测试是否抛出异常 - java

Question

我有以下代码（引发异常的部分显然是类的一部分，但我只放置了相关行）。

if (found==null)
{
    log.warn("Got request from source IP - " + ip + " which is not in the env - not answering");
    throw new SourceHostUnknownException("This command is only supported from within the Environment");
}



@Test
public void testSecurityResult_whenRVERegex_assertexception()
{

    Throwable exception = Assertions.assertThrows(SourceHostUnknownException.class, () -> {
        SecurityResult result = secSvc.validateRequest(req);
    });
    String expectedMessage = "This command is only supported from within the Environment";
    String actualMessage = exception.getMessage();

    Assertions.assertEquals(expectedMessage,actualMessage);
}

我的目标是测试是否引发了异常，但是当我尝试从异常中获取消息时，该值为空，这意味着异常不包含消息。

我做错了什么？

Answer 1

试试这个：

    Assertions.assertThatExceptionOfType(SourceHostUnknownException.class).isThrownBy(() -> {
        SecurityResult result = secSvc.validateRequest(req);
    }).withMessage("This command is only supported from within the Environment");

---

如果这不起作用，请检查类 SourceHostUnknownException 是否将构造函数参数正确设置到超级消息字段中

，例如，如果您创建自定义异常类并定义构造函数，则需要传递发送给 super 的字符串消息，因为您期望 getMessage() 方法返回错误消息。

public class SourceHostUnknownException extends Exception {

public SourceHostUnknownException(String message) {
    super(message);
}
}