diff options
Diffstat (limited to 'core/src/test/java/com/android/volley/toolbox/ImageRequestTest.java')
-rw-r--r-- | core/src/test/java/com/android/volley/toolbox/ImageRequestTest.java | 194 |
1 files changed, 194 insertions, 0 deletions
diff --git a/core/src/test/java/com/android/volley/toolbox/ImageRequestTest.java b/core/src/test/java/com/android/volley/toolbox/ImageRequestTest.java new file mode 100644 index 0000000..6b50319 --- /dev/null +++ b/core/src/test/java/com/android/volley/toolbox/ImageRequestTest.java @@ -0,0 +1,194 @@ +/* + * 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 static org.junit.Assert.assertEquals; +import static org.junit.Assert.assertNotNull; +import static org.junit.Assert.assertTrue; + +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 java.io.ByteArrayOutputStream; +import java.io.IOException; +import java.io.InputStream; +import java.nio.charset.StandardCharsets; +import org.junit.Test; +import org.junit.runner.RunWith; +import org.robolectric.RobolectricTestRunner; +import org.robolectric.shadows.ShadowBitmapFactory; + +@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(StandardCharsets.UTF_8); + 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)); + assertEquals(ImageRequest.DEFAULT_IMAGE_TIMEOUT_MS, 1000); + assertEquals(ImageRequest.DEFAULT_IMAGE_MAX_RETRIES, 2); + assertEquals(ImageRequest.DEFAULT_IMAGE_BACKOFF_MULT, 2f, 0); + } +} |