content: /*
   * Copyright (C) 2011 The Android Open Source Project
   *
   * Licensed under the Apache License, Version 2.0 (the "License");
   * you may not use this file except in compliance with the License.
   * You may obtain a copy of the License at
   *
   *      http://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   */
  
  package com.android.volley.toolbox;
  
  import android.content.res.Resources;
  import android.graphics.Bitmap;
  import android.graphics.Bitmap.Config;
  import android.test.InstrumentationTestCase;
  import android.test.suitebuilder.annotation.SmallTest;
  
  import com.android.volley.NetworkResponse;
  import com.android.volley.Response;
  import com.android.volley.tests.R;
  
  import java.io.ByteArrayOutputStream;
  import java.io.IOException;
  import java.io.InputStream;
  
  @SmallTest
  public class ImageRequestTest extends InstrumentationTestCase {
  
      public void testParseNetworkResponse_resizing() throws Exception {
          byte[] jpegBytes = readRawResource(
                  getInstrumentation().getContext().getResources(), R.raw.large_jpeg_1024_500);
          NetworkResponse jpeg = new NetworkResponse(jpegBytes);
  
          // Exact sizes
          verifyResize(jpeg, 512, 250, 512, 250); // exactly half
          verifyResize(jpeg, 511, 249, 509, 249); // just under half
          verifyResize(jpeg, 1080, 500, 1024, 500); // larger
          verifyResize(jpeg, 500, 500, 500, 244); // keep same ratio
  
          // Specify only width, preserve aspect ratio
          verifyResize(jpeg, 512, 0, 512, 250);
          verifyResize(jpeg, 800, 0, 800, 390);
          verifyResize(jpeg, 1024, 0, 1024, 500);
  
          // Specify only height, preserve aspect ratio
          verifyResize(jpeg, 0, 250, 512, 250);
          verifyResize(jpeg, 0, 391, 800, 391);
          verifyResize(jpeg, 0, 500, 1024, 500);
  
          // No resize
          verifyResize(jpeg, 0, 0, 1024, 500);
      }
  
      private void verifyResize(NetworkResponse networkResponse, int maxWidth, int maxHeight,
              int expectedWidth, int expectedHeight) {
          ImageRequest request = new ImageRequest(
                  "", null, maxWidth, maxHeight, Config.RGB_565, null);
          Response<Bitmap> response = request.parseNetworkResponse(networkResponse);
          assertNotNull(response);
          assertTrue(response.isSuccess());
          Bitmap bitmap = response.result;
          assertNotNull(bitmap);
          assertEquals(expectedWidth, bitmap.getWidth());
          assertEquals(expectedHeight, bitmap.getHeight());
      }
  
      public void testFindBestSampleSize() {
          // desired == actual == 1
          assertEquals(1, ImageRequest.findBestSampleSize(100, 150, 100, 150));
  
          // exactly half == 2
          assertEquals(2, ImageRequest.findBestSampleSize(280, 160, 140, 80));
  
          // just over half == 1
          assertEquals(1, ImageRequest.findBestSampleSize(1000, 800, 501, 401));
  
          // just under 1/4 == 4
          assertEquals(4, ImageRequest.findBestSampleSize(100, 200, 24, 50));
      }
  
      private static byte[] readRawResource(Resources res, int resId) throws IOException {
          InputStream in = res.openRawResource(resId);
          ByteArrayOutputStream bytes = new ByteArrayOutputStream();
          byte[] buffer = new byte[1024];
          int count;
          while ((count = in.read(buffer)) != -1) {
              bytes.write(buffer, 0, count);
          }
          in.close();
          return bytes.toByteArray();
      }
  
  }
  