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Testing Sorting Algorithm Implementation in Python-100-Days

This test suite validates sorting algorithms implementation in Python, specifically testing merge sort and selection sort functionality. The test cases verify correct ordering and edge cases for both sorting methods using unittest framework.

Test Coverage Overview

The test suite provides comprehensive coverage of two sorting algorithms – merge sort and selection sort.

Key areas tested include:

Merge operation between two sorted arrays
Selection sort on unsorted array
Verification of ascending order property
Array manipulation and comparison operations

Implementation Analysis

The testing approach utilizes Python’s unittest framework with TestCase inheritance pattern. The implementation follows AAA (Arrange-Act-Assert) testing pattern with setUp method preparing test data and individual test methods verifying specific functionality.

Framework features utilized include:

TestCase class inheritance
setUp method for test initialization
assertLessEqual for order verification

Technical Details

Testing tools and configuration:

Python unittest framework
Test fixture setup with predefined arrays
Assertion methods for comparison
Test method documentation
Array manipulation utilities

Best Practices Demonstrated

The test suite demonstrates several testing best practices including proper test isolation, clear test method naming, and comprehensive assertion coverage. Notable practices include:

Separate test methods for each sorting algorithm
Consistent data preparation in setUp
Clear test method documentation
Systematic order verification

jackfrued/python-100-days

Day16-20/code/test_example02.py

            
from unittest import TestCase

from example02 import select_sort, merge


class TestExample02(TestCase):
    """测试排序函数的测试用例"""

    def setUp(self):
        self.data1 = [35, 97, 12, 68, 55, 73, 81, 40]
        self.items1 = [12, 35, 68, 97]
        self.items2 = [40, 55, 73, 81]

    def test_merge(self):
        items = merge(self.items1, self.items2)
        for i in range(len(items) - 1):
            self.assertLessEqual(items[i], items[i + 1])

    def test_select_sort(self):
        """测试顺序查找"""
        items = select_sort(self.data1)
        for i in range(len(items) - 1):
            self.assertLessEqual(items[i], items[i + 1])