Unit Testing Location Service

Question

I\'ve got a location tracking service that I\'m trying to unit test. I\'m trying to use the locationManager.addTestProvider and setTestProviderLocation methods to achieve this.

Answer 1

I was able to get @ingsaurabh's example working in a unit test after making the following modifications:

import java.io.IOException;
import java.io.OutputStreamWriter;
import java.io.Writer;
import java.net.Socket;
import java.net.UnknownHostException;

public final class TestLocationProvider {
    static void sendLocation(double latitude, double longitude) {
        try {
            Socket socket = new Socket("10.0.2.2", 5554); // usually 5554
            socket.setKeepAlive(true);
            String str = "geo fix " + longitude + " " + latitude ;
            Writer w = new OutputStreamWriter(socket.getOutputStream());
            w.write(str + "\r\n");
            w.flush();
        }
        catch (UnknownHostException e) {
            throw new RuntimeException(e);
        }
        catch (IOException e) {
            throw new RuntimeException(e);
        }
    }
}

The important detail is the IP address. The emulator does not recognize 'localhost' as a valid hostname.

Answer 2

Hi in my first GPS based project I faced the same problem so I write a java code that will send GPS Fix to my android emulator below is the snippet.

import java.io.IOException;
import java.io.PrintStream;
import java.net.Socket;
import java.net.UnknownHostException;

public class Main {

static final int PAUSE = 4000; // ms
static final float START_LONGITUDE = 51, START_LATITUDE = -1.3f;
static final int NO_SAMPLE = 100;
static final float DELTA_LONGITUDE = 0.000005f, DELTA_LADITUDE = 0.000005f;

public static void main(String[] args) {
    try {
        Socket socket = new Socket("localhost", 5554); // usually 5554

        PrintStream out = new PrintStream(socket.getOutputStream());
        float longitude = START_LONGITUDE, latitude = START_LATITUDE;
        String str;

        for (int i = 0; i < NO_SAMPLE; i++) {
            str = "geo fix " + latitude + " " + longitude + "\n";
            out.print(str);
            System.out.print(str);

            Thread.sleep(PAUSE);

            longitude += DELTA_LONGITUDE;
            latitude += DELTA_LADITUDE;
        }
    } catch (UnknownHostException e) {
        System.exit(-1);
    } catch (IOException e) {
        System.exit(-1);
    } catch (InterruptedException e) {
        System.exit(-1);
    }

    }
}