package com.bumptech.glide.load.resource.bitmap;

import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertNotSame;
import static org.mockito.Matchers.eq;
import static org.mockito.Mockito.mock;
import static org.mockito.Mockito.verify;

import android.graphics.Bitmap;
import android.graphics.drawable.BitmapDrawable;

import com.bumptech.glide.load.engine.bitmap_recycle.BitmapPool;

import org.junit.Before;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.robolectric.Robolectric;
import org.robolectric.RobolectricTestRunner;
import org.robolectric.annotation.Config;

@RunWith(RobolectricTestRunner.class)
@Config(manifest = Config.NONE, emulateSdk = 18)
public class BitmapDrawableResourceTest {
    private BitmapDrawableResourceHarness harness;

    @Before
    public void setUp() {
        harness = new BitmapDrawableResourceHarness();
    }

    @Test
    public void testReturnsGivenBitmapFromGet() {
        assertEquals(harness.bitmap, harness.create().get().getBitmap());
    }


    @Test
    public void testReturnsDifferentDrawableEachTime() {
        BitmapDrawableResource resource = harness.create();
        BitmapDrawable first = resource.get();
        BitmapDrawable second = resource.get();

        assertNotSame(first, second);
    }

    @Test
    public void testReturnsSizeFromGivenBitmap() {
        assertEquals(harness.bitmap.getHeight() * harness.bitmap.getRowBytes(), harness.create().getSize());
    }

    @Test
    public void testBitmapIsReturnedToPoolOnRecycle() {
        harness.create().recycle();

        verify(harness.bitmapPool).put(eq(harness.bitmap));
    }

    private static class BitmapDrawableResourceHarness {
        BitmapPool bitmapPool = mock(BitmapPool.class);
        Bitmap bitmap = Bitmap.createBitmap(100, 100, Bitmap.Config.ARGB_8888);

        public BitmapDrawableResource create() {
            return new BitmapDrawableResource(new BitmapDrawable(Robolectric.application.getResources(), bitmap),
                    bitmapPool);
        }
    }
}
