Try to add test for refcount

java/c/src/test/java/org/apache/arrow/c/RoundtripTest.java

@@ -33,6 +33,7 @@
 import java.util.Map;
 import java.util.UUID;
 import java.util.stream.Collectors;
+import java.util.stream.IntStream;
 import java.util.stream.Stream;
 
 import org.apache.arrow.memory.ArrowBuf;
@@ -164,10 +165,22 @@ VectorSchemaRoot vectorSchemaRootRoundtrip(VectorSchemaRoot root) {
   }
 
   boolean roundtrip(FieldVector vector, Class<?> clazz) {
+    List<ArrowBuf> fieldBuffers = vector.getFieldBuffers();
+    List<Int> orgRefCnts = fieldBuffers.map(buf -> buf.refCnt()).collect(Collectors.toList());
+
+    boolean result = false;
     try (ValueVector imported = vectorRoundtrip(vector)) {
       assertTrue(clazz.isInstance(imported), String.format("expected %s but was %s", clazz, imported.getClass()));
-      return VectorEqualsVisitor.vectorEquals(vector, imported);
+      result = VectorEqualsVisitor.vectorEquals(vector, imported);
     }
+
+    // Check that the ref counts of the buffers are the same after the roundtrip
+    IntStream.range(0, orgRefCnts.size()).forEach(i -> {
+      ArrowBuf buf = fieldBuffers.get(i);
+      assertEquals(buf.refCnt(), orgRefCnts.get(i));
+    });
+
+    return result;
   }
 
   @Test