KotlinFileSystem emulates slow filesystem with high throughput. It contains methods

• getChildren(path) - returns names of files inside dir
• get(path) - returns file or directory by path
• createDirectory(path) - creates directory, if parent directory exists
• createFile(path, content) - creates file, if parent directory exists
• delete(path) - removes file, if it is file or empty directory

SlowFileSystem is blocking wrapper for KotlinFileSystem.

AsyncFileSystem is asynchronous wrapper for KotlinFileSystem.

You should

• implement CopyStrategy, which copies all filesystem from source to target.
• implement DeleteStrategy, which recursively deletes all files from filesystem.
• strategy should work as fast as possible and use as few as possible threads.