src/main/java/io/github/glytching/junit/extension/folder/TemporaryFolder.java
public File createDirectory(String directoryName) {
    Path path = Paths.get(rootFolder.getPath(), directoryName);
    try {
      return Files.createDirectory(path).toFile();
    } catch (IOException ex) {
      throw new TemporaryFolderException(
          String.format("Failed to create directory: '%s'", path.toString()), ex);
    }
  }
public File createDirectory(String directoryName) {
    Path path = Paths.get(rootFolder.getPath(), directoryName);
    try {
      return Files.createDirectory(path).toFile();
    } catch (IOException ex) {
      throw new TemporaryFolderException(
          String.format("Failed to create directory: '%s'", path.toString()), ex);
    }
  }
public File createDirectory ( String directoryName ) { Path path = Paths . get ( rootFolder . getPath ( ) , directoryName ) ; try { return Files . createDirectory ( path ) . toFile ( ) ; } catch ( IOException ex ) { throw new TemporaryFolderException ( String . format ( "Failed to create directory: '%s'" , path . toString ( ) ) , ex ) ; } }
Create a directory within the temporary folder root.

@param directoryName the name of the directory to be created
@return the directory instance
Create a directory within the temporary folder root .