content: /*
   * Copyright 1999-2023 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.naming.utils;
  
  import com.alibaba.nacos.client.utils.ConcurrentDiskUtil;
  import org.junit.jupiter.api.Test;
  
  import java.io.File;
  import java.io.IOException;
  import java.lang.reflect.InvocationTargetException;
  import java.lang.reflect.Method;
  import java.nio.ByteBuffer;
  import java.nio.channels.FileChannel;
  import java.nio.charset.StandardCharsets;
  
  import static org.junit.jupiter.api.Assertions.assertEquals;
  import static org.junit.jupiter.api.Assertions.assertFalse;
  import static org.junit.jupiter.api.Assertions.assertThrows;
  import static org.mockito.ArgumentMatchers.anyBoolean;
  import static org.mockito.ArgumentMatchers.anyLong;
  import static org.mockito.Mockito.mock;
  import static org.mockito.Mockito.when;
  
  class ConcurrentDiskUtilTest {
      
      @Test
      void testReadAndWrite() throws IOException {
          File tempFile = File.createTempFile("aaa", "bbb");
          String fileName = tempFile.getAbsolutePath();
          String content = "hello";
          String charset = "UTF-8";
          ConcurrentDiskUtil.writeFileContent(fileName, content, charset);
          String actualContent = ConcurrentDiskUtil.getFileContent(fileName, charset);
          assertEquals(content, actualContent);
      }
      
      @Test
      void testReadAndWrite2() throws IOException {
          File tempFile = File.createTempFile("aaa", "bbb");
          String content = "hello";
          String charset = "UTF-8";
          ConcurrentDiskUtil.writeFileContent(tempFile, content, charset);
          String actualContent = ConcurrentDiskUtil.getFileContent(tempFile, charset);
          assertEquals(content, actualContent);
      }
      
      @Test
      void testByteBufferToString() throws IOException {
          String msg = "test buff to string";
          ByteBuffer buff = ByteBuffer.wrap(msg.getBytes(StandardCharsets.UTF_8));
          String actual = ConcurrentDiskUtil.byteBufferToString(buff, "UTF-8");
          assertEquals(msg, actual);
      }
      
      @Test
      void testWriteFileContent() throws IOException {
          File file = mock(File.class);
          assertFalse(ConcurrentDiskUtil.writeFileContent(file, "hello", "UTF-8"));
      }
      
      @Test
      void testTryLockFailure() throws Throwable {
          assertThrows(IOException.class, () -> {
              Method method = ConcurrentDiskUtil.class.getDeclaredMethod("tryLock", File.class, FileChannel.class,
                      boolean.class);
              method.setAccessible(true);
              File file = new File("non-exist");
              FileChannel channel = mock(FileChannel.class);
              when(channel.tryLock(anyLong(), anyLong(), anyBoolean())).thenThrow(new RuntimeException());
              try {
                  method.invoke(null, file, channel, true);
              } catch (InvocationTargetException e) {
                  throw e.getCause();
              }
          });
      }
      
      @Test
      void testTryLockFailureForIntercept() throws Throwable {
          assertThrows(IOException.class, () -> {
              Method method = ConcurrentDiskUtil.class.getDeclaredMethod("tryLock", File.class, FileChannel.class,
                      boolean.class);
              method.setAccessible(true);
              File file = new File("non-exist");
              FileChannel channel = mock(FileChannel.class);
              Thread.currentThread().interrupt();
              when(channel.tryLock(anyLong(), anyLong(), anyBoolean())).thenThrow(new RuntimeException());
              try {
                  method.invoke(null, file, channel, true);
              } catch (InvocationTargetException e) {
                  throw e.getCause();
              }
          });
      }
  }