content: /*
   * Copyright 2021-2022 Alibaba Group Holding Ltd.
   *
   *    Licensed under the Apache License, Version 2.0 (the "License");
   *    you may not use this file except in compliance with the License.
   *    You may obtain a copy of the License at
   *
   *      http://www.apache.org/licenses/LICENSE-2.0
   *
   *    Unless required by applicable law or agreed to in writing, software
   *    distributed under the License is distributed on an "AS IS" BASIS,
   *    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   *    See the License for the specific language governing permissions and
   *    limitations under the License.
   */
  
  package com.aliyun.fastmodel.core.tree.util;
  
  import java.util.List;
  
  import com.aliyun.fastmodel.core.tree.expr.Identifier;
  import org.junit.Test;
  
  import static org.junit.Assert.assertEquals;
  import static org.junit.Assert.assertTrue;
  
  /**
   * Desc:
   *
   * @author panguanjing
   * @date 2021/6/21
   */
  public class IdentifierUtilTest {
  
      @Test
      public void testIdentifier() {
          String code = "SYS_(dim_shop,dim_table)";
          Identifier identifier = new Identifier(code);
          List<Identifier> identifiers = IdentifierUtil.extractColumns(identifier);
          assertEquals(identifiers.get(0).getValue(), "dim_shop");
          assertEquals(identifiers.get(1).getValue(), "dim_table");
      }
  
      @Test
      public void testLower() {
          String code = "sys_test1234";
          Identifier identifier = new Identifier(code);
          assertTrue(IdentifierUtil.isSysIdentifier(identifier));
          code = "SYS_TEST1234";
          identifier = new Identifier(code);
          assertTrue(IdentifierUtil.isSysIdentifier(identifier));
      }
  
      @Test
      public void testDelimited() {
          String abc = IdentifierUtil.delimit("abc");
          assertEquals("`abc`", abc);
  
          abc = IdentifierUtil.delimit("`abc`");
          assertEquals("`abc`", abc);
  
          abc = IdentifierUtil.delimit("");
          assertEquals("", abc);
      }
  }