Improve test for #1261

src/test/java/com/fasterxml/jackson/failing/ObjectWithCreator1261Test.java

@@ -1,16 +1,115 @@
 package com.fasterxml.jackson.failing;
 
-import java.util.ArrayList;
-import java.util.Collections;
-import java.util.List;
+import java.io.StringReader;
+import java.util.*;
 
 import com.fasterxml.jackson.annotation.*;
-
 import com.fasterxml.jackson.databind.*;
 
 public class ObjectWithCreator1261Test
     extends BaseMapTest
 {
+    static class Answer
+    {
+       public SortedMap<String, Parent> parents;
+
+       public Answer() {
+           parents = new TreeMap<String, Parent>();
+       }
+    }
+
+    @JsonIdentityInfo(generator = ObjectIdGenerators.IntSequenceGenerator.class, property = "@id")
+    static class Parent
+    {
+       public Map<String, Child> children;
+
+       @JsonIdentityReference(alwaysAsId = true)
+       public Child favoriteChild;
+
+       public String name;
+
+       protected Parent() { }
+
+       public Parent(String name, boolean ignored) {
+           children = new TreeMap<String, Child>();
+           this.name = name;
+       }
+    }
+
+    @JsonInclude(JsonInclude.Include.NON_NULL)
+    @JsonIdentityInfo(generator = ObjectIdGenerators.IntSequenceGenerator.class, property = "@id")
+    static class Child
+    {
+        public String name;
+
+        @JsonIdentityReference(alwaysAsId = true)
+        public Parent parent;
+
+        @JsonIdentityReference(alwaysAsId = true)
+        public List<Parent> parentAsList;
+
+        public String someNullProperty;
+
+        protected Child() { }
+
+        @JsonCreator
+        public Child(@JsonProperty("name") String name,
+              @JsonProperty("someNullProperty") String someNullProperty) {
+            this.name = name;
+            this.someNullProperty = someNullProperty;
+        }
+
+        public Child(String n) {
+            name = n;
+        }
+    }
+
+    public void testObjectIds1261() throws Exception
+    {
+         ObjectMapper mapper = new ObjectMapper();
+         mapper.enable(SerializationFeature.INDENT_OUTPUT);
+         mapper.enable(MapperFeature.SORT_PROPERTIES_ALPHABETICALLY);
+
+         Answer initialAnswer = createInitialAnswer();
+         String initialAnswerString = mapper.writeValueAsString(initialAnswer);
+// System.out.println("Initial answer:\n"+initialAnswerString);
+         JsonNode tree = mapper.readTree(initialAnswerString);
+         Answer deserializedAnswer = mapper.readValue(initialAnswerString,
+               Answer.class);
+         String reserializedAnswerString = mapper
+               .writeValueAsString(deserializedAnswer);
+         JsonNode newTree = mapper.readTree(reserializedAnswerString);
+         if (!tree.equals(newTree)) {
+                  fail("Original and recovered Json are different. Recovered = \n"
+                        + reserializedAnswerString + "\n");
+         }
+   }
+
+   private Answer createInitialAnswer() {
+      Answer answer = new Answer();
+      String child1Name = "child1";
+      String child2Name = "child2";
+      String parent1Name = "parent1";
+      String parent2Name = "parent2";
+      Parent parent1 = new Parent(parent1Name, false);
+      answer.parents.put(parent1Name, parent1);
+      Child child1 = new Child(child1Name);
+      child1.parent = parent1;
+      child1.parentAsList = Collections.singletonList(parent1);
+      Child child2 = new Child(child2Name);
+      Parent parent2 = new Parent(parent2Name, false);
+      child2.parent = parent2;
+      child2.parentAsList = Collections.singletonList(parent2);
+      parent1.children.put(child1Name, child1);
+      parent1.children.put(child2Name, child2);
+      answer.parents.put(parent2Name, parent2);
+      return answer;
+   }    
+    // 14-Jun-2016, tatu: Original test, has a cycle which may render it impossible
+    //    to support (although better error message would be nice).
+    //   Left here in case we'll fix the other problem above.
+
+    /*
     static class Answer {
         private List<Parent> _parents;
 
@@ -111,5 +210,5 @@ private static Answer createInitialAnswer() {
       parent1.setFavoriteChild(child5);
       return answer;
    }
-
+*/
 }