Add passing test for #767 (fixed by earlier #762 fix)

Author: cowtowncoder

release-notes/CREDITS

@@ -64,7 +64,12 @@ Severin Kistler (@kistlers)
 Simon Cockx (@SimonCockx)
  * Reported #762: Unwrapping lists does not work inside `@JsonUnwrapped`
   (3.2.0)
- 
+
+Veit-Hendrik Schlenker (@vhschlenker)
+ * Reported #767: Unwrapped lists cannot be deserialized when using
+   `JsonTypeInfo.As.EXISTING_PROPERTY`
+  (3.2.0)
+
 Charles Moulliard (@cmoulliard)
  * Reported #795: `HttpHeader` object (= <httpHeaders>) is not wrapped by the XML `<property>` tag
   (3.2.0)

release-notes/VERSION

@@ -47,6 +47,10 @@ Version: 3.x (for earlier see VERSION-2.x)
 #762: Unwrapping lists does not work inside `@JsonUnwrapped`
  (reported by Simon C) 
  (fix by @cowtowncoder, w/ Claude code)
+#767: Unwrapped lists cannot be deserialized when using
+  `JsonTypeInfo.As.EXISTING_PROPERTY`
+ (reported by Veit-Hendrik S)
+ (fix by @cowtowncoder, w/ Claude code)
 #795: `HttpHeader` object (= <httpHeaders>) is not wrapped by the XML `<property>` tag
  (reported by Charles M)
  (fix by Christopher M)

src/test/java/tools/jackson/dataformat/xml/lists/PolymorphicListDeserTest.java

@@ -169,6 +169,30 @@ public MyType490(
         }
     }
 
+    // [dataformat-xml#767]
+    @JsonTypeInfo(
+            use = JsonTypeInfo.Id.NAME,
+            include = JsonTypeInfo.As.EXISTING_PROPERTY,
+            property = "type")
+    @JsonSubTypes({
+            @JsonSubTypes.Type(value = MyType767.class, name = "myType"),
+    })
+    interface IMyType767 { }
+
+    static class MyType767 implements IMyType767 {
+        public final String stringValue;
+        public final String type = "myType";
+        public final Collection<String> typeNames;
+
+        @JsonCreator
+        public MyType767(
+                @JsonProperty("stringValue") String stringValue,
+                @JsonProperty("typeNames") Collection<String> typeNames) {
+            this.stringValue = stringValue;
+            this.typeNames = typeNames;
+        }
+    }
+
     // [dataformat-xml#567]
     @JsonRootName("wrapper")
     static class Wrapper567 extends Base567 {
@@ -321,6 +345,26 @@ public void testPolymorphicUnwrappedList490() throws Exception
         assertEquals(Arrays.asList("type1", "type2"), typedResult.typeNames);
     }
 
+    // [dataformat-xml#767]: Like #490, but with EXISTING_PROPERTY
+    @Test
+    public void testPolymorphicUnwrappedListExistingProperty767() throws Exception
+    {
+        XmlMapper xmlMapper = XmlMapper.builder()
+                .defaultUseWrapper(false).build();
+
+        List<String> typeNames = new ArrayList<>();
+        typeNames.add("type1");
+        typeNames.add("type2");
+        MyType767 input = new MyType767("hello", typeNames);
+        String doc = xmlMapper.writeValueAsString(input);
+        IMyType767 result = xmlMapper.readValue(doc, IMyType767.class);
+
+        assertNotNull(result);
+        assertEquals(MyType767.class, result.getClass());
+        MyType767 typedResult = (MyType767) result;
+        assertEquals(Arrays.asList("type1", "type2"), typedResult.typeNames);
+    }
+
     // [dataformat-xml#567]
     @Test
     public void testPolyList567_3items() throws Exception {