Use robolectric for unit tests

app/build.gradle

@@ -30,4 +30,5 @@ android {
 
 dependencies {
     testCompile 'junit:junit:4.12'
+    testCompile "org.robolectric:robolectric:3.0"
 }

app/src/main/java/org/traccar/client/RequestManager.java

@@ -15,17 +15,68 @@
  */
 package org.traccar.client;
 
+import android.os.AsyncTask;
+
+import java.io.IOException;
+import java.io.InputStream;
+import java.net.HttpURLConnection;
+import java.net.URL;
+
 public class RequestManager {
 
+    private static final int TIMEOUT = 15 * 1000;
+
     public interface RequestHandler {
         void onSuccess();
         void onFailure();
     }
 
+    private static class RequestAsyncTask extends AsyncTask<String, Void, Boolean> {
+
+        private RequestHandler handler;
+
+        public RequestAsyncTask(RequestHandler handler) {
+            this.handler = handler;
+        }
+
+        @Override
+        protected Boolean doInBackground(String... request) {
+            InputStream inputStream = null;
+            try {
+                URL url = new URL(request[0]);
+                HttpURLConnection connection = (HttpURLConnection) url.openConnection();
+                connection.setReadTimeout(TIMEOUT);
+                connection.setConnectTimeout(TIMEOUT);
+                connection.connect();
+                inputStream = connection.getInputStream();
+                while (inputStream.read() != -1);
+                return true;
+            } catch (IOException error) {
+                return false;
+            } finally {
+                try {
+                    if (inputStream != null) {
+                        inputStream.close();
+                    }
+                } catch (IOException secondError) {
+                    return false;
+                }
+            }
+        }
+
+        @Override
+        protected void onPostExecute(Boolean result) {
+            if (result) {
+                handler.onSuccess();
+            } else {
+                handler.onFailure();
+            }
+        }
+    }
+
     public static void sendRequest(String request, RequestHandler handler) {
-
-        handler.onSuccess();
-
+        RequestAsyncTask task = new RequestAsyncTask(handler);
+        task.execute(request);
     }
 
 }

app/src/test/java/org/traccar/client/RequestManagerTest.java

@@ -1,28 +1,32 @@
 
 package org.traccar.client;
 
+import junit.framework.Assert;
+
 import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.robolectric.RobolectricGradleTestRunner;
+import org.robolectric.annotation.Config;
 
-import static org.junit.Assert.assertNull;
+import java.lang.Override;
 
+@RunWith(RobolectricGradleTestRunner.class)
+@Config(constants = BuildConfig.class, sdk = 21)
 public class RequestManagerTest {
 
     @Test
     public void testSendRequest() throws Exception {
 
-        assertNull(null);
-
-        //ApelProtocolDecoder decoder = new ApelProtocolDecoder(new ApelProtocol());
-
-        /*byte[] buf1 = {0x40,0x4E,0x54,0x43,0x01,0x00,0x00,0x00,0x7B,0x00,0x00,0x00,0x13,0x00,0x44,0x34,0x2A,0x3E,0x53,0x3A,0x38,0x36,0x31,0x37,0x38,0x35,0x30,0x30,0x35,0x32,0x30,0x35,0x30,0x37,0x39};
-        assertNull(decoder.decode(null, null, ChannelBuffers.wrappedBuffer(ByteOrder.LITTLE_ENDIAN, buf1)));*/
-
-        //0c002900f12a00000f003235303032363533343135313036340f0033353638393530333632373938313101002000000000
-        //5c00380046e6a95136b693277f11b41a00172709f2ff03160002b9bc630007000000000000000000000000000000c31071090000880500000000000000000000
-        //5c00380072e7a95136b693277f11b41a00172709f2ff03160002b9bc630007000000000000000000000000000000c31071090000880500000000000000000000
-
-        //7900040069ea030000000000
-        //8300c20003006aea03005c003800223aab5107a393276617b41a0030d506e3000414010250bf630007000000000000000000000000000000c3107209000089050000000000006bea03005c003800403aab5107a393276617b41a0030d506e3000414010250bf630007000000000000000000000000000000c3107209000089050000000000006cea03005c0038005e3aab5107a393276617b41a0030d506e3000414010250bf630007000000000000000000000000000000c31072090000890500000000000000000000
+        RequestManager.sendRequest("http://www.google.com", new RequestManager.RequestHandler() {
+            @Override
+            public void onSuccess() {
+                Assert.assertTrue(true);
+            }
+            @Override
+            public void onFailure() {
+                Assert.assertTrue(false);
+            }
+        });
 
     }