Groovy Script to test Rest Post Method with Json file and xml file with headers

import com.eviware.soapui.impl.actions.RestServiceBuilder
import com.eviware.soapui.impl.wsdl.WsdlProject
import com.eviware.soapui.impl.wsdl.WsdlSubmitContext
import com.eviware.soapui.impl.rest.support.RestURIParserImpl

f = new File('myexamplefile.txt')
f.text = "This is an example file"
encodedFile = f.bytes.encodeBase64()
f.delete()

service = new RestURIParserImpl("http://jsonplaceholder.typicode.com/posts")
project = new WsdlProject()

new RestServiceBuilder()
 .createRestService(project, service.endpoint + service.resourcePath)

project
 .getInterfaceByName(service.endpoint)
 .getOperationByName(service.resourceName)
 .addNewMethod("Add New Post")
 .with {
 
    setMethod (com.eviware.soapui.impl.rest.RestRequestInterface.HttpMethod.POST)
 
    addNewRequest("Request 1")
    .with {

        requestHeaders << ["Content-Type":"application/json"]        
        requestHeaders << ["Accept":"application/json"]

        requestContent = """
            {
                "content":"Hi, this is my new post.",
                "attachment":"$encodedFile"
            }
        """

        
        submit(new WsdlSubmitContext(), false).response
        .with {
        
            assert statusCode == 201 // Created
            assert statusCode == javax.servlet.http.HttpServletResponse.SC_CREATED

            new groovy.json.JsonSlurper().parseText(contentAsString)
             .with { 

                 assert id in Integer
                 assert id == 101
                 
                 assert content == "Hi, this is my new post."
                 
                 assert attachment == 'VGhpcyBpcyBhbiBleGFtcGxlIGZpbGU='
                 assert new String(attachment.decodeBase64()) == "This is an example file"
                 
             }
             
         }
         
    }
    
}