PHP中封装性的回归测试方法

// 定义一个封装性很好的类
class Calculator {
    private $result;

    public function __construct() {
        $this->result = 0;
    }

    public function add($num) {
        $this->result += $num;
    }

    public function subtract($num) {
        $this->result -= $num;
    }

    public function multiply($num) {
        $this->result *= $num;
    }

    public function divide($num) {
        if ($num != 0) {
            $this->result /= $num;
        } else {
            throw new Exception("Can't divide by zero.");
        }
    }

    public function getResult() {
        return $this->result;
    }
}

// 编写回归测试方法
function regressionTest() {
    $calculator = new Calculator();

    $calculator->add(5);
    assert($calculator->getResult() == 5);

    $calculator->subtract(2);
    assert($calculator->getResult() == 3);

    $calculator->multiply(4);
    assert($calculator->getResult() == 12);

    $calculator->divide(3);
    assert($calculator->getResult() == 4);

    // 添加更多的测试用例...

    echo "All regression tests passed.";
}

// 执行回归测试
regressionTest();