Multipart with DataSource throwing "No Serializer Found" Exception

[Reza]

Hey guys, 

I am trying to test a PUT request with test assured. The request takes a multipart param with DataSource (javax.activation) as value. 

@Multipart("image") DataSource image

I keep receiving the serializable exception: 

No serializer found for class java.io.BufferedInputStream and no properties discovered to create BeanSerializer (to avoid exception, disable SerializationFeature.FAIL_ON_EMPTY_BEANS) )

 Here is my rest assured test:

InputStream is = myClass.class.getClassLoader().getResourceAsStream("somePic.png");
DataSource ds = new InputStreamDataSource(imageStream, MediaType.IMAGE_PNG_VALUE);

given(getDocumentationSpec())
      .sessionId(user)
      .multiPart("image", ds)
      .contentType("multipart/form-data")
      .when()
      .put("path", userId)
      .then()
      .statusCode(Status.OK.getStatusCode());

Any idea? 

[Johan Haleby]

Could you try passing it as an inputstream instead?

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[Reza]

I cannot because the API takes only DataSource

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[Johan Haleby]

What about something like this? http://stackoverflow.com/a/35345564/398441. Use it to convert it to an input stream that you pass to RA.

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[Reza]

Tried it .. did not work... The same serialization issue!