if fi.Metadata["etag"] == "" {
		if opts.UserDefined["etag"] != "" {
			fi.Metadata["etag"] = opts.UserDefined["etag"]
		} else { // fallback if not already calculated in handler.
			fi.Metadata["etag"] = getCompleteMultipartMD5(parts)
		}
	}

	// Save the consolidated actual size.
	if opts.ReplicationRequest {
		if v := opts.UserDefined[ReservedMetadataPrefix+"Actual-Object-Size"]; v != "" {

		// a successful call to CompleteMultipartUpload.
		{
			[]CompletePart{
				{ETag: validPartMD5, PartNumber: 6},
			},
		},
	}
	s3MD5 := getCompleteMultipartMD5(inputParts[3].parts)

	// Test cases with sample input values for CompleteMultipartUpload.
	testCases := []struct {
		bucket   string
		object   string
		uploadID string
		parts    []CompletePart

				{ETag: validPartMD5, PartNumber: 2},
			},
		},
	}

	// on successful complete multipart operation the s3MD5 for the parts uploaded will be returned.
	s3MD5 := getCompleteMultipartMD5(inputParts[3].parts)

	// generating the response body content for the success case.