From 1f7bcdc4be16f6d69f2caf3f1f332fd3c3f9520d Mon Sep 17 00:00:00 2001
From: Tatu Saloranta <tatu.saloranta@iki.fi>
Date: Mon, 28 Dec 2020 14:34:28 -0800
Subject: [PATCH] Add failing test for #2977

---
 .../CreatorNullPrimitives2977Test.java        | 54 +++++++++++++++++++
 1 file changed, 54 insertions(+)
 create mode 100644 src/test/java/com/fasterxml/jackson/failing/CreatorNullPrimitives2977Test.java

diff --git a/src/test/java/com/fasterxml/jackson/failing/CreatorNullPrimitives2977Test.java b/src/test/java/com/fasterxml/jackson/failing/CreatorNullPrimitives2977Test.java
new file mode 100644
index 0000000000..5268a0f9fa
--- /dev/null
+++ b/src/test/java/com/fasterxml/jackson/failing/CreatorNullPrimitives2977Test.java
@@ -0,0 +1,54 @@
+package com.fasterxml.jackson.failing;
+
+import com.fasterxml.jackson.annotation.JsonProperty;
+
+import com.fasterxml.jackson.databind.*;
+import com.fasterxml.jackson.databind.cfg.ConstructorDetector;
+import com.fasterxml.jackson.databind.introspect.AnnotatedMember;
+import com.fasterxml.jackson.databind.introspect.AnnotatedParameter;
+import com.fasterxml.jackson.databind.introspect.JacksonAnnotationIntrospector;
+
+public class CreatorNullPrimitives2977Test extends BaseMapTest
+{
+    @SuppressWarnings("serial")
+    static class ABCParamIntrospector 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";
+                case 2: return "c";
+                default:
+                    return "param"+ap.getIndex();
+                }
+            }
+            return super.findImplicitPropertyName(param);
+        }
+    }
+
+    static class TestClass2977 {
+        @JsonProperty("aa")
+        final int a;
+
+        // work-around: add JsonProperty on parameter name, or JsonCreator
+//        @com.fasterxml.jackson.annotation.JsonCreator
+        public TestClass2977(int a) {
+            this.a = a;
+        }
+    }
+
+    // [databind#2977]
+    public void testDefaultingWithNull2977() throws Exception
+    {
+        ObjectMapper mapper = jsonMapperBuilder()
+                .enable(DeserializationFeature.FAIL_ON_NULL_FOR_PRIMITIVES)
+                .annotationIntrospector(new ABCParamIntrospector())
+                .constructorDetector(ConstructorDetector.USE_PROPERTIES_BASED)
+                .build();
+        TestClass2977 result = mapper.readValue(a2q("{'aa': 8}"), TestClass2977.class);
+        assertEquals(8, result.a);
+    }
+}