Java Junit - 预期抛出异常但没有抛出任何异常

Question

抛出“预期的异常但什么都没有”导致我的测试用例失败。如何解决这个问题。如果在查找阶乘时数字为负，我想抛出异常，

测试文件：

public void testCalculateFactorialWithOutOfRangeException(){

  Factorial factorial = new Factorial();
    assertThrows(OutOfRangeException.class,
     () -> factorial.calculateFactorial(-12));

}

代码文件：

public class Factorial {
    public String calculateFactorial(int number) {
        //If the number is less than 1
        try {
            if (number < 1)
                throw new OutOfRangeException("Number cannot be less than 1");
            if (number > 1000)
                throw new OutOfRangeException("Number cannot be greater than 1000");

        } catch (OutOfRangeException e) {

        }
    }
}

public class OutOfRangeException extends Exception {
    public OutOfRangeException(String str) {
        super(str);
    }
}

我预计输出会成功，但它导致了失败

Answer 1

您的测试很好，问题在于您的代码没有抛出异常，或者更正确的是抛出并捕获它。

catch (OutOfRangeException e)从方法中删除子句并添加throws OutOfRangeException，然后您的测试将通过