Junit测试一直失败，出现IllegalArgumentException

Question

我试过放置try和catch块以及抛出新的IllegalArgumentException，但这些都没有停止失败的测试。我遗漏了什么?谢谢你。

package com.udacity.jdnd.course1.service;
public class FizzBuzzService {
/**
* If number is divisible by 3, return "Fizz". If divisible by 5,
* return "Buzz", and if divisible by both, return "FizzBuzz". Otherwise,
* return the number itself.
*
* @Throws IllegalArgumentException for values < 1
*/
public String fizzBuzz(int number) {
String result = "";
try {
if (number % 3 == 0 && number % 5 == 0) {
result = "FizzBuzz";
} else {
if (number % 3 == 0) {
result = "Fizz";
} else if (number % 5 == 0) {
result = "Buzz";
} else {
return Integer.toString(number);
}
}
if (number == 0){
throw new IllegalArgumentException("Value is zero ");
}
//            return result;
//        }
} catch(IllegalArgumentException i){
System.out.println("this what is thrown " + i);
}
return result;
}

}

package com.udacity.jdnd.course1;
import com.udacity.jdnd.course1.service.FizzBuzzService;
import org.junit.jupiter.api.Test;
import org.springframework.boot.test.context.SpringBootTest;
import static org.junit.jupiter.api.Assertions.*;
@SpringBootTest
class Course1ApplicationTests {
@Test
void testFizzBuzz(){
FizzBuzzService fbs = new FizzBuzzService();
// check non-divisible numbers return themselves
assertEquals("1", fbs.fizzBuzz(1));
assertEquals("47", fbs.fizzBuzz(47));
assertEquals("121", fbs.fizzBuzz(121));
// check numbers divisible by 3
assertEquals("Fizz", fbs.fizzBuzz(3));
assertEquals("Fizz", fbs.fizzBuzz(333));
//check numbers divisible by 5
assertEquals("Buzz", fbs.fizzBuzz(5));
assertEquals("Buzz", fbs.fizzBuzz(85));
//check numbers divisible by 3 and 5
assertEquals("FizzBuzz", fbs.fizzBuzz(15));
assertEquals("FizzBuzz", fbs.fizzBuzz(75));
//check invalid inputs
assertThrows(IllegalArgumentException.class, () -> fbs.fizzBuzz(0));
assertThrows(IllegalArgumentException.class, () -> fbs.fizzBuzz(-1));
}
}

我得到的错误是:

org.opentest4j。AssertionFailedError:预期会抛出java.lang.IllegalArgumentException，但是没有抛出任何异常

at org.junit.jupiter.api.AssertThrows.assertThrows(AssertThrows.java:71)

Answer 1

把这个放在开头，去掉try/catch块

if (number == 0 || number == -1){
throw new IllegalArgumentException("Value is zero ");
}