BatchMediaItemResponse made serializable, with tests to confirm

extensions/data-transfer/portability-data-transfer-google/src/main/java/org/datatransferproject/datatransfer/google/mediaModels/BatchMediaItemResponse.java

@@ -19,9 +19,10 @@
 import com.fasterxml.jackson.annotation.JsonCreator;
 import com.fasterxml.jackson.annotation.JsonProperty;
 
+import java.io.Serializable;
 import java.util.Arrays;
 
-public class BatchMediaItemResponse {
+public class BatchMediaItemResponse implements Serializable {
   @JsonProperty("newMediaItemResults")
   private NewMediaItemResult[] results;
 

extensions/data-transfer/portability-data-transfer-google/src/test/java/org/datatransferproject/datatransfer/google/mediaModels/BatchMediaItemResponseTest.java

@@ -0,0 +1,52 @@
+package org.datatransferproject.datatransfer.google.mediaModels;
+
+import static java.lang.String.format;
+import static org.junit.Assert.assertTrue;
+
+import com.fasterxml.jackson.databind.DeserializationFeature;
+import com.fasterxml.jackson.databind.ObjectMapper;
+import java.io.ByteArrayOutputStream;
+import java.io.ObjectOutputStream;
+import org.junit.Test;
+
+public class BatchMediaItemResponseTest {
+  private static final ObjectMapper mapper = new ObjectMapper()
+      .configure(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES, true);
+
+  @Test
+  public void batchMediaItemResponse_isSerializable() {
+    String photoStringJSON = "{\"cameraMake\":\"testMake\", \"cameraModel\":\"testModel\","
+        + "\"focalLength\":\"5.0\", \"apertureFNumber\":\"2.0\", \"isoEquivalent\":\"8.0\", "
+        + "\"exposureTime\":\"testExposureTime\"}";
+    String videoStringJSON = "{\"cameraMake\":\"testMake\", \"cameraModel\":\"testModel\","
+        + "\"fps\": \"30\", \"status\": \"READY\"}";
+    String mediaMetadataStringJSON = format("{\"photo\": %s, \"video\": %s}", photoStringJSON, videoStringJSON);
+    String googleMediaItemStringJSON = format("{\"id\":\"test_id\", \"description\":\"test description\","
+        + " \"baseUrl\":\"www.testUrl.com\", \"mimeType\":\"image/png\", \"mediaMetadata\": %s,"
+        + " \"filename\":\"filename.png\", \"productUrl\":\"www.testProductUrl.com\", "
+        + "\"uploadedTime\":\"1697153355456\"}", mediaMetadataStringJSON);
+
+    String statusStringJSON = "{\"code\": 200, \"message\": \"testMessage\"}";
+    String newMediaItemStringJSON = format("{\"uploadToken\":\"testUploadToken\", \"status\": %s, "
+        + "\"mediaItem\":%s}", statusStringJSON, googleMediaItemStringJSON);
+
+    String batchMediaItemResponseStringJSON = format("{\"newMediaItemResults\":[%s, %s]}", newMediaItemStringJSON, newMediaItemStringJSON);
+
+
+    boolean serializable = true;
+    // Turning an object into a byte array can only be done if the class is serializable.
+    try {
+      BatchMediaItemResponse batchMediaItemResponse = mapper.readValue(batchMediaItemResponseStringJSON,
+          BatchMediaItemResponse.class);
+      ByteArrayOutputStream bos = new ByteArrayOutputStream();
+      ObjectOutputStream oos = new ObjectOutputStream(bos);
+      oos.writeObject(batchMediaItemResponse);
+      oos.flush();
+      byte[] data = bos.toByteArray();
+    } catch (Exception e) {
+      serializable = false;
+    }
+    assertTrue(serializable);
+  }
+
+}