package jackson

import com.fasterxml.jackson.annotation.JsonInclude
import com.fasterxml.jackson.databind.ObjectMapper
import spock.lang.Specification

class ObjectMapperTest extends Specification {
    def "should not include nulls"() {
        given:
        def json = '''
                {
                    "a": {},
                    "b": [],
                    "c": "",
                    "d": 0,
                    "e": null
                }
        '''

        def obj = [
                "a": [:],
                "b": [],
                "c": "",
                "d": 0,
                "e": null
        ]

        def jsonMapper = new ObjectMapper()
                .setSerializationInclusion(JsonInclude.Include.NON_NULL)
        def tree = jsonMapper.readTree(json)


        when:
        def a1 = jsonMapper.writeValueAsString(tree)
        def a2 = jsonMapper.writeValueAsString(obj)

        then:
        a1 == a2
    }
}