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Unit Testing

Create a project that you want to test.

  • Create a unit test project. File | New | Android Test Project. See Figure 01.
  • Name your project. See Figure 02.
  • Select the project you want to test. See Figure 03.
  • Select your build target. See Figure 04.
  • Open up the src for your test project. Right click on the empty package and choose  New | Class
  • Create your test class descending from android.test.ActivityInstrumentationTestCase2<T> as Shown in Figure 5.
  • Now set up the code for your unit tests as shown in Listing 1. By default, the class that you are wanting to test can live comfortably as a parameterized value in your generic type ActivityInstrumentationTestCase2. You might get an error here, if you are using some library such as andEngine where your main class is not a direct descendant of Activity. To fix this, I went into LearningMan, Project | Properties | Java Build Path | Order and Export and checked andengine.jar, which is file where BaseGameActivity is defined. The point is that LearningManActivity does not implement Activity, but rather BaseGameActivity, and so I had to make sure that JUnit had access to BaseGameActivity, I assume because it needed to see that BaseGameActivity implements Activity.
  • Now all you need to do is override setUpand write a test, as shown in Listing 2.

Creating a unit test project

Figure 01: Creating an Android Test Project

Name your project

Figure 02: Name your project

Select the project you want to test

Figure 03: Select the project you want to test.

Select build target

Figure 04: Select your build target.

Create a test class

Figure 04: Create your test class.

package com.elvenware.walking.test;

import android.test.ActivityInstrumentationTestCase2;
import com.elvenware.walking.LearningManActivity;

public class BasicTests extends ActivityInstrumentationTestCase2<LearningManActivity>
{
    public BasicTests()
    {
        super("com.elvenware.walking", LearningManActivity.class);
    }
}

Listing 1: Setting up your unit test.

package com.elvenware.walking.test;

import android.test.ActivityInstrumentationTestCase2;
import com.elvenware.walking.LearningManActivity;

public class BasicTests extends ActivityInstrumentationTestCase2
{
    private LearningManActivity mActivity;

    public BasicTests()
    {
        super("com.elvenware.walking", LearningManActivity.class);
    }

    @Override
    protected void setUp() throws Exception 
    {
        super.setUp();
        mActivity = this.getActivity();
    }

    public void testText() 
    {
        assertEquals("Eduction and learning",
            (String)mActivity.getText(com.elvenware.walking.R.string.hello));
    }
}

Listing 2: A complete test

Hello, Testing

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