@Test
 public void testTransform() {
   Config c = configFromString("rules { \"k1\" = \"v1\", \"k2(.)\" = \"v2$1\" } ");
   RegexSqlTransformer tr = new RegexSqlTransformer(c);
   assertEquals(2, tr.rules.size());
   assertEquals("k0", tr.transform("k0"));
   assertEquals("k0 v1 v21 v22 k31", tr.transform("k0 k1 k21 K22 k31"));
 }
  @Test
  public void testIsEnabled() {
    DBConfig dbc1 = dbConfig("dbc1", "url1");
    DBConfig dbc2 = dbConfig("dbc2", "url2");
    DBConfig dbc3 = dbConfig("dbc3", "url3");

    Config c1 = configFromString("rules {}");
    RegexSqlTransformer tr1 = new RegexSqlTransformer(c1);
    assertTrue(tr1.isEnabled(dbc1));
    assertTrue(tr1.isEnabled(dbc2));

    Config c2 = configFromString("urlFilter = \".*(1|2)\", urlNotFilter = \".*2\", rules {}");
    RegexSqlTransformer tr2 = new RegexSqlTransformer(c2);
    assertTrue(tr2.isEnabled(dbc1));
    assertFalse(tr2.isEnabled(dbc2));
    assertFalse(tr2.isEnabled(dbc3));
  }