✅ [#4930] Add test for export view

src/openforms/forms/templates/admin/forms/formstatistics/export_form.html

@@ -26,7 +26,7 @@
 <h1>{% trans 'Export submission statistics' %}</h1>
 
 <div id="content-main">
-    <form action="." method="post">
+    <form action="." method="post" id="export-statistics">
         {% csrf_token %}
 
         <fieldset class="module aligned">

src/openforms/forms/tests/admin/test_form_statistics.py

@@ -2,9 +2,15 @@
 from django.utils.translation import gettext as _
 
 from django_webtest import WebTest
+from freezegun import freeze_time
 from maykin_2fa.test import disable_admin_mfa
 
 from openforms.accounts.tests.factories import UserFactory
+from openforms.logging import logevent
+from openforms.registrations.contrib.demo.plugin import DemoRegistration
+from openforms.submissions.tests.factories import SubmissionFactory
+
+from ...forms import ExportStatisticsForm
 
 
 @disable_admin_mfa()
@@ -57,3 +63,37 @@ def test_navigate_from_changelist(self):
         export_page = changelist.click(_("Export submission statistics"))
 
         self.assertEqual(export_page.request.path, self.admin_url)
+
+    def test_successful_export_downloads_file(self):
+        user = UserFactory.create(
+            is_staff=True,
+            user_permissions=["forms.view_formstatistics"],
+        )
+        # create some log records for submissions
+        with freeze_time("2024-12-20T16:44:00+01:00"):
+            sub1, sub2, sub3 = SubmissionFactory.create_batch(
+                3, registration_success=True
+            )
+            plugin = DemoRegistration("demo")
+            logevent.registration_success(sub1, plugin=plugin)
+            logevent.registration_success(sub2, plugin=plugin)
+            logevent.registration_success(sub3, plugin=plugin)
+
+        export_page = self.app.get(self.admin_url, user=user)
+        form = export_page.forms["export-statistics"]
+
+        # fill out the form and submit it
+        form["start_date"] = "2024-12-01"
+        form["end_date"] = "2025-01-01"
+        response = form.submit()
+
+        self.assertEqual(response.status_code, 200)
+        self.assertEqual(
+            response.content_type,
+            "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet",
+        )
+        self.assertGreater(int(response["Content-Length"]), 0)
+        self.assertEqual(
+            response["Content-Disposition"],
+            'attachment; filename="submissions_2024-12-01_2025-01-01.xlsx"',
+        )