[1.7.x] Fixed #22537 -- Add tests and improved docs for field subclass with choices.

Backport of 7fd1b35ed7 from master

1 files changed, 11 insertions, 1 deletions

diff --git a/tests/field_subclassing/models.py b/tests/field_subclassing/models.py
index c2f7e4f66b..3ed465cd7f 100644
--- a/tests/field_subclassing/models.py
+++ b/tests/field_subclassing/models.py
@@ -5,7 +5,7 @@ Tests for field subclassing.
 from django.db import models
 from django.utils.encoding import force_text
 
-from .fields import SmallField, SmallerField, JSONField
+from .fields import Small, SmallField, SmallerField, JSONField
 from django.utils.encoding import python_2_unicode_compatible
 
 
@@ -22,5 +22,15 @@ class OtherModel(models.Model):
     data = SmallerField()
 
 
+class ChoicesModel(models.Model):
+    SMALL_AB = Small('a', 'b')
+    SMALL_CD = Small('c', 'd')
+    SMALL_CHOICES = (
+        (SMALL_AB, str(SMALL_AB)),
+        (SMALL_CD, str(SMALL_CD)),
+    )
+    data = SmallField('small field', choices=SMALL_CHOICES)
+
+
 class DataModel(models.Model):
     data = JSONField()