public async Task CompleteMultiPartUpload_calls_S3_CompleteMultipartUploadAsync() { var request = new CompleteMultipartUploadRequest { BucketName = bucketName, UploadId = "42", Key = "TestFile.pdf", PartETags = new List <PartETag> { new PartETag { ETag = "etag1", PartNumber = 1 }, new PartETag { ETag = "etag2", PartNumber = 2 } } }; await _uploadService.CompleteMultiPartUploadAsync(request); await _s3.Received(1).CompleteMultipartUploadAsync(request); }