content: /*
   * Licensed to the Apache Software Foundation (ASF) under one or more
   * contributor license agreements.  See the NOTICE file distributed with
   * this work for additional information regarding copyright ownership.
   * The ASF licenses this file to You 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 org.apache.carbondata.common;
  
  import org.junit.Assert;
  import org.junit.Test;
  
  public class StringsSuite {
  
    @Test(expected = NullPointerException.class)
    public void testMkStringNullString() {
      Strings.mkString(null, ",");
    }
  
    @Test(expected = NullPointerException.class)
    public void testMkStringNullDelimiter() {
      Strings.mkString(new String[]{"abc"}, null);
    }
    
    @Test
    public void testMkString() {
      String[] strings = new String[]{};
      String output = Strings.mkString(strings, ",");
      Assert.assertEquals(0, output.length());
  
      strings = new String[]{"abc"};
      output = Strings.mkString(strings, ",");
      Assert.assertEquals("abc", output);
  
      strings = new String[]{"abc", "def"};
      output = Strings.mkString(strings, ",");
      Assert.assertEquals("abc,def", output);
  
      strings = new String[]{"abc", "def", "ghj"};
      output = Strings.mkString(strings, ",");
      Assert.assertEquals("abc,def,ghj", output);
    }
  }
  