Add a failing test for #1559

src/test/java/com/fasterxml/jackson/databind/struct/TestUnwrappedWithPrefix.java

@@ -137,17 +137,15 @@ static class Child {
     static class SubChild {
         public String value;
     }
-
-    // // // Reuse mapper to keep tests bit faster
-
-    private final ObjectMapper MAPPER = new ObjectMapper();
 
     /*
     /**********************************************************
     /* Tests, serialization
     /**********************************************************
      */
 
+    private final ObjectMapper MAPPER = new ObjectMapper();
+
     public void testPrefixedUnwrappingSerialize() throws Exception
     {
         assertEquals("{\"name\":\"Tatu\",\"_x\":1,\"_y\":2}",

src/test/java/com/fasterxml/jackson/failing/UnwrappedWithView1559Test.java

@@ -0,0 +1,32 @@
+package com.fasterxml.jackson.failing;
+
+import com.fasterxml.jackson.annotation.JsonInclude;
+import com.fasterxml.jackson.annotation.JsonUnwrapped;
+import com.fasterxml.jackson.databind.*;
+
+public class UnwrappedWithView1559Test extends BaseMapTest
+{
+    @JsonInclude(JsonInclude.Include.NON_EMPTY)
+    static final class Health {
+        @JsonUnwrapped
+        public Status status;
+    }
+
+    // NOTE: `final` is required to trigger [databind#1559]
+    static final class Status {
+        public String code;
+    }
+
+    /*
+    /**********************************************************
+    /* Tests methods
+    /**********************************************************
+     */
+
+    // for [databind#1559]
+    public void testCanSerializeSimpleWithDefaultView() throws Exception {
+        String json = new ObjectMapper().configure(MapperFeature.DEFAULT_VIEW_INCLUSION, false)
+                .writeValueAsString(new Health());
+        assertEquals(aposToQuotes("{'status':null}"), json);
+    }
+}