/* * 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 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)); assertEquals(ImageRequest.DEFAULT_IMAGE_TIMEOUT_MS, 1000); assertEquals(ImageRequest.DEFAULT_IMAGE_MAX_RETRIES, 2); assertEquals(ImageRequest.DEFAULT_IMAGE_BACKOFF_MULT, 2f); } }