如何用java编写一个期望发出错误的测试[副本]

Question

我正在测试此功能：

fun findByUsername(username: String): Account {
        return accountRepo.findByUsername(username).orElseThrow {
            UsernameNotFoundException("Username was not found")
        }
    }

这是我的测验

@Test
    fun checkFindByUsername() {
        val userRegistrationForm = UserRegistrationForm("testUser3", "123", "eee", false)
        val user = accountService.createAccount(userRegistrationForm)

        assertEquals(accountRepo.findByUsername("").orElseThrow {
            UsernameNotFoundException("Username was not found")
        }, "Username was not found")
    }

Answer 1

假设您使用的是JUnit(5)，您可以使用assertions.assertthrows。

Assertions.assertThrows(UsernameNotFoundException.class, () -> 
    accountRepo.findByUsername("")
);