write some tests

pytest.ini

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+[pytest]
+testpaths = tests
+python_files = test_*.py
+python_classes = Test*
+python_functions = test_*

requirements-dev.txt

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+pytest>=7.0.0
+pytest-cov>=4.0.0

tests/test_sample.py

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+import unittest
+
+class TestSample(unittest.TestCase):
+    def setUp(self):
+        """Set up test fixtures before each test method."""
+        self.test_value = 10
+
+    def tearDown(self):
+        """Clean up test fixtures after each test method."""
+        pass
+
+    def test_addition(self):
+        """Test basic addition."""
+        self.assertEqual(1 + 1, 2)
+
+    def test_multiplication(self):
+        """Test basic multiplication."""
+        self.assertEqual(2 * 3, 6)
+
+    def test_string_concatenation(self):
+        """Test string concatenation."""
+        self.assertEqual("Hello " + "World", "Hello World")
+
+    def test_list_operations(self):
+        """Test list operations."""
+        test_list = [1, 2, 3]
+        test_list.append(4)
+        self.assertEqual(len(test_list), 4)
+        self.assertIn(4, test_list)
+
+    def test_value_from_setup(self):
+        """Test using value from setUp."""
+        self.assertEqual(self.test_value, 10)
+        self.assertGreater(self.test_value, 5)
+
+if __name__ == '__main__':
+    unittest.main()