Add a unit test for #921

src/test/java/com/fasterxml/jackson/failing/BuilderDeserializationTest921.java

@@ -0,0 +1,102 @@
+package com.fasterxml.jackson.failing;
+
+import java.util.List;
+
+import com.fasterxml.jackson.annotation.*;
+import com.fasterxml.jackson.core.type.TypeReference;
+import com.fasterxml.jackson.databind.*;
+import com.fasterxml.jackson.databind.annotation.JsonDeserialize;
+
+public class BuilderDeserializationTest921
+    extends BaseMapTest
+{
+    public static class MyPOJO {
+      public String x;
+      public String y;
+
+      @JsonCreator
+      public MyPOJO(@JsonProperty("x") String x, @JsonProperty("y") String y) {
+        this.x = x;
+        this.y = y;
+      }
+    }
+
+    @JsonDeserialize(builder = MyGenericPOJO.Builder.class)
+    public static class MyGenericPOJO<T> {
+      private List<T> data;
+
+      private MyGenericPOJO(List<T> d) {
+        data = d;
+      }
+
+      public List<T> getData() {
+        return data;
+      }
+
+      public static class Builder<T> {
+        private List<T> data;
+
+        public Builder<T> withData(List<T> d) {
+          data = d;
+          return this;
+        }
+
+        public MyGenericPOJO<T> build() {
+          return new MyGenericPOJO<T>(data);
+        }
+      }
+    }
+
+    public static class MyGenericPOJOWithCreator<T> {
+      private List<T> data;
+
+      private MyGenericPOJOWithCreator(List<T> d) {
+          data = d;
+      }
+
+      @JsonCreator
+      public static <T> MyGenericPOJOWithCreator<T> create(@JsonProperty("data") List<T> data) {
+          return new MyGenericPOJOWithCreator.Builder<T>().withData(data).build();
+      }
+
+      public List<T> getData() {
+          return data;
+      }
+
+      public static class Builder<T> {
+          private List<T> data;
+
+          public Builder<T> withData(List<T> d) {
+              data = d;
+              return this;
+          }
+
+          public MyGenericPOJOWithCreator<T> build() {
+              return new MyGenericPOJOWithCreator<T>(data);
+          }
+      }
+    }
+
+    public void testWithBuilder() throws Exception {
+      final ObjectMapper mapper = new ObjectMapper();
+      final String json = aposToQuotes("{ 'data': [ { 'x': 'x', 'y': 'y' } ] }");
+      final MyGenericPOJO<MyPOJO> deserialized =
+          mapper.readValue(json, new TypeReference<MyGenericPOJO<MyPOJO>>() {});
+      assertEquals(1, deserialized.data.size());
+      Object ob = deserialized.data.get(0);
+      assertNotNull(ob);
+      assertEquals(MyPOJO.class, ob.getClass());
+    }
+
+    public void testWithCreator() throws Exception {
+      final ObjectMapper mapper = new ObjectMapper();
+      final String json = aposToQuotes("{ 'data': [ { 'x': 'x', 'y': 'y' } ] }");
+      final MyGenericPOJOWithCreator<MyPOJO> deserialized =
+          mapper.readValue(json,
+                  new TypeReference<MyGenericPOJOWithCreator<MyPOJO>>() {});
+      assertEquals(1, deserialized.data.size());
+      Object ob = deserialized.data.get(0);
+      assertNotNull(ob);
+      assertEquals(MyPOJO.class, ob.getClass());
+    }
+  }