make method name more unique

block-storage/src/test/java/org/lucares/pdb/blockstorage/BSFileTest.java

@@ -51,13 +51,13 @@ public class BSFileTest {
                 blockOffset = bsFile.getRootBlockOffset();
 
                 for (long i = 0; i < numLongs / 2; i++) {
-                    bsFile.append(i);
+                    bsFile.appendSingleValue(i);
                 }
             }
             try (final BSFile bsFile = BSFile.existingFile(blockOffset, ds, NullCustomizer.INSTANCE)) {
 
                 for (long i = numLongs / 2; i < numLongs; i++) {
-                    bsFile.append(i);
+                    bsFile.appendSingleValue(i);
                 }
             }
         }
@@ -98,7 +98,7 @@ public class BSFileTest {
                             // will produce 1,2 and 3 byte sequences when encoded
                             final long value = random.nextLong(32768);
                             listOfValues.add(value);
-                            bsFile.append(value);
+                            bsFile.appendSingleValue(value);
                         }
                         expected.put(bsFile.getRootBlockOffset(), listOfValues);
                     }