Refs #32339 -- Added use_fieldset to Widget.

tests/forms_tests/widget_tests/test_multiwidget.py

@@ -4,6 +4,7 @@ from datetime import datetime
 from django.forms import (
     CharField,
     FileInput,
+    Form,
     MultipleChoiceField,
     MultiValueField,
     MultiWidget,
@@ -51,7 +52,9 @@ class ComplexField(MultiValueField):
             MultipleChoiceField(choices=WidgetTest.beatles),
             SplitDateTimeField(),
         )
-        super().__init__(fields, required, widget, label, initial)
+        super().__init__(
+            fields, required=required, widget=widget, label=label, initial=initial
+        )
 
     def compress(self, data_list):
         if data_list:
@@ -296,3 +299,22 @@ class MultiWidgetTest(WidgetTest):
         # w2 ought to be independent of w1, since MultiWidget ought
         # to make a copy of its sub-widgets when it is copied.
         self.assertEqual(w1.choices, [1, 2, 3])
+
+    def test_fieldset(self):
+        class TestForm(Form):
+            template_name = "forms_tests/use_fieldset.html"
+            field = ComplexField(widget=ComplexMultiWidget)
+
+        form = TestForm()
+        self.assertIs(form["field"].field.widget.use_fieldset, True)
+        self.assertHTMLEqual(
+            "<div><fieldset><legend>Field:</legend>"
+            '<input type="text" name="field_0" required id="id_field_0">'
+            '<select name="field_1" required id="id_field_1" multiple>'
+            '<option value="J">John</option><option value="P">Paul</option>'
+            '<option value="G">George</option><option value="R">Ringo</option></select>'
+            '<input type="text" name="field_2_0" required id="id_field_2_0">'
+            '<input type="text" name="field_2_1" required id="id_field_2_1">'
+            "</fieldset></div>",
+            form.render(),
+        )