_application, create_user  # type: ignore
 
 from django_webtest import WebTest  # type: ignore
 import boto3_mocking  # type: ignore
@@ -1282,13 +1282,27 @@ class TestDomainOverview(TestWithDomainPermissions, WebTest):
         self.assertContains(detail_page, "2.3.4.5)")
 
     def test_domain_with_no_information_or_application(self):
-        """Test that domain management page returns 200 when no
+        """Test that domain management page returns 200 and displays error
-        domain information or domain application exist"""
+        when no domain information or domain application exist"""
-        detail_page = self.app.get(
+        # have to use staff user for this test
+        staff_user = create_user()
+        # staff_user.save()
+        self.client.force_login(staff_user)
+
+        # need to set the analyst_action and analyst_action_location
+        # in the session to emulate user clicking Manage Domain
+        # in the admin interface
+        session = self.client.session
+        session['analyst_action'] = 'foo'
+        session['analyst_action_location'] = self.domain_no_information.id
+        session.save()
+
+        detail_page = self.client.get(
             reverse("domain", kwargs={"pk": self.domain_no_information.id})
         )
 
         self.assertContains(detail_page, "noinformation.gov")
+        self.assertContains(detail_page, "Error")
 
 
 class TestDomainManagers(TestDomainOverview):