Add BigDecimal-related test (wrt holding precision)

Author: cowtowncoder

src/test/java/com/fasterxml/jackson/dataformat/xml/deser/NumberDeserWithXMLTest.java

@@ -0,0 +1,88 @@
+package com.fasterxml.jackson.dataformat.xml.deser;
+
+import java.math.BigDecimal;
+
+import com.fasterxml.jackson.annotation.JsonProperty;
+import com.fasterxml.jackson.annotation.JsonRootName;
+import com.fasterxml.jackson.annotation.JsonSubTypes;
+import com.fasterxml.jackson.annotation.JsonTypeInfo;
+import com.fasterxml.jackson.annotation.JsonUnwrapped;
+
+import com.fasterxml.jackson.databind.ObjectMapper;
+import com.fasterxml.jackson.dataformat.xml.XmlMapper;
+import com.fasterxml.jackson.dataformat.xml.XmlTestBase;
+
+// Tests copied from databind "JDKNumberDeserTest" (only a small subset)
+public class NumberDeserWithXMLTest extends XmlTestBase
+{
+    // [databind#2644]
+    @JsonRootName("Root")
+    static class NodeRoot2644 {
+        public String type;
+
+        @JsonTypeInfo(use = JsonTypeInfo.Id.NAME, include = JsonTypeInfo.As.EXTERNAL_PROPERTY, property = "type")
+        @JsonSubTypes(value = {
+                @JsonSubTypes.Type(value = NodeParent2644.class, name = "NodeParent")
+        })
+        public Node2644 node;
+    }
+
+    public static class NodeParent2644 extends Node2644 { }
+
+    public static abstract class Node2644 {
+        @JsonProperty("amount")
+        BigDecimal val;
+
+        public BigDecimal getVal() {
+            return val;
+        }
+
+        public void setVal(BigDecimal val) {
+            this.val = val;
+        }
+    }
+
+    // [databind#2784]
+    static class BigDecimalHolder2784 {
+        public BigDecimal value;
+    }
+
+    @JsonRootName("Nested")
+    static class NestedBigDecimalHolder2784 {
+        @JsonUnwrapped
+        public BigDecimalHolder2784 holder;
+    }
+
+    /*
+    /**********************************************************************
+    /* Test methods
+    /**********************************************************************
+     */
+
+    private final XmlMapper MAPPER = newMapper();
+
+    // [databind#2644]
+    public void testBigDecimalSubtypes() throws Exception
+    {
+        ObjectMapper mapper = mapperBuilder()
+                .registerSubtypes(NodeParent2644.class)
+                .build();
+        NodeRoot2644 root = mapper.readValue("<Root>\n"
+                +"<type>NodeParent</type>"
+                +"<node><amount>9999999999999999.99</amount></node>\n"
+                +"</Root>\n",
+                NodeRoot2644.class
+        );
+
+        assertEquals(new BigDecimal("9999999999999999.99"), root.node.getVal());
+    }
+
+    // [databind#2784]
+    public void testBigDecimalUnwrapped() throws Exception
+    {
+        // mapper.enable(DeserializationFeature.USE_BIG_DECIMAL_FOR_FLOATS);
+        final String DOC = "<Nested><value>5.00</value></Nested>";
+        NestedBigDecimalHolder2784 result = MAPPER.readValue(DOC, NestedBigDecimalHolder2784.class);
+        assertEquals(new BigDecimal("5.00"), result.holder.value);
+    }
+}