Kotlin：使用 Mockito 模拟 AWS S3 客户端

Question

我正在尝试模拟使用 AmazonS3ClientBuilder 构建的 S3 客户端。我该怎么做？

这是我的代码：

val s3client: AmazonS3 = AmazonS3ClientBuilder
                .standard()
                .withRegion(s3BucketRegion)
                .build()
val request: PutObjectRequest = PutObjectRequest(
                s3BucketName,
                "$s3BucketKey/file.json",
                ByteArrayInputStream(byteArrayJson),
                metadata
            ).withCannedAcl(CannedAccessControlList.BucketOwnerFullControl)

s3client.putObject(request)

这是我尝试过的方法，但我一直收到 403 错误。这意味着它不是在嘲笑客户端

        val mockS3Client = mock(AmazonS3::class.java)
        val mockPutObjectRequest = mock(PutObjectRequest::class.java)
        val mockPutObjectResult = mock(PutObjectResult::class.java)
        //val mockAmazonS3ClientBuilder = mock(AmazonS3ClientBuilder::class.java)

        //whenever(mockAmazonS3ClientBuilder.withRegion("").build()).thenReturn(mockS3Client)
        whenever(mockS3Client.putObject(mockPutObjectRequest)).thenReturn(mockPutObjectResult)

Answer 1

模拟依赖的一种方法是注入依赖对象。您可以在 Spring 配置 class

中定义一个 AmazonS3 的 bean

@Configuration
class AwsConfig{
  @Bean fun amazonS3() = AmazonS3ClientBuilder
                .standard()
                .withRegion(s3BucketRegion)
                .build()

}

而在依赖class中，只需注入对象

@Service
class MyService(
  private val s3Client: AmazonS3
){
  fun someMethod(){
    val request: PutObjectRequest = PutObjectRequest(
                s3BucketName,
                "$s3BucketKey/file.json",
                ByteArrayInputStream(byteArrayJson),
                metadata
            ).withCannedAcl(CannedAccessControlList.BucketOwnerFullControl)

    s3client.putObject(request)
  }
}

在测试中，您只需将模拟 s3 客户端传递给 MyService

Kotlin：使用 Mockito 模拟 AWS S3 客户端

Kotlin: Mock AWS S3 client using Mockito

java

amazon-s3

mockito

kotlin

spring-boot