| /* |
| * 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.graphics.Bitmap; |
| import android.graphics.Bitmap.Config; |
| import android.widget.ImageView; |
| import android.widget.ImageView.ScaleType; |
| import com.android.volley.NetworkResponse; |
| import com.android.volley.Response; |
| import org.junit.Test; |
| import org.junit.runner.RunWith; |
| import org.robolectric.RobolectricTestRunner; |
| import org.robolectric.shadows.ShadowBitmapFactory; |
| |
| import java.io.ByteArrayOutputStream; |
| import java.io.IOException; |
| import java.io.InputStream; |
| |
| import static org.junit.Assert.*; |
| |
| @RunWith(RobolectricTestRunner.class) |
| public class ImageRequestTest { |
| |
| @Test public void parseNetworkResponse_resizing() throws Exception { |
| // This is a horrible hack but Robolectric doesn't have a way to provide |
| // width and height hints for decodeByteArray. It works because the byte array |
| // "file:fake" is ASCII encodable and thus the name in Robolectric's fake |
| // bitmap creator survives as-is, and provideWidthAndHeightHints puts |
| // "file:" + name in its lookaside map. I write all this because it will |
| // probably break mysteriously at some point and I feel terrible about your |
| // having to debug it. |
| byte[] jpegBytes = "file:fake".getBytes(); |
| ShadowBitmapFactory.provideWidthAndHeightHints("fake", 1024, 500); |
| NetworkResponse jpeg = new NetworkResponse(jpegBytes); |
| |
| // Scale the image uniformly (maintain the image's aspect ratio) so that |
| // both dimensions (width and height) of the image will be equal to or |
| // less than the corresponding dimension of the view. |
| ScaleType scalteType = ScaleType.CENTER_INSIDE; |
| |
| // Exact sizes |
| verifyResize(jpeg, 512, 250, scalteType, 512, 250); // exactly half |
| verifyResize(jpeg, 511, 249, scalteType, 509, 249); // just under half |
| verifyResize(jpeg, 1080, 500, scalteType, 1024, 500); // larger |
| verifyResize(jpeg, 500, 500, scalteType, 500, 244); // keep same ratio |
| |
| // Specify only width, preserve aspect ratio |
| verifyResize(jpeg, 512, 0, scalteType, 512, 250); |
| verifyResize(jpeg, 800, 0, scalteType, 800, 390); |
| verifyResize(jpeg, 1024, 0, scalteType, 1024, 500); |
| |
| // Specify only height, preserve aspect ratio |
| verifyResize(jpeg, 0, 250, scalteType, 512, 250); |
| verifyResize(jpeg, 0, 391, scalteType, 800, 391); |
| verifyResize(jpeg, 0, 500, scalteType, 1024, 500); |
| |
| // No resize |
| verifyResize(jpeg, 0, 0, scalteType, 1024, 500); |
| |
| |
| // Scale the image uniformly (maintain the image's aspect ratio) so that |
| // both dimensions (width and height) of the image will be equal to or |
| // larger than the corresponding dimension of the view. |
| scalteType = ScaleType.CENTER_CROP; |
| |
| // Exact sizes |
| verifyResize(jpeg, 512, 250, scalteType, 512, 250); |
| verifyResize(jpeg, 511, 249, scalteType, 511, 249); |
| verifyResize(jpeg, 1080, 500, scalteType, 1024, 500); |
| verifyResize(jpeg, 500, 500, scalteType, 1024, 500); |
| |
| // Specify only width |
| verifyResize(jpeg, 512, 0, scalteType, 512, 250); |
| verifyResize(jpeg, 800, 0, scalteType, 800, 390); |
| verifyResize(jpeg, 1024, 0, scalteType, 1024, 500); |
| |
| // Specify only height |
| verifyResize(jpeg, 0, 250, scalteType, 512, 250); |
| verifyResize(jpeg, 0, 391, scalteType, 800, 391); |
| verifyResize(jpeg, 0, 500, scalteType, 1024, 500); |
| |
| // No resize |
| verifyResize(jpeg, 0, 0, scalteType, 1024, 500); |
| |
| |
| // Scale in X and Y independently, so that src matches dst exactly. This |
| // may change the aspect ratio of the src. |
| scalteType = ScaleType.FIT_XY; |
| |
| // Exact sizes |
| verifyResize(jpeg, 512, 250, scalteType, 512, 250); |
| verifyResize(jpeg, 511, 249, scalteType, 511, 249); |
| verifyResize(jpeg, 1080, 500, scalteType, 1024, 500); |
| verifyResize(jpeg, 500, 500, scalteType, 500, 500); |
| |
| // Specify only width |
| verifyResize(jpeg, 512, 0, scalteType, 512, 500); |
| verifyResize(jpeg, 800, 0, scalteType, 800, 500); |
| verifyResize(jpeg, 1024, 0, scalteType, 1024, 500); |
| |
| // Specify only height |
| verifyResize(jpeg, 0, 250, scalteType, 1024, 250); |
| verifyResize(jpeg, 0, 391, scalteType, 1024, 391); |
| verifyResize(jpeg, 0, 500, scalteType, 1024, 500); |
| |
| // No resize |
| verifyResize(jpeg, 0, 0, scalteType, 1024, 500); |
| } |
| |
| private void verifyResize(NetworkResponse networkResponse, int maxWidth, int maxHeight, |
| ScaleType scaleType, int expectedWidth, int expectedHeight) { |
| ImageRequest request = new ImageRequest("", null, maxWidth, maxHeight, scaleType, |
| 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()); |
| } |
| |
| @Test public void findBestSampleSize() { |
| // 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[] readInputStream(InputStream in) throws IOException { |
| 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(); |
| } |
| |
| @Test |
| public void publicMethods() throws Exception { |
| // Catch-all test to find API-breaking changes. |
| assertNotNull(ImageRequest.class.getConstructor(String.class, Response.Listener.class, |
| int.class, int.class, Bitmap.Config.class, Response.ErrorListener.class)); |
| assertNotNull(ImageRequest.class.getConstructor(String.class, Response.Listener.class, |
| int.class, int.class, ImageView.ScaleType.class, Bitmap.Config.class, |
| Response.ErrorListener.class)); |
| } |
| } |