// Path: s3-vfs/src/test/java/org/pentaho/s3common/S3CommonFileSystemTestUtil.java
// public class S3CommonFileSystemTestUtil {
// 
//   public static S3CommonFileSystem stubRegionUnSet( S3CommonFileSystem fileSystem ) {
//     S3CommonFileSystem fileSystemSpy = Mockito.spy( fileSystem );
//     doReturn(false).when(fileSystemSpy).isRegionSet();
//     return fileSystemSpy;
//   }
// }


import com.amazonaws.regions.Regions;
import com.amazonaws.services.s3.AmazonS3Client;
import org.apache.commons.vfs2.FileSystemOptions;
import org.apache.commons.vfs2.FileType;
import org.apache.commons.vfs2.UserAuthenticator;
import org.apache.commons.vfs2.impl.DefaultFileSystemConfigBuilder;
import org.junit.Before;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.mockito.MockedStatic;
import org.mockito.Mockito;
import org.mockito.junit.MockitoJUnitRunner;
import org.pentaho.s3.vfs.S3FileName;
import org.pentaho.s3.vfs.S3FileNameTest;
import org.pentaho.s3common.S3CommonFileSystemTestUtil;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertNotNull;
import static org.mockito.Mockito.mock;
import static org.mockito.Mockito.when;
      FileType.FOLDER );
    fileSystem = new S3NFileSystem( fileName, new FileSystemOptions() );
  }


  @Test
  public void testCreateFile() throws Exception {
    assertNotNull( fileSystem.createFile( new S3FileName( "s3n", "bucketName", "/bucketName/key", FileType.FILE ) ) );
  }

  @Test
  public void testGetS3Service() throws Exception {
    assertNotNull( fileSystem.getS3Client() );

    FileSystemOptions options = new FileSystemOptions();
    UserAuthenticator authenticator = mock( UserAuthenticator.class );
    DefaultFileSystemConfigBuilder.getInstance().setUserAuthenticator( options, authenticator );

    fileSystem = new S3NFileSystem( fileName, options );
    assertNotNull( fileSystem.getS3Client() );
  }

  @Test
  public void getS3ClientWithDefaultRegion() {
    FileSystemOptions options = new FileSystemOptions();
    try ( MockedStatic<Regions> regionsMockedStatic = Mockito.mockStatic( Regions.class ) ) {
      regionsMockedStatic.when( Regions::getCurrentRegion ).thenReturn( null );
      //Not under an EC2 instance - getCurrentRegion returns null
      when( Regions.getCurrentRegion() ).thenReturn( null );
      fileSystem = new S3NFileSystem( fileName, options );
// Path: s3-vfs/src/test/java/org/pentaho/s3common/S3CommonFileSystemTestUtil.java
// public class S3CommonFileSystemTestUtil {
// 
//   public static S3CommonFileSystem stubRegionUnSet( S3CommonFileSystem fileSystem ) {
//     S3CommonFileSystem fileSystemSpy = Mockito.spy( fileSystem );
//     doReturn(false).when(fileSystemSpy).isRegionSet();
//     return fileSystemSpy;
//   }
// }


// Path: s3-vfs/src/test/java/org/pentaho/s3n/vfs/S3NFileSystemTest.java
import com.amazonaws.regions.Regions;
import com.amazonaws.services.s3.AmazonS3Client;
import org.apache.commons.vfs2.FileSystemOptions;
import org.apache.commons.vfs2.FileType;
import org.apache.commons.vfs2.UserAuthenticator;
import org.apache.commons.vfs2.impl.DefaultFileSystemConfigBuilder;
import org.junit.Before;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.mockito.MockedStatic;
import org.mockito.Mockito;
import org.mockito.junit.MockitoJUnitRunner;
import org.pentaho.s3.vfs.S3FileName;
import org.pentaho.s3.vfs.S3FileNameTest;
import org.pentaho.s3common.S3CommonFileSystemTestUtil;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertNotNull;
import static org.mockito.Mockito.mock;
import static org.mockito.Mockito.when;

      FileType.FOLDER );
    fileSystem = new S3NFileSystem( fileName, new FileSystemOptions() );
  }


  @Test
  public void testCreateFile() throws Exception {
    assertNotNull( fileSystem.createFile( new S3FileName( "s3n", "bucketName", "/bucketName/key", FileType.FILE ) ) );
  }

  @Test
  public void testGetS3Service() throws Exception {
    assertNotNull( fileSystem.getS3Client() );

    FileSystemOptions options = new FileSystemOptions();
    UserAuthenticator authenticator = mock( UserAuthenticator.class );
    DefaultFileSystemConfigBuilder.getInstance().setUserAuthenticator( options, authenticator );

    fileSystem = new S3NFileSystem( fileName, options );
    assertNotNull( fileSystem.getS3Client() );
  }

  @Test
  public void getS3ClientWithDefaultRegion() {
    FileSystemOptions options = new FileSystemOptions();
    try ( MockedStatic<Regions> regionsMockedStatic = Mockito.mockStatic( Regions.class ) ) {
      regionsMockedStatic.when( Regions::getCurrentRegion ).thenReturn( null );
      //Not under an EC2 instance - getCurrentRegion returns null
      when( Regions.getCurrentRegion() ).thenReturn( null );
      fileSystem = new S3NFileSystem( fileName, options );
      fileSystem = (S3NFileSystem) S3CommonFileSystemTestUtil.stubRegionUnSet( fileSystem );