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Learn Python 3: Comprehensive Programming Guide

Quiz: Testing and Code Quality

Validate your mastery of unit testing, pytest fixtures, mocking dependencies, and static analysis questions.

We'll cover the following...
Technical Quiz
1.

We have a test class utilizing the unittest framework. Consider the following setup:

import unittest

class TestDatabase(unittest.TestCase):
    data = []

    def setUp(self):
        self.data.append(1)

    def test_add_one(self):
        self.assertEqual(len(self.data), 1)

    def test_add_two(self):
        self.assertEqual(len(self.data), 1)

What happens when we run this test suite (assuming that the execution order is test_add_one then test_add_two)?

A.

Both tests pass.

B.

test_add_one passes, but test_add_two fails because len(self.data) is 2.

C.

test_add_one fails because data is not initialized in __init__.

D.

Both tests fail because setUp cannot modify class attributes.

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