src/test/java/com/fasterxml/jackson/databind/misc/CaseInsensitive1854Test.java

package com.fasterxml.jackson.databind.misc;

import java.util.List;

import com.fasterxml.jackson.annotation.*;
import com.fasterxml.jackson.databind.*;

public class CaseInsensitive1854Test extends BaseMapTest
{
    static class Obj1854 {
        private final int id;

// 17-Dec-2017, tatu: One of following would work around the bug [databind#1854]        
//        @JsonProperty("Items")
//        @JsonIgnore
        private final List<ChildObj> items;

        public Obj1854(int id, List<ChildObj> items) {
            this.id = id;
            this.items = items;
        }

        @JsonCreator
        public static Obj1854 fromJson(@JsonProperty("ID") int id,
                @JsonProperty("Items") List<ChildObj> items) {
            return new Obj1854(id, items);
        }

        public int getId() {
            return id;
        }

        public List<ChildObj> getItems() {
            return items;
        }

    }

    static class ChildObj {
        private final String childId;

        private ChildObj(String id) {
            this.childId = id;
        }

        @JsonCreator
        public static ChildObj fromJson(@JsonProperty("ChildID") String cid) {
            return new ChildObj(cid);
        }

        public String getId() {
            return childId;
        }
    }

    public void testIssue1854() throws Exception
    {
        ObjectMapper mapper = new ObjectMapper();
        mapper.enable(MapperFeature.ACCEPT_CASE_INSENSITIVE_PROPERTIES);
        final String DOC = aposToQuotes("{'ID': 1, 'Items': [ { 'ChildID': 10 } ]}");
        Obj1854 result = mapper.readValue(DOC, Obj1854.class);
        assertNotNull(result);
        assertEquals(1, result.getId());
        assertNotNull(result.getItems());
        assertEquals(1, result.getItems().size());
    }
}