Added test for django.contrib.admin.utils.help_text_for_field().

tests/admin_utils/models.py

@@ -15,7 +15,11 @@ class Article(models.Model):
     """
     site = models.ForeignKey(Site, models.CASCADE, related_name="admin_articles")
     title = models.CharField(max_length=100)
-    hist = models.CharField(max_length=100, verbose_name=_("History"))
+    hist = models.CharField(
+        max_length=100,
+        verbose_name=_('History'),
+        help_text=_('History help text'),
+    )
     created = models.DateTimeField(null=True)
 
     def __str__(self):

tests/admin_utils/tests.py

@@ -6,7 +6,8 @@ from django.conf import settings
 from django.contrib.admin import helpers
 from django.contrib.admin.utils import (
     NestedObjects, display_for_field, display_for_value, flatten,
-    flatten_fieldsets, label_for_field, lookup_field, quote,
+    flatten_fieldsets, help_text_for_field, label_for_field, lookup_field,
+    quote,
 )
 from django.db import DEFAULT_DB_ALIAS, models
 from django.test import SimpleTestCase, TestCase, override_settings
@@ -334,6 +335,16 @@ class UtilsTests(SimpleTestCase):
             'property short description'
         )
 
+    def test_help_text_for_field(self):
+        tests = [
+            ('article', ''),
+            ('unknown', ''),
+            ('hist', 'History help text'),
+        ]
+        for name, help_text in tests:
+            with self.subTest(name=name):
+                self.assertEqual(help_text_for_field(name, Article), help_text)
+
     def test_related_name(self):
         """
         Regression test for #13963