refactored app structure

tests/test_web.py

@@ -0,0 +1,24 @@
+import unittest
+
+from flask import current_app
+
+from app import create_app, db
+
+
+class BasicTestCase(unittest.TestCase):
+    def setUp(self) -> None:
+        self.app = create_app('testing')
+        self.app_context = self.app.app_context()
+        self.app_context.push()
+        db.create_all()
+
+    def tearDown(self) -> None:
+        db.session.remove()
+        db.drop_all()
+        self.app_context.pop()
+
+    def test_app_exists(self):
+        self.assertFalse(current_app is None)
+
+    def test_app_is_testing(self):
+        self.assertTrue(current_app.config['TESTING'])