Reorganized text db function tests.

tests/db_functions/text/test_upper.py

@@ -0,0 +1,43 @@
+from django.db.models import CharField
+from django.db.models.functions import Upper
+from django.test import TestCase
+
+from ..models import Author
+
+
+class UpperTests(TestCase):
+
+    def test_basic(self):
+        Author.objects.create(name='John Smith', alias='smithj')
+        Author.objects.create(name='Rhonda')
+        authors = Author.objects.annotate(upper_name=Upper('name'))
+        self.assertQuerysetEqual(
+            authors.order_by('name'), [
+                'JOHN SMITH',
+                'RHONDA',
+            ],
+            lambda a: a.upper_name
+        )
+        Author.objects.update(name=Upper('name'))
+        self.assertQuerysetEqual(
+            authors.order_by('name'), [
+                ('JOHN SMITH', 'JOHN SMITH'),
+                ('RHONDA', 'RHONDA'),
+            ],
+            lambda a: (a.upper_name, a.name)
+        )
+
+    def test_transform(self):
+        try:
+            CharField.register_lookup(Upper)
+            Author.objects.create(name='John Smith', alias='smithj')
+            Author.objects.create(name='Rhonda')
+            authors = Author.objects.filter(name__upper__exact='JOHN SMITH')
+            self.assertQuerysetEqual(
+                authors.order_by('name'), [
+                    'John Smith',
+                ],
+                lambda a: a.name
+            )
+        finally:
+            CharField._unregister_lookup(Upper)