Rules for Serialization

• Whether it will be serialized to JSON or XML that depends upon what we pass as Content-Type. If we pass Content-Type as application/json then Rest Assured will serialize the Object to JSON. To serialize to JSON , Rest Assured will look for which JSON parser is available in class path.
• First it looks for Jackson. If Jackson is not found it looks for GSON. If both are not found then an exception IllegalArgumentException stating “Cannot serialize because no JSON or XML serializer found in classpath.” will be thrown.

• If we pass Content-Type as “application/xml” then Rest Assured will serialize Object in to XML and for that it looks for JAXB library in class path of project. If it is not found then an exception IllegalArgumentException stating “Cannot serialize because no JSON or XML serializer found in classpath.” will be thrown.

Note :- This works for the POST and PUT methods only.