java - JUnit:如何获取非 Activity 测试用例的上下文？

Question

我正在为我的非 Activity 类编写一个测试类:

    public class SinglePhoto {

    public static Bitmap decodeSampledBitmapFromResource(Resources res, int resId,
                                                         int reqWidth, int reqHeight) {

        // First decode with inJustDecodeBounds=true to check dimensions
        final BitmapFactory.Options options = new BitmapFactory.Options();
        options.inJustDecodeBounds = true;
        BitmapFactory.decodeResource(res, resId, options);

        // Calculate inSampleSize
        options.inSampleSize = calculateInSampleSize(options, reqWidth, reqHeight);

        // Decode bitmap with inSampleSize set
        options.inJustDecodeBounds = false;
        return BitmapFactory.decodeResource(res, resId, options);
    }

   //---...
}

在我的测试类中，我需要访问上下文，但我不知道该怎么做:

    public class SinglePhotoTest extends TestCase {

    public void testDecodeSampledBitmapFromResource() throws Exception {

        SinglePhoto sp = new SinglePhoto();

        Context testContext = ??!

        Bitmap bmp = sp.decodeSampledBitmapFromResource(testContext.getResources(), R.drawable.sample, 100, 100);

    }
}

你能帮我吗？

谢谢

Answer 1

不要扩展 TestCase，而是扩展 AndroidTestCase。并使用 getContext() 方法获取上下文。这是 AndroidTestCase 文档:http://developer.android.com/reference/android/test/AndroidTestCase.html