add clean django-stubs folder, add some tests

test/test-data/basic-check.test

@@ -1,9 +0,0 @@
-[case testBasicCheck]
-from typing import Any
-
-class A:
-    pass
-
-class B(A):
-    pass
-[out]

test/test-data/check-model-fields.test

@@ -0,0 +1,12 @@
+[case testBasicModelFields]
+from django.db import models
+
+
+class User(models.Model):
+    id = models.AutoField(primary_key=True)
+    name = models.CharField(max_length=255)
+
+user = User()
+reveal_type(user.id)  # E: Revealed type is 'builtins.int'
+reveal_type(user.name)  # E: Revealed type is 'builtins.str'
+[out]

test/test-data/check-postgres-fields.test

@@ -0,0 +1,13 @@
+[case testArrayField]
+import typing
+
+from django.db import models
+from django.contrib.postgres.fields import ArrayField
+
+
+class User(models.Model):
+    members = ArrayField(base_field=models.IntegerField())
+
+user = User()
+reveal_type(user.members)  # E: Revealed type is 'typing.List[int]'
+[out]

test/testdjango.py

@@ -13,6 +13,7 @@ TEST_DATA_DIR = ROOT_DIR / 'test' / 'test-data'
 
 class DjangoTestSuite(DataSuite):
     files = [
+        'check-model-fields.test',
         'check-postgres-fields.test'
     ]
     data_prefix = str(TEST_DATA_DIR)