Add failing test #4452

src/test-jdk17/java/com/fasterxml/jackson/databind/failing/RecordCreatorSerialization4452Test.java

@@ -0,0 +1,67 @@
+package com.fasterxml.jackson.databind.failing;
+
+import com.fasterxml.jackson.annotation.JsonCreator;
+import com.fasterxml.jackson.annotation.JsonProperty;
+import com.fasterxml.jackson.databind.ObjectMapper;
+import com.fasterxml.jackson.databind.json.JsonMapper;
+import com.fasterxml.jackson.databind.records.Jdk8ConstructorParameterNameAnnotationIntrospector;
+import org.junit.jupiter.api.Test;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertTrue;
+
+// [databind#4452] : JsonProperty not serializing field names properly on JsonCreator in record #4452
+class RecordCreatorSerialization4452Test {
+
+    public record PlainTestObject(
+            @JsonProperty("strField") String testFieldName,
+            @JsonProperty("intField") Integer testOtherField
+    ) { }
+
+    public record CreatorTestObject(
+            String testFieldName,
+            Integer testOtherField
+    ) {
+        @JsonCreator
+        public CreatorTestObject(
+                @JsonProperty("strField") String testFieldName,
+                @JsonProperty("someOtherIntField") Integer testOtherIntField,
+                @JsonProperty("intField") Integer testOtherField)
+        {
+            this(testFieldName, testOtherField + testOtherIntField);
+        }
+    }
+
+    private final ObjectMapper OBJECT_MAPPER =
+            JsonMapper.builder()
+                    .annotationIntrospector(new Jdk8ConstructorParameterNameAnnotationIntrospector())
+                    .build();
+
+    // supposed to pass, and yes it does
+    @Test
+    public void testPlain()
+            throws Exception
+    {
+        String result = OBJECT_MAPPER.writeValueAsString(new PlainTestObject("test", 1));
+        assertEquals("{\"strField\":\"test\",\"intField\":1}", result);
+    }
+
+    // Should pass but doesn't
+    // It did pass in 2.15 or earlier versions, but it fails in 2.16 or later
+    @Test
+    public void testWithCreator()
+            throws Exception
+    {
+        String result = OBJECT_MAPPER
+                .writeValueAsString(new CreatorTestObject("test", 2, 1));
+        /*
+        Serializes to:
+
+            {"testFieldName":"test","testOtherField":3}
+
+         */
+        assertTrue(result.contains("intField"));
+        assertTrue(result.contains("strField"));
+    }
+
+}

src/test-jdk17/java/com/fasterxml/jackson/databind/records/Jdk8ConstructorParameterNameAnnotationIntrospector.java

@@ -5,7 +5,7 @@
 import com.fasterxml.jackson.databind.introspect.AnnotatedParameter;
 import com.fasterxml.jackson.databind.introspect.JacksonAnnotationIntrospector;
 
-class Jdk8ConstructorParameterNameAnnotationIntrospector extends JacksonAnnotationIntrospector
+public class Jdk8ConstructorParameterNameAnnotationIntrospector extends JacksonAnnotationIntrospector
 {
     private static final long serialVersionUID = 1L;