Reuse package-private constant

Author: garydgregory

src/test/java/org/apache/commons/codec/digest/DigestUtilsTest.java

@@ -56,7 +56,7 @@ public class DigestUtilsTest {
 
     private static final String EMPTY_STRING = "";
 
-    private final byte[] testData = new byte[1024 * 1024];
+    private final byte[] testData = new byte[DigestUtils.BUFFER_SIZE * DigestUtils.BUFFER_SIZE];
 
     private Path testFile;