Display 500 error page for POST requests

mesads/app/test_views.py

@@ -11,6 +11,7 @@
 
 from freezegun import freeze_time
 
+from mesads.app.views import HTTP500View
 from mesads.fradm.models import Commune, EPCI, Prefecture
 
 from .models import (
@@ -24,6 +25,18 @@
 from .views import DashboardsView, DashboardsDetailView
 
 
+class TestHTTP500View(ClientTestCase):
+    def test_500(self):
+        request = RequestFactory().get("/500")
+        response = HTTP500View.as_view()(request)
+        self.assertEqual(response.status_code, 200)
+
+        # POST requests should be allowed
+        request = RequestFactory().post("/500")
+        response = HTTP500View.as_view()(request)
+        self.assertEqual(response.status_code, 200)
+
+
 class TestHomepageView(ClientTestCase):
     def test_200(self):
         resp = self.anonymous_client.get("/")

mesads/app/views.py

@@ -63,6 +63,11 @@ class HTTP500View(TemplateView):
 
     template_name = "500.html"
 
+    def dispatch(self, request, *args, **kwargs):
+        """The base class TemplateView only accepts GET requests. By overriding
+        dispatch, we return the error page for any other method."""
+        return super().get(request, *args, **kwargs)
+
 
 class HomepageView(TemplateView):
     template_name = "pages/homepage.html"