Add failing test for #41

Author: cowtowncoder

hibernate3/pom.xml

@@ -60,7 +60,6 @@ Hibernate (http://hibernate.org) version 3.x data types.
     <dependency>
       <groupId>com.fasterxml.jackson.core</groupId>
       <artifactId>jackson-annotations</artifactId>
-      <version>${version.jackson.annotations}</version>
       <scope>test</scope>
     </dependency>
 	<dependency>

hibernate4/pom.xml

@@ -59,7 +59,6 @@ Hibernate (http://hibernate.org) version 4.x data types.
     <dependency>
       <groupId>com.fasterxml.jackson.core</groupId>
       <artifactId>jackson-annotations</artifactId>
-      <version>${version.jackson.annotations}</version>
       <scope>test</scope>
     </dependency>
 	<dependency>

hibernate5/pom.xml

@@ -64,10 +64,16 @@ Hibernate (http://hibernate.org) version 5.x data types.
       <version>4.8.2</version>
       <scope>test</scope>
     </dependency>
+    <!--  and for some contributed tests Mockito -->
+    <dependency>
+      <groupId>org.mockito</groupId>
+      <artifactId>mockito-core</artifactId>
+      <version>1.10.19</version>
+      <scope>test</scope>
+    </dependency>
     <dependency>
       <groupId>com.fasterxml.jackson.core</groupId>
       <artifactId>jackson-annotations</artifactId>
-      <version>${version.jackson.annotations}</version>
       <scope>test</scope>
     </dependency>
 	<dependency>

hibernate5/src/test/java/com/fasterxml/jackson/datatype/hibernate5/failing/Issue41Test.java

@@ -0,0 +1,87 @@
+package com.fasterxml.jackson.datatype.hibernate5.failing;
+
+import javax.persistence.Entity;
+import javax.persistence.Id;
+
+import org.mockito.stubbing.Answer;
+import org.mockito.invocation.InvocationOnMock;
+
+import static org.mockito.Mockito.mock;
+import static org.mockito.Mockito.when;
+
+import org.hibernate.proxy.HibernateProxy;
+import org.hibernate.proxy.LazyInitializer;
+
+import com.fasterxml.jackson.annotation.JsonIdentityInfo;
+import com.fasterxml.jackson.annotation.ObjectIdGenerators;
+
+import com.fasterxml.jackson.databind.ObjectMapper;
+import com.fasterxml.jackson.datatype.hibernate5.BaseTest;
+
+/**
+ * Problem with handling of Object Id, [datatype-hibernate#41]
+ */
+public class Issue41Test extends BaseTest
+{
+    @Entity
+    @JsonIdentityInfo(generator=ObjectIdGenerators.PropertyGenerator.class, property = "id")
+    public static class SomeJPAEntity  {
+        @Id
+        public String id;
+
+        // @ManyToOne not needed because we mock this
+        public SomeJPAEntity owner;
+    }
+
+    public static class EntityHibernateProxy extends SomeJPAEntity implements HibernateProxy
+    {
+        private static final long serialVersionUID = 1L;
+
+        private LazyInitializer lazyInitializer;
+
+        public EntityHibernateProxy() {
+            this(true);
+        }
+
+        public EntityHibernateProxy(final boolean uninitialized) {
+            lazyInitializer = mock(LazyInitializer.class);
+            when(lazyInitializer.isUninitialized()).thenReturn(uninitialized);
+            final String currId = "d0024148-3040-4fee-a78a-e94fd2449ac6";
+            when(lazyInitializer.getIdentifier()).thenReturn(currId);
+            when(lazyInitializer.getEntityName()).thenReturn("someJPAEntity");
+
+            when(lazyInitializer.getImplementation()).thenAnswer(new Answer<Object>() {
+
+                @Override
+                public Object answer(InvocationOnMock invocation) throws Throwable {
+                    SomeJPAEntity entity = new SomeJPAEntity();
+                    entity.id = id;
+                    entity.owner = new EntityHibernateProxy(false);
+                    return entity;
+                }});
+        }
+
+        @Override
+        public Object writeReplace() {
+            return this;
+        }
+
+        @Override
+        public LazyInitializer getHibernateLazyInitializer() {
+            return lazyInitializer;
+        }
+    }
+    
+    public void testIssue41() throws Exception
+    {
+        EntityHibernateProxy entity = new EntityHibernateProxy(false);
+        entity.id = "3cf7a573-f528-440c-83b9-873d7594b373";
+        entity.owner = entity;
+
+        ObjectMapper mapper = mapperWithModule(true);
+        String json = mapper.writeValueAsString(entity);
+
+        // will throw an exception long before here so this should suffice:
+        assertNotNull(json);
+    }
+}