Test/test_model_foo.py

import unittest
from my_app.models.foo import FooModel

class TestFooModel(unittest.TestCase):
    def setUp(self):
        self.foo_model = FooModel()

    def tearDown(self):
        del self.foo_model

    def test_some_method(self):
        # Arrange
        some_data = {"key": "value"}

        # Act
        result = self.foo_model.some_method(some_data)

        # Assert
        self.assertTrue(result)

if __name__ == '__main__':
    unittest.main()