Failing unit test for issue FasterXML#242

src/test/java/com/fasterxml/jackson/dataformat/xml/failing/TestTypeAttributeOrder.java

@@ -0,0 +1,56 @@
+package com.fasterxml.jackson.dataformat.xml.failing;
+
+import com.fasterxml.jackson.annotation.JsonSubTypes;
+import com.fasterxml.jackson.annotation.JsonTypeInfo;
+import com.fasterxml.jackson.dataformat.xml.XmlMapper;
+import com.fasterxml.jackson.dataformat.xml.annotation.JacksonXmlElementWrapper;
+import com.fasterxml.jackson.dataformat.xml.annotation.JacksonXmlProperty;
+import org.junit.Test;
+
+import java.util.List;
+
+import static org.junit.Assert.assertEquals;
+
+/**
+ * Issue #242
+ */
+public class TestTypeAttributeOrder {
+    @JsonTypeInfo(use = JsonTypeInfo.Id.NAME, include = JsonTypeInfo.As.PROPERTY, property = "type", defaultImpl = B.class)
+    @JsonSubTypes({
+            @JsonSubTypes.Type(value = B.class, name = "B")
+    })
+    static abstract class A {
+        @JacksonXmlProperty(isAttribute = true)
+        public Integer id;
+    }
+
+    static class Attr {
+        @JacksonXmlElementWrapper(useWrapping = false)
+        public List<Param> param;
+    }
+
+    static class Param {
+        public String name;
+    }
+
+    static class B extends A {
+        public Attr attr;
+    }
+
+    /*
+    /**********************************************************
+    /* Unit tests
+    /**********************************************************
+    */
+    private final XmlMapper MAPPER = new XmlMapper();
+
+    @Test
+    public void testAttributeOrder() throws Exception {
+        String content1 = "<A type=\"B\" id=\"1\"><attr><param name=\"1\"/><param name=\"2\"/></attr></A>";
+        B b1 = (B) MAPPER.readValue(content1, A.class);
+        assertEquals(2, b1.attr.param.size());
+        String content2 = "<A id=\"1\" type=\"B\"><attr><param name=\"1\"/><param name=\"2\"/></attr></A>";
+        B b2 = (B) MAPPER.readValue(content2, A.class);
+        assertEquals(2, b2.attr.param.size());
+    }
+}