@Override
  public void setInteger( long number ) {
    this.string = "" + number;
  }
@Test
  public void testSetInteger() {
    ValueString vs = new ValueString();

    vs.setInteger( -1L );
    assertEquals( "-1", vs.getString() );
    vs.setInteger( 0L );
    assertEquals( "0", vs.getString() );
    vs.setInteger( 1L );
    assertEquals( "1", vs.getString() );
  }