Render breadcrumbs in page usage view

wagtail/admin/tests/pages/test_page_usage.py

@@ -8,9 +8,13 @@
     SimplePage,
 )
 from wagtail.test.utils import WagtailTestUtils
+from wagtail.test.utils.template_tests import AdminTemplateTestUtils
 
 
-class TestPageUsage(WagtailTestUtils, TestCase):
+class TestPageUsage(AdminTemplateTestUtils, WagtailTestUtils, TestCase):
+    # We don't show the "Home" breadcrumb item in page views
+    base_breadcrumb_items = []
+
     def setUp(self):
         self.user = self.login()
         self.root_page = Page.objects.get(id=2)
@@ -24,7 +28,7 @@ def setUp(self):
         page.save_revision().publish()
         self.page = SimplePage.objects.get(id=page.id)
 
-    def test_no_usage(self):
+    def test_simple(self):
         usage_url = reverse("wagtailadmin_pages:usage", args=(self.page.id,))
         response = self.client.get(usage_url)
 
@@ -33,6 +37,27 @@ def test_no_usage(self):
         self.assertContains(response, "Usage")
         self.assertContains(response, "Hello world!")
 
+        items = [
+            {
+                "url": reverse("wagtailadmin_explore_root"),
+                "label": "Root",
+            },
+            {
+                "url": reverse("wagtailadmin_explore", args=(self.root_page.id,)),
+                "label": "Welcome to your new Wagtail site!",
+            },
+            {
+                "url": reverse("wagtailadmin_explore", args=(self.page.id,)),
+                "label": "Hello world! (simple page)",
+            },
+            {
+                "url": "",
+                "label": "Usage",
+                "sublabel": "Hello world! (simple page)",
+            },
+        ]
+        self.assertBreadcrumbsItemsRendered(items, response.content)
+
     def test_has_private_usage(self):
         PageChooserModel.objects.create(page=self.page)
         usage_url = reverse("wagtailadmin_pages:usage", args=(self.page.id,))

wagtail/admin/views/pages/usage.py

@@ -4,6 +4,7 @@
 from django.core.exceptions import PermissionDenied
 from django.http import Http404
 from django.urls import reverse
+from django.utils.functional import cached_property
 from django.utils.translation import gettext_lazy as _
 
 from wagtail.admin.ui.tables import Column, DateColumn
@@ -15,6 +16,7 @@
 )
 from wagtail.admin.views import generic
 from wagtail.admin.views.generic.base import BaseListingView
+from wagtail.admin.views.pages.utils import get_breadcrumbs_items_for_page
 from wagtail.models import Page
 
 
@@ -76,8 +78,13 @@ class UsageView(generic.UsageView):
     pk_url_kwarg = "page_id"
     header_icon = "doc-empty-inverse"
     usage_url_name = "wagtailadmin_pages:usage"
+    _show_breadcrumbs = True
 
     def dispatch(self, request, *args, **kwargs):
         if not self.object.permissions_for_user(request.user).can_edit():
             raise PermissionDenied
         return super().dispatch(request, *args, **kwargs)
+
+    @cached_property
+    def breadcrumbs_items(self):
+        return get_breadcrumbs_items_for_page(self.object, self.request.user)