add test files

AbstractTest.java

+package com.javacodegeeks.nio.large_file_transfer;
+
+import static org.junit.Assert.assertEquals;
+
+import java.io.File;
+import java.io.IOException;
+import java.nio.file.Files;
+
+import org.junit.AfterClass;
+import org.junit.Before;
+import org.junit.BeforeClass;
+
+public abstract class AbstractTest {
+
+    protected static final String SRC = "/tmp/input.tar.gz";
+    protected static final String TARGET = "/tmp/output";
+    protected static final long AWAIT_TEST_COMPLETE = 20000l;
+
+    protected File srcFile;
+    protected File targetFile;
+
+    @BeforeClass
+    public static void init() {
+        Thread.currentThread().getContextClassLoader().setDefaultAssertionStatus(true);
+    }
+
+    @AfterClass
+    public static void destroy() {
+        Thread.currentThread().getContextClassLoader().setDefaultAssertionStatus(false);
+    }
+
+    @Before
+    public void setUp() throws IOException {
+        this.srcFile = new File(SRC);
+        this.targetFile = new File(TARGET + "/" + this.srcFile.getName());
+
+        Files.deleteIfExists(this.targetFile.toPath());
+    }
+
+    protected final void compare() {
+        assertEquals("file did not copy completely", this.srcFile.length(), this.targetFile.length());
+    }
+}

FileCopyTest.java

+package com.javacodegeeks.nio.large_file_transfer.remote;
+
+import java.io.IOException;
+import java.util.concurrent.CountDownLatch;
+
+import org.junit.Test;
+
+import com.javacodegeeks.nio.large_file_transfer.AbstractTest;
+
+public class FileCopyTest extends AbstractTest {
+
+    private static final int PORT = 9999;
+
+    @Test
+    public void copyLargeFile() throws IOException, InterruptedException {
+        final CountDownLatch latch = new CountDownLatch(1);
+        final FileReceiver receiver = new FileReceiver(PORT, new FileWriter(TARGET + "/" + super.srcFile.getName()), super.srcFile.length());
+
+        new Thread() {
+            public void run() {
+                try {
+                    receiver.receive();
+                } catch (IOException e) {
+
+                } finally {
+                    latch.countDown();
+                }
+            }
+        }.start();
+
+        final FileReader reader = new FileReader(new FileSender(PORT), SRC);
+        reader.read();
+
+        latch.await();
+        compare();
+    }   
+}