1 files changed, 107 insertions, 0 deletions
diff --git a/src/test/java/com/android/volley/toolbox/ImageRequestTest.java b/src/test/java/com/android/volley/toolbox/ImageRequestTest.java
new file mode 100644
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+++ b/src/test/java/com/android/volley/toolbox/ImageRequestTest.java
@@ -0,0 +1,107 @@
+/*
+ * 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 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);
+
+        // No resize
+        verifyResize(jpeg, 0, 0, 1024, 500);
+
+        // 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);
+    }
+
+    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());
+    }
+
+    @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();
+    }
+}