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Android unit testing example 

freyo
Joined:
07/27/2010
Posts:
128

September 08, 2011 07:45:35    Last update: September 08, 2011 13:22:13
  1. Activity test:
    • AndroidManifest.xml: 
      <?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
      package="com.example.android.test"
      android:versionCode="1"
      android:versionName="1.0">
    <uses-sdk android:minSdkVersion="8" />
    <instrumentation android:targetPackage="com.example.android" android:name="android.test.InstrumentationTestRunner" />
    <application android:icon="@drawable/icon" android:label="@string/app_name">

    <uses-library android:name="android.test.runner" />
    </application>
</manifest>

    • Test code: 
      package com.example.android.test;

import com.example.android.FirstScreen;
import android.test.ActivityInstrumentationTestCase2;
import android.widget.TextView;
import android.util.Log;

public class FirstAndroidTest extends
	     ActivityInstrumentationTestCase2<FirstScreen> {
	
    private static final String TAG = "FirstAndroidTest";
	
    private FirstScreen mActivity;
    private TextView mView;
    private String resourceString;

    public FirstAndroidTest() {
	super("com.example.android", FirstScreen.class);
    }
	
    @Override
    protected void setUp() throws Exception {
    	Log.d(TAG, "setUp");
        super.setUp();
        mActivity = this.getActivity();
        mView = (TextView) mActivity.findViewById(com.example.android.R.id.hello);
        resourceString = mActivity.getString(com.example.android.R.string.hello);
    }
    
    @Override
    protected void tearDown() throws Exception {
    	Log.d(TAG, "tearDown");
    	super.tearDown();
    }
    
    public void testA() {
    	Log.d(TAG, "Running testA");
    	assertNull(resourceString);
    }
    
    public void testPreconditions() {
    	Log.d(TAG, "Running testPreconditions");
        assertNotNull(mView);
    }
    
    public void testText() {
    	Log.d(TAG, "Running testText");
        assertEquals(resourceString, (String)mView.getText());
    }
}

      Notes: Methods setUp and tearDown are called repetitively for each test method. If you override them, you must call the corresponding super methods for the tests to work.

  2. Self-instrumentation test (the target package is the test package itself):
    • AndroidManifest.xml: 
      <?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
      package="com.android.test"
      android:versionCode="1"
      android:versionName="1.0">
      <application>
	<uses-library android:name="android.test.runner"/>
      </application>

      <instrumentation android:name="android.test.InstrumentationTestRunner"
		       android:targetPackage="com.android.test"/>
</manifest>

    • Test code: 
      package com.android.test;

import android.util.Log;
import android.test.InstrumentationTestCase;

public class AndroidTest extends InstrumentationTestCase {
    private static final String TAG = "AndroidTest";

    @Override
    protected void setUp() throws Exception {
	Log.d(TAG, "setUp(): " + getName());
        super.setUp();
    }

    @Override 
    protected void tearDown() throws Exception {
	Log.d(TAG, "tearDown(): " + getName());
        super.tearDown();
    }

    public void testCase1() {
	assertTrue(true);
    }

    public void testCase2() {
	assertEquals("12", 12);
    }

    public void testCase3() throws Exception {
	throw new Exception();
    }

    public void thisIsNotATest() {
	Log.d(TAG, "This is not a test");
    }
}


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