created test directory to test models

backend/tests/models/conftest.py

@@ -0,0 +1,42 @@
+"""
+
+"""
+import os
+from sqlalchemy import create_engine
+from sqlalchemy.orm import sessionmaker
+from project import db
+from project.models.users import Users
+from sqlalchemy.engine.url import URL
+from dotenv import load_dotenv
+import pytest
+
+load_dotenv()
+
+DATABSE_NAME = os.getenv('POSTGRES_DB')
+DATABASE_USER = os.getenv('POSTGRES_USER')
+DATABASE_PASSWORD = os.getenv('POSTGRES_PASSWORD')
+DATABASE_HOST = os.getenv('POSTGRES_HOST')
+
+url = URL.create(
+    drivername="postgresql",
+    username=DATABASE_USER,
+    host=DATABASE_HOST,
+    database=DATABSE_NAME,
+    password=DATABASE_PASSWORD
+)
+
+engine = create_engine(url)
+Session = sessionmaker(bind=engine)
+
+@pytest.fixture
+def db_session():
+    db.metadata.create_all(engine)
+    session = Session()
+    yield session
+    session.rollback()
+    session.close()
+
+@pytest.fixture
+def valid_user():
+    user = Users(uid="student", is_teacher=False, is_admin=False)
+    return user

backend/tests/models/users_test.py

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+from project.models.users import Users
+
+
+class TestModels:
+    """Test class for the database models"""
+
+    def test_valid_user(self, db_session, valid_user):
+        db_session.add(valid_user)
+        db_session.commit()
+        assert valid_user in db_session.query(Users).all()