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.common.utils;
  
  import com.alibaba.nacos.api.exception.runtime.NacosRuntimeException;
  import org.junit.jupiter.api.Test;
  
  import java.lang.reflect.Field;
  import java.util.Map;
  
  import static org.junit.jupiter.api.Assertions.assertEquals;
  import static org.junit.jupiter.api.Assertions.assertNotNull;
  import static org.junit.jupiter.api.Assertions.assertThrows;
  import static org.junit.jupiter.api.Assertions.assertTrue;
  
  class ClassUtilsTest {
      
      @Test
      void testFindClassByName1() {
          Class<?> clazz = ClassUtils.findClassByName("java.lang.Integer");
          assertEquals("java.lang.Integer", clazz.getName());
      }
      
      @Test
      void testFindClassByName2() {
          assertThrows(NacosRuntimeException.class, () -> {
              ClassUtils.findClassByName("not.exist.Class");
          });
      }
      
      @Test
      void testGetName() {
          final String name = "java.lang.Integer";
          Integer val = 1;
          assertEquals(name, ClassUtils.getName(val));
          assertEquals(name, ClassUtils.getName(Integer.class));
          
          assertEquals(name, ClassUtils.getCanonicalName(val));
          assertEquals(name, ClassUtils.getCanonicalName(Integer.class));
          
          assertEquals("Integer", ClassUtils.getSimpleName(val));
          assertEquals("Integer", ClassUtils.getSimpleName(Integer.class));
      }
      
      @Test
      void testIsAssignableFrom() {
          assertTrue(ClassUtils.isAssignableFrom(Object.class, Integer.class));
      }
      
      @Test
      void testForNameArray() throws ClassNotFoundException {
          Class clazz = ClassUtils.forName("[Lcom.alibaba.nacos.common.utils.ClassUtilsTest;", null);
          assertEquals("[Lcom.alibaba.nacos.common.utils.ClassUtilsTest;", clazz.getName());
          clazz = ClassUtils.forName("java.lang.String[]", null);
          assertEquals("[Ljava.lang.String;", clazz.getName());
          clazz = ClassUtils.forName("[[Ljava.lang.String;", null);
          assertEquals("[[Ljava.lang.String;", clazz.getName());
      }
      
      @Test
      void testForNameNonExist() throws ClassNotFoundException {
          assertThrows(ClassNotFoundException.class, () -> {
              ClassUtils.forName("com.alibaba.nacos.common.NonExistClass", null);
          });
      }
      
      @Test
      void testForNameFromPrimitive() throws NoSuchFieldException, IllegalAccessException, ClassNotFoundException {
          Field field = ClassUtils.class.getDeclaredField("PRIMITIVE_TYPE_NAME_MAP");
          field.setAccessible(true);
          Map<String, Class<?>> map = (Map<String, Class<?>>) field.get(null);
          map.put("Test", ClassUtilsTest.class);
          assertEquals(ClassUtilsTest.class, ClassUtils.forName("Test", null));
      }
      
      @Test
      void testGetDefaultClassLoader() {
          ClassLoader cachedClassLoader = Thread.currentThread().getContextClassLoader();
          try {
              Thread.currentThread().setContextClassLoader(null);
              assertNotNull(ClassUtils.getDefaultClassLoader());
          } finally {
              Thread.currentThread().setContextClassLoader(cachedClassLoader);
          }
      }
      
      @Test
      void testClassPackageAsResourcePath() throws ClassNotFoundException {
          Class noPackageClass = ClassUtils.forName("ClassUtilsTestMockClass", null);
          assertEquals("", ClassUtils.classPackageAsResourcePath(null));
          assertEquals("", ClassUtils.classPackageAsResourcePath(noPackageClass));
          assertEquals("com/alibaba/nacos/common/utils", ClassUtils.classPackageAsResourcePath(ClassUtilsTest.class));
      }
      
      @Test
      void testConvertClassNameAndClassPath() {
          String name = ClassUtilsTest.class.getName();
          assertEquals("com/alibaba/nacos/common/utils/ClassUtilsTest", ClassUtils.convertClassNameToResourcePath(name));
          assertEquals(name, ClassUtils.resourcePathToConvertClassName("com/alibaba/nacos/common/utils/ClassUtilsTest"));
      }
  }