@Test
  public void test2() {
    Rule rule = LevelInequalityRule.getRule("~", "iNfO");
    AssertJUnit.assertNull(rule);
  }
Tests construction when operator is unrecognized.
olv-core/src/test/java/pl/otros/logview/accept/query/org/apache/log4j/rule/LevelInequalityRuleTest.java