add whole new app for balance prediction, replace uwsgi, update everything

core/tests/test_price_field.py

@@ -0,0 +1,47 @@
+from decimal import Decimal, InvalidOperation
+
+from django.test import TestCase
+from django.utils import timezone
+
+from core.models import Balance
+
+
+def _create_and_reload_balance(amount):
+    bal = Balance.objects.create(amount=amount, date=timezone.now().date())
+    bal.refresh_from_db()
+    return bal
+
+
+class PriceFieldTestCase(TestCase):
+
+    def test_normal_decimal(self):
+        bal = _create_and_reload_balance(Decimal("13.37"))
+        self.assertEqual(bal.amount, Decimal("13.37"))
+
+    def test_too_big_decimal(self):
+        with self.assertRaises(InvalidOperation):
+            _create_and_reload_balance(Decimal("13371337.00"))
+
+    def test_rounding_decimal(self):
+        bal = _create_and_reload_balance(Decimal("1.337"))
+        self.assertEqual(bal.amount, Decimal("1.34"))
+
+    def test_normal_int(self):
+        bal = _create_and_reload_balance(1337)
+        self.assertEqual(bal.amount, Decimal("1337.00"))
+
+    def test_too_big_int(self):
+        with self.assertRaises(InvalidOperation):
+            _create_and_reload_balance(13371337)
+
+    def test_normal_float(self):
+        bal = _create_and_reload_balance(13.37)
+        self.assertEqual(bal.amount, Decimal("13.37"))
+
+    def test_too_big_float(self):
+        with self.assertRaises(InvalidOperation):
+            _create_and_reload_balance(13371337.00)
+
+    def test_rounding_float(self):
+        bal = _create_and_reload_balance(1.337)
+        self.assertEqual(bal.amount, Decimal("1.34"))