Spring 为 putMapping 启动 Junit 测试 returns 始终为 null

Question

我有一个 PutMapping，它会首先检查 Reward-Entity，然后如果存在，它将进一步更新 Entity

@PutMapping
public ResponseEntity<RewardResponse> updateValidReward(Principal updatedPrincipal,
                                                                @RequestBody RewardUpdateRequest rewardUpdateRequest) {

            Optional<RewardEntity> rewardEntityInDatabase =
                RewardService.getRewardById(rewardUpdateRequest.getRewardId());

        if (!rewardEntityInDatabase.isPresent()) {
                return new ResponseEntity<>(HttpStatus.NOT_FOUND);
        }

        RewardEntity updatedReward = updateReward(updatedPrincipal,
                rewardUpdateRequest, rewardEntityInDatabase.get());

        RewardResponse updatedRewardResponse = RewardResponse.builder()
                .reward(RewardMapper.fromRewardEntity(updatedReward))
                .build();

        return ResponseEntity.ok(updatedRewardResponse);
}

当我尝试为此编写一个 Test-case 时，这对我来说是一个挑战，格式如下

ResponseEntity<RewardResponse> rewardResponse =
                controller.updateValidReward(principal, rewardUpdateRequest);


        RewardApi rewardApiToValidate = rewardResponse.getBody().getReward();
        assertThat(rewardApiExpected.getRewardTitle()).isEqualTo(rewardApiToValidate.getRewardTitle());
        assertThat(rewardApiExpected.getRewardText()).isEqualTo(rewardApiToValidate.getRewardText());

当测试代码中的下面一行被执行时，我总是得到 NullPointerException

rewardResponse.getBody().getReward();

因为实际代码中的下面条件总是变成 true 并且它总是返回 HttpStatus.NOT_FOUND

if (!rewardEntityInDatabase.isPresent()) {
                    return new ResponseEntity<>(HttpStatus.NOT_FOUND);
            }

如何解决这个问题？

Answer 1

我通过准确调用原始代码中的 Controller 来解决这个问题。首先，我通过我的测试代码调用了 Optional --> getRewardIdFromDatabase() 代码，我执行了 update 方法控制器

Spring 为 putMapping 启动 Junit 测试 returns 始终为 null

Spring boot Junit testing for putMapping returns always null

junit

spring-boot

spring-boot-test