Refs #11964 -- Made Q objects deconstructible.

tests/queries/test_q.py

@@ -0,0 +1,76 @@
+from django.db.models import F, Q
+from django.test import SimpleTestCase
+
+
+class QTests(SimpleTestCase):
+    def test_deconstruct(self):
+        q = Q(price__gt=F('discounted_price'))
+        path, args, kwargs = q.deconstruct()
+        self.assertEqual(path, 'django.db.models.query_utils.Q')
+        self.assertEqual(args, ())
+        self.assertEqual(kwargs, {'price__gt': F('discounted_price')})
+
+    def test_deconstruct_negated(self):
+        q = ~Q(price__gt=F('discounted_price'))
+        path, args, kwargs = q.deconstruct()
+        self.assertEqual(path, 'django.db.models.query_utils.Q')
+        self.assertEqual(args, ())
+        self.assertEqual(kwargs, {
+            'price__gt': F('discounted_price'),
+            '_negated': True,
+        })
+
+    def test_deconstruct_or(self):
+        q1 = Q(price__gt=F('discounted_price'))
+        q2 = Q(price=F('discounted_price'))
+        q = q1 | q2
+        path, args, kwargs = q.deconstruct()
+        self.assertEqual(path, 'django.db.models.query_utils.Q')
+        self.assertEqual(args, (
+            ('price__gt', F('discounted_price')),
+            ('price', F('discounted_price')),
+        ))
+        self.assertEqual(kwargs, {'_connector': 'OR'})
+
+    def test_deconstruct_and(self):
+        q1 = Q(price__gt=F('discounted_price'))
+        q2 = Q(price=F('discounted_price'))
+        q = q1 & q2
+        path, args, kwargs = q.deconstruct()
+        self.assertEqual(path, 'django.db.models.query_utils.Q')
+        self.assertEqual(args, (
+            ('price__gt', F('discounted_price')),
+            ('price', F('discounted_price')),
+        ))
+        self.assertEqual(kwargs, {'_connector': 'AND'})
+
+    def test_deconstruct_nested(self):
+        q = Q(Q(price__gt=F('discounted_price')))
+        path, args, kwargs = q.deconstruct()
+        self.assertEqual(path, 'django.db.models.query_utils.Q')
+        self.assertEqual(args, (Q(price__gt=F('discounted_price')),))
+        self.assertEqual(kwargs, {'_connector': 'AND'})
+
+    def test_reconstruct(self):
+        q = Q(price__gt=F('discounted_price'))
+        path, args, kwargs = q.deconstruct()
+        self.assertEqual(Q(*args, **kwargs), q)
+
+    def test_reconstruct_negated(self):
+        q = ~Q(price__gt=F('discounted_price'))
+        path, args, kwargs = q.deconstruct()
+        self.assertEqual(Q(*args, **kwargs), q)
+
+    def test_reconstruct_or(self):
+        q1 = Q(price__gt=F('discounted_price'))
+        q2 = Q(price=F('discounted_price'))
+        q = q1 | q2
+        path, args, kwargs = q.deconstruct()
+        self.assertEqual(Q(*args, **kwargs), q)
+
+    def test_reconstruct_and(self):
+        q1 = Q(price__gt=F('discounted_price'))
+        q2 = Q(price=F('discounted_price'))
+        q = q1 & q2
+        path, args, kwargs = q.deconstruct()
+        self.assertEqual(Q(*args, **kwargs), q)