Add failing test for #2438

Author: cowtowncoder

src/test/java/com/fasterxml/jackson/failing/CreatorFallback2438Test.java

@@ -0,0 +1,38 @@
+package com.fasterxml.jackson.failing;
+
+import com.fasterxml.jackson.annotation.JsonCreator;
+import com.fasterxml.jackson.annotation.JsonProperty;
+
+import com.fasterxml.jackson.databind.*;
+
+// for [databind#2438]
+public class CreatorFallback2438Test extends BaseMapTest
+{
+    static class Creator2438 {
+        int value;
+
+        @JsonCreator
+        public Creator2438(@JsonProperty("value") int v) {
+//System.err.println("DEBUG: value set as "+v);
+            value = v;
+        }
+
+        public int accessValue() { return value; }
+
+        // This or visible (public) setter are required to show the issue
+        public void setValue(int v) { value = v; }
+    }
+
+    private final ObjectMapper MAPPER = newJsonMapper();
+
+    public void testCreator2438() throws Exception
+    {
+        // note: by default, duplicate-detection not enabled, so should not
+        // throw exception. But should also NOT apply second value because
+        // field/setter should NOT be used in case there is already creator property
+        Creator2438 value = MAPPER.readValue(aposToQuotes(
+                "{'value':1, 'value':2}"),
+                Creator2438.class);
+        assertEquals(1, value.accessValue());
+    }
+}