Add a failing test for #3214

Author: cowtowncoder

src/test/java/com/fasterxml/jackson/failing/NullJsonNodeViaCreator3214Test.java

@@ -0,0 +1,35 @@
+package com.fasterxml.jackson.failing;
+
+import com.fasterxml.jackson.annotation.JsonCreator;
+import com.fasterxml.jackson.annotation.JsonProperty;
+import com.fasterxml.jackson.databind.*;
+import com.fasterxml.jackson.databind.node.TextNode;
+
+public class NullJsonNodeViaCreator3214Test extends BaseMapTest
+{
+    static class Pojo3214
+    {
+        JsonNode fromCtor = TextNode.valueOf("x");
+        JsonNode fromSetter = TextNode.valueOf("x");
+
+        @JsonCreator
+        public Pojo3214(@JsonProperty("node") JsonNode n) {
+            this.fromCtor = n;
+        }
+
+        public void setNodeFromSetter(JsonNode nodeFromSetter) {
+            this.fromSetter = nodeFromSetter;
+        }
+    }
+
+    private final ObjectMapper MAPPER = newJsonMapper();
+
+    // [databind#3214]
+    public void testNullFromMissingNodeParameter() throws Exception
+    {
+        Pojo3214 p = MAPPER.readValue("{}", Pojo3214.class);
+        if (p.fromCtor != null) {
+            fail("Expected null to be passed, got instance of "+p.fromCtor.getClass());
+        }
+    }
+}