AndroidTest.java

package com.pringstudio.cobaandroidtest;

import android.test.ActivityInstrumentationTestCase2;
import android.test.TouchUtils;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;

/**
 * Created by sucipto on 4/14/16.
 */
public class MainActivityTest extends ActivityInstrumentationTestCase2<MainActivity>{

    public MainActivityTest(){
        super(MainActivity.class);
    }

    // Test activity
    public void testActivityExists(){
        MainActivity activity = getActivity();
        assertNotNull(activity);
    }

    // Test input
    public void testHello(){

        String testString = "Sucipto";

        MainActivity activity = getActivity();

        // Send Text to edittext
        final EditText editText = (EditText) activity.findViewById(R.id.editText);

        getInstrumentation().runOnMainSync(new Runnable() {
            @Override
            public void run() {
                editText.requestFocus();
            }
        });

        getInstrumentation().waitForIdleSync();
        getInstrumentation().sendStringSync(testString);
        getInstrumentation().waitForIdleSync();

        // Touch The Button
        Button button = (Button) activity.findViewById(R.id.button);
        TouchUtils.clickView(this, button);


        // Verify The Result
        TextView textView = (TextView) activity.findViewById(R.id.textView);
        String textResult = textView.getText().toString();
        assertEquals("Hello, "+testString+"!",textResult);
    }
}