Set FastBitmapDrawable's badge alpha when updating drawable alpha.

import static org.mockito.Mockito.when;

import android.graphics.Bitmap;

import android.graphics.drawable.Drawable;

import android.view.animation.AccelerateInterpolator;

import android.view.animation.DecelerateInterpolator;

import android.view.animation.PathInterpolator;

import org.junit.Before;

import org.junit.Test;

import org.junit.runner.RunWith;

import org.mockito.Mock;

import org.mockito.MockitoAnnotations;

import org.mockito.Spy;

/**

    @Spy

    FastBitmapDrawable mFastBitmapDrawable =

            spy(new FastBitmapDrawable(Bitmap.createBitmap(100, 100, Bitmap.Config.ARGB_8888)));

    @Mock Drawable mBadge;

    @Before

    public void setUp() {

        MockitoAnnotations.initMocks(this);

        FastBitmapDrawable.setFlagHoverEnabled(true);

        when(mFastBitmapDrawable.isVisible()).thenReturn(true);

        mFastBitmapDrawable.mIsPressed = false;

        assertEquals("End value not correct.", (float) SCALE.get(mFastBitmapDrawable), 1f, EPSILON);

        verify(mFastBitmapDrawable).invalidateSelf();

    }

    @Test

    public void testUpdateBadgeAlpha() {

        mFastBitmapDrawable.setBadge(mBadge);

        mFastBitmapDrawable.setAlpha(1);

        mFastBitmapDrawable.setAlpha(0);

        verify(mBadge).setAlpha(1);

        verify(mBadge).setAlpha(0);

    }

}