Added tests

tests/db_test.py

@@ -0,0 +1,12 @@
+import unittest
+
+from backend.db import DBConnection
+from Noted import DB_FILENAME
+
+class Test_DB(unittest.TestCase):
+	def test_foreign_key(self):
+		DBConnection.file = DB_FILENAME
+		instance = DBConnection(timeout=20.0)
+		self.assertEqual(instance.cursor().execute("PRAGMA foreign_keys;").fetchone()[0], 1)
+		
+