Add failing test for #164

avro/src/main/java/com/fasterxml/jackson/dataformat/avro/AvroMapper.java

@@ -147,7 +147,6 @@ public static AvroMapper.Builder xmlBuilder() {
     /**
      * @since 2.10
      */
-    @SuppressWarnings("unchecked")
     public static AvroMapper.Builder builder() {
         return new AvroMapper.Builder(new AvroMapper());
     }

avro/src/test/java/com/fasterxml/jackson/dataformat/avro/failing/POJOEvolution164Test.java

@@ -0,0 +1,58 @@
+package com.fasterxml.jackson.dataformat.avro.failing;
+
+import com.fasterxml.jackson.dataformat.avro.AvroMapper;
+import com.fasterxml.jackson.dataformat.avro.AvroSchema;
+import com.fasterxml.jackson.dataformat.avro.AvroTestBase;
+
+public class POJOEvolution164Test extends AvroTestBase
+{
+    static class MyClass {
+        public String stringField;
+        public long longField;
+    }
+
+    private final AvroMapper MAPPER = getMapper();
+
+    public void testBase() throws Exception
+    {
+        final String WRITER_SCHEMA_SRC = "{\n" +
+                "  \"type\": \"record\",\n" +
+                "  \"name\": \"MyClass\",\n" +
+                "  \"fields\": [\n" +
+                "    { \"name\": \"longField\", \"type\": \"long\"\n },\n" +
+                "    { \"name\": \"stringField\",\n" +
+                "      \"type\": [\n" +
+                "        \"null\",\n" +
+                "        \"string\"\n" +
+                "      ]\n" +
+                "    }\n" +
+                "  ]\n" +
+                "}";
+        final String READER_SCHEMA_SRC = "{\n" +
+                "  \"type\": \"record\",\n" +
+                "  \"name\": \"MyClass\",\n" +
+                "  \"fields\": [\n" +
+                "    {\"name\": \"stringField\",\n" +
+                "      \"type\": [\n" +
+                "        \"null\",\n" +
+                "        \"string\"\n" +
+                "      ]\n" +
+                "    }\n" +
+                "  ]\n" +
+                "}";
+
+        final AvroSchema readerSchema = MAPPER.schemaFrom(READER_SCHEMA_SRC);
+        final AvroSchema writerSchema = MAPPER.schemaFrom(WRITER_SCHEMA_SRC);
+
+        MyClass aClass = new MyClass();
+        aClass.stringField = "String value";
+        aClass.longField = 42;
+        byte[] avro = MAPPER.writer()
+                .with(writerSchema)
+                .writeValueAsBytes(aClass);
+        MyClass result = MAPPER.readerFor(MyClass.class)
+                .with(readerSchema)
+                .readValue(avro);
+        assertEquals(aClass.stringField, result.stringField);
+      }
+}