private static Table testTable(final File f, final String testentities, final boolean useTailCache, final boolean exceed134217727) throws IOException, RowSpaceExceededException {
if (f.exists()) FileUtils.deletedelete(f);
final Row rowdef = new Row("byte[] a-4, byte[] b-4", NaturalOrder.naturalOrder);
final Table tt = new Table(f, rowdef, 100, 0, useTailCache, exceed134217727);
byte[] b;
final Row.Entry row = rowdef.newEntry();
for (int i = 0; i < testentities.length(); i++) {
b = testWord(testentities.charAt(i));
row.setCol(0, b);
row.setCol(1, b);
tt.put(row);