107 lines
2.7 KiB
Python
107 lines
2.7 KiB
Python
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#!/usr/bin/env python3
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# -*- coding: utf-8 -*-
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"""
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计算器功能测试
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"""
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import sys
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import os
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sys.path.insert(0, os.path.dirname(os.path.abspath(__file__)))
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from calculator import add, subtract, multiply, divide, calculate
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def test_basic_operations():
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"""测试基本运算"""
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print("测试基本运算...")
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# 测试加法
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assert add(5, 3) == 8
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assert add(-2, 3) == 1
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assert add(0, 0) == 0
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# 测试减法
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assert subtract(10, 4) == 6
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assert subtract(3, 7) == -4
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assert subtract(0, 5) == -5
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# 测试乘法
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assert multiply(4, 5) == 20
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assert multiply(-3, 2) == -6
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assert multiply(0, 100) == 0
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# 测试除法
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assert divide(10, 2) == 5
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assert divide(7, 2) == 3.5
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assert divide(-12, 3) == -4
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print("基本运算测试通过！")
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def test_divide_by_zero():
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"""测试除零错误"""
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print("测试除零错误...")
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try:
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divide(5, 0)
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print("错误: 除零异常未触发")
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return False
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except ValueError as e:
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assert str(e) == "除数不能为零"
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print("除零错误测试通过！")
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return True
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def test_calculate_function():
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"""测试计算函数"""
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print("测试calculate函数...")
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# 测试有效表达式
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assert calculate("5 + 3") == 8
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assert calculate("10 - 4") == 6
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assert calculate("4 * 5") == 20
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assert calculate("10 / 2") == 5
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assert calculate("7.5 + 2.5") == 10.0
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assert calculate("-3 * 4") == -12
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# 测试无效表达式
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test_cases = [
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("5 +", "表达式格式错误"),
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("+ 3", "表达式格式错误"),
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("5 + 3 4", "表达式格式错误"),
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("5 & 3", "不支持的运算符"),
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("abc + 3", "操作数必须是数字"),
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("5 / 0", "除数不能为零"),
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]
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for expr, expected_error in test_cases:
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try:
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calculate(expr)
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print(f"错误: 表达式 '{expr}' 应触发错误但未触发")
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return False
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except (ValueError, RuntimeError) as e:
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if expected_error not in str(e):
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print(f"错误: 表达式 '{expr}' 返回错误 '{e}'，但期望包含 '{expected_error}'")
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return False
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print("calculate函数测试通过！")
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return True
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def main():
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"""运行所有测试"""
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print("开始计算器测试...")
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print("=" * 50)
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try:
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test_basic_operations()
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test_divide_by_zero()
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test_calculate_function()
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print("=" * 50)
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print("所有测试通过！")
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return 0
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except AssertionError as e:
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print(f"测试失败: {e}")
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return 1
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except Exception as e:
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print(f"测试过程中出现未知错误: {e}")
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return 1
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if __name__ == "__main__":
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sys.exit(main())
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