Android testing of Activities: first experiments.

Below an initial example of Activity testcase in Android. A first experiment after reading the android development page on Activity Testing.

The GuessPictureActivity is connected to a simple screen containing a TextView and ImageView. When the image is 'Clicked' a name will be displayed. On the next click a new photo will be loaded.



The activity under test is:
package com.ben.android.xmlweb;

import java.util.HashMap;

import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.ImageView;
import android.widget.TextView;

public class GuessPictureActivity extends Activity {
   
    private TextView textFaceName;
    private ImageView imageView;
    private HashMap<String,Integer> drawingsByName;
    private int counter;
    static final String LOGID = "FaceMemory";
    private String names[];
    private Boolean guessed;
               
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
       
        drawingsByName = new HashMap<String, Integer>();               
        drawingsByName.put("Pip", new Integer(R.drawable.pip));
        drawingsByName.put("The Stig", new Integer(R.drawable.stig));
        drawingsByName.put("Tux",new Integer(R.drawable.tux));
        names = new String[drawingsByName.size()];
        drawingsByName.keySet().toArray(names);
        counter = 0;
        guessed = false;
               
        textFaceName = (TextView)findViewById(R.id.textFaceName);       
        imageView= (ImageView)findViewById(R.id.imageView);
       
        imageView.setOnClickListener( new OnClickListener() {
            @Override
            public void onClick(View v) {   
                if(!guessed) {
                    textFaceName.setText(names[counter]);
                    guessed = true;
                } else {
                    counter++;
                    if(counter>=names.length) counter = 0;
                    imageView.setImageResource(drawingsByName.get(names[counter]));
                    textFaceName.setText(R.string.textGuessName);
                    guessed = false;
                }                           
            }
        });
    }
}

The activity test case looks like: 
package com.ben.android.xmlweb.test;

import com.ben.android.xmlweb.GuessPictureActivity;

import android.graphics.drawable.Drawable;
import android.os.Bundle;
import android.test.ActivityInstrumentationTestCase2;
import android.test.UiThreadTest;
import android.widget.ImageView;
import android.widget.TextView;

public class GuessPictureActivityTest extends ActivityInstrumentationTestCase2<GuessPictureActivity> {
    private GuessPictureActivity activity;
    private ImageView imageView;
    private TextView textView;
    private String guessWhoString;
   
           
    public GuessPictureActivityTest() {
        super("com.ben.android.xmlweb.XmlGetter", GuessPictureActivity.class);
    }
   
    @Override
    protected void setUp() throws Exception {       
        super.setUp();
       
        activity = getActivity();
        imageView = (ImageView)getActivity().findViewById(com.ben.android.xmlweb.R.id.imageView);
        textView = (TextView)getActivity().findViewById(com.ben.android.xmlweb.R.id.textFaceName);
        guessWhoString = activity.getResources().getString(com.ben.android.xmlweb.R.string.textGuessName);
    }
   
    @Override
    protected void tearDown() throws Exception {
        super.tearDown();
    }

    @UiThreadTest
    public void testAfterStartAQuestionIsAsked() {
        assertNotNull(imageView);
        assertNotNull(textView);
        assertEquals(guessWhoString,textView.getText());
    }   
   
    public void testOnClickTheNameOfPipIsDisplayed() throws InterruptedException{
        Drawable initialDrawable = imageView.getDrawable();
        activity.runOnUiThread(new Runnable() {
            @Override
            public void run() {
                imageView.performClick();
            }
        });
       
        getInstrumentation().waitForIdleSync();               
        String expectedText = "Pip";       
        assertEquals(expectedText,textView.getText());
        assertSame(initialDrawable, imageView.getDrawable());   
    }
   
    public void testOnTwoClicksADifferentImageIsDisplayed() {
        Drawable initialDrawable = imageView.getDrawable();
        activity.runOnUiThread(new Runnable() {
            @Override
            public void run() {
                imageView.performClick();
                imageView.performClick();
            }
        });
       
        getInstrumentation().waitForIdleSync();               
        assertEquals(guessWhoString,textView.getText());
        assertNotSame(initialDrawable, imageView.getDrawable());
    }
}
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