TestUtils.java

package org.deeplearning4j.streaming.embedded;

import java.io.File;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.net.ServerSocket;
import java.util.Random;

public class TestUtils {
    private static final Random RANDOM = new Random();

    private TestUtils() {}

    public static File constructTempDir(String dirPrefix) {
        File file = new File(System.getProperty("java.io.tmpdir"), dirPrefix + RANDOM.nextInt(10000000));
        if (!file.mkdirs()) {
            throw new RuntimeException("could not create temp directory: " + file.getAbsolutePath());
        }
        file.deleteOnExit();
        return file;
    }

    public static int getAvailablePort() {
        try {
            ServerSocket socket = new ServerSocket(0);
            try {
                return socket.getLocalPort();
            } finally {
                socket.close();
            }
        } catch (IOException e) {
            throw new IllegalStateException("Cannot find available port: " + e.getMessage(), e);
        }
    }

    public static boolean deleteFile(File path) throws FileNotFoundException {
        if (!path.exists()) {
            throw new FileNotFoundException(path.getAbsolutePath());
        }
        boolean ret = true;
        if (path.isDirectory()) {
            for (File f : path.listFiles()) {
                ret = ret && deleteFile(f);
            }
        }
        return ret && path.delete();
    }
}