Add a (failing) test for implicit multi-arg-creator test, support to be added in 2.6

Author: cowtowncoder

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

@@ -0,0 +1,75 @@
+package com.fasterxml.jackson.failing;
+
+import com.fasterxml.jackson.annotation.JsonAutoDetect.Visibility;
+import com.fasterxml.jackson.annotation.PropertyAccessor;
+import com.fasterxml.jackson.databind.*;
+import com.fasterxml.jackson.databind.introspect.AnnotatedMember;
+import com.fasterxml.jackson.databind.introspect.AnnotatedParameter;
+import com.fasterxml.jackson.databind.introspect.JacksonAnnotationIntrospector;
+
+public class MultiArgConstructorTest extends BaseMapTest
+{
+    static class MultiArgCtorBean
+    {
+        protected int a, b;
+
+        public MultiArgCtorBean(int a, int b) {
+            this.a = a;
+            this.b = b;
+        }
+    }
+
+    /* Before JDK8, we won't have parameter names available, so let's
+     * fake it before that...
+     */
+    @SuppressWarnings("serial")
+    static class MyParamIntrospector extends JacksonAnnotationIntrospector
+    {
+        @Override
+        public String findImplicitPropertyName(AnnotatedMember param) {
+            if (param instanceof AnnotatedParameter) {
+                AnnotatedParameter ap = (AnnotatedParameter) param;
+                switch (ap.getIndex()) {
+                case 0: return "a";
+                case 1: return "b";
+                default:
+                    return "param"+ap.getIndex();
+                }
+            }
+            return super.findImplicitPropertyName(param);
+        }
+    }
+    
+    /*
+    /********************************************************************** 
+    /* Test methods
+    /********************************************************************** 
+     */
+
+    public void testMultiArgVisible() throws Exception
+    {
+        final ObjectMapper mapper = new ObjectMapper();
+        mapper.setAnnotationIntrospector(new MyParamIntrospector());
+        MultiArgCtorBean bean = mapper.readValue(aposToQuotes("{'b':13,  'a':-99}"),
+                MultiArgCtorBean.class);
+        assertNotNull(bean);
+        assertEquals(13, bean.b);
+        assertEquals(-99, bean.a);
+    }
+
+    // but let's also ensure that it is possible to prevent use of that constructor
+    // with different visibility
+    public void testMultiArgNotVisible() throws Exception
+    {
+        final ObjectMapper mapper = new ObjectMapper();
+        mapper.setAnnotationIntrospector(new MyParamIntrospector());
+        mapper.setVisibility(PropertyAccessor.CREATOR, Visibility.NONE);
+        try {
+            /*MultiArgCtorBean bean =*/ mapper.readValue(aposToQuotes("{'b':13,  'a':-99}"),
+                MultiArgCtorBean.class);
+            fail("Should not have passed");
+        } catch (JsonMappingException e) {
+            verifyException(e, "No suitable constructor");
+        }
+    }
+}