Add failing test for FasterXML#1647

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

@@ -0,0 +1,32 @@
+package com.fasterxml.jackson.failing;
+
+import java.io.IOException;
+
+import com.fasterxml.jackson.annotation.JsonProperty;
+import com.fasterxml.jackson.databind.BaseMapTest;
+import com.fasterxml.jackson.databind.type.TypeFactory;
+
+
+// https://github.com/FasterXML/jackson-databind/issues/1647
+public class TestTypeFactoryWithRecursiveTypes extends BaseMapTest {
+
+	static interface IFace<T> {
+	}
+
+	static class Base implements IFace<Sub> {
+		@JsonProperty int base = 1;
+	}
+
+	static class Sub extends Base {
+		@JsonProperty int sub = 2;
+	}
+
+	public void testBasePropertiesIncludedWhenSerializingSubWhenSubTypeLoadedAfterBaseType() throws IOException {
+		TypeFactory tf = TypeFactory.defaultInstance();
+		tf.constructType(Base.class);
+		tf.constructType(Sub.class);
+		Sub sub = new Sub();
+		String serialized = objectMapper().writeValueAsString(sub);
+		assertEquals("{\"base\":1,\"sub\":2}", serialized);
+	}
+}