content: /*
   * Copyright 1999-2018 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.alibaba.nacos.client.utils;
  
  import com.alibaba.nacos.common.utils.StringUtils;
  import org.junit.jupiter.api.Test;
  
  import java.util.ArrayList;
  import java.util.Collection;
  
  import static com.alibaba.nacos.common.utils.StringUtils.defaultIfEmpty;
  import static com.alibaba.nacos.common.utils.StringUtils.isNotBlank;
  import static com.alibaba.nacos.common.utils.StringUtils.isNotEmpty;
  import static com.alibaba.nacos.common.utils.StringUtils.join;
  import static com.alibaba.nacos.common.utils.StringUtils.substringBetween;
  import static org.junit.jupiter.api.Assertions.assertEquals;
  import static org.junit.jupiter.api.Assertions.assertFalse;
  import static org.junit.jupiter.api.Assertions.assertNull;
  import static org.junit.jupiter.api.Assertions.assertTrue;
  
  class StringUtilsTest {
      
      @Test
      void testisNotBlank() {
          assertTrue(isNotBlank("foo"));
          
          assertFalse(isNotBlank(" "));
          assertFalse(isNotBlank(null));
      }
      
      @Test
      void testIsNotEmpty() {
          assertFalse(isNotEmpty(""));
          
          assertTrue(isNotEmpty("foo"));
      }
      
      @Test
      void testDefaultIfEmpty() {
          assertEquals("foo", defaultIfEmpty("", "foo"));
          assertEquals("bar", defaultIfEmpty("bar", "foo"));
      }
      
      @Test
      void testEquals() {
          assertTrue(StringUtils.equals("foo", "foo"));
          
          assertFalse(StringUtils.equals("bar", "foo"));
          assertFalse(StringUtils.equals(" ", "foo"));
          assertFalse(StringUtils.equals("foo", null));
      }
      
      @Test
      void testSubstringBetween() {
          assertNull(substringBetween(null, null, null));
          assertNull(substringBetween("", "foo", ""));
          assertNull(substringBetween("foo", "bar", "baz"));
          
          assertEquals("", substringBetween("foo", "foo", ""));
      }
      
      @Test
      void testJoin() {
          assertNull(join(null, ""));
          
          Collection collection = new ArrayList();
          collection.add("foo");
          collection.add("bar");
          assertEquals("foo,bar", join(collection, ","));
      }
  
      @Test
      void testUuidPattern() {
          // match 8-4-4-4-12 uuid pattern
          assertTrue(StringUtils.isUuidString("123e4567-e89b-12d3-a456-426655440000"));
          // not match 8-4-4-4-12 uuid pattern
          assertFalse(StringUtils.isUuidString("123e54567-e89b5-12d35-a4565-426655440000"));
          // not match hexadecimal and '-' char
          assertFalse(StringUtils.isUuidString("@23e4567+e89b-12d3-a456-426655440000"));
      }
  }
  