Adds a couple of unit tests for the browser

browser/src/test/java/PingTest.java

@@ -0,0 +1,76 @@
+import static org.junit.Assert.assertEquals;
+
+import org.junit.AfterClass;
+import org.junit.BeforeClass;
+import org.junit.Test;
+
+import java.io.IOException;
+import java.util.ArrayList;
+import java.util.concurrent.ExecutionException;
+import java.util.concurrent.Future;
+
+import edu.regis.universeplayer.NumberPing;
+import edu.regis.universeplayer.browser.Browser;
+import edu.regis.universeplayer.browserCommands.CommandReturn;
+
+public class PingTest
+{
+    @BeforeClass
+    public static void setupBrowser() throws IOException, InterruptedException
+    {
+        System.out.println("Creating browser");
+        Browser.createBrowser();
+        System.out.println("Browser created");
+        if (Browser.getInstance() == null)
+        {
+            Browser.waitInstance();
+        }
+        Thread thread = new Thread(Browser.getInstance());
+        thread.start();
+        System.out.println("Browser fully initialized");
+    }
+
+    @AfterClass
+    public static void closeBrowser() throws IOException, InterruptedException
+    {
+        Browser.getInstance().stop();
+        System.out.println("Browser closed");
+    }
+
+    @Test
+    public void testPing() throws IOException, InterruptedException, ExecutionException
+    {
+        ArrayList<Future<Object>> futures = new ArrayList<>();
+        for (int i = 0; i < 3; i++)
+        {
+            futures.add(Browser.getInstance().sendObject("ping"));
+        }
+        System.out.println("Pings sent");
+        for (int i = 0; i < futures.size(); i++)
+        {
+            assertEquals("pong",
+                    ((CommandReturn<String>) futures.get(i).get())
+                            .getReturnValue());
+        }
+        System.out.println("Objects received");
+    }
+
+    @Test
+    public void testNumPing() throws IOException, InterruptedException,
+            ExecutionException
+    {
+        ArrayList<Future<Object>> futures = new ArrayList<>();
+        for (int i = 0; i < 3; i++)
+        {
+            futures.add(Browser.getInstance().sendObject(new NumberPing(i)));
+        }
+        System.out.println("Numbered pings sent");
+        for (int i = 0; i < futures.size(); i++)
+        {
+            assertEquals(i,
+                    ((CommandReturn<Double>) futures.get(i).get())
+                            .getReturnValue(), 0.001);
+        }
+        System.out.println("Objects received");
+    }
+}