Notifications in sensitive contexts now display origin + small icon

chrome/android/javatests/src/org/chromium/chrome/browser/notifications/NotificationBuilderBaseTest.java

+// Copyright 2015 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+package org.chromium.chrome.browser.notifications;
+
+import android.app.Notification;
+import android.content.Context;
+import android.content.res.Resources;
+import android.graphics.Bitmap;
+import android.test.suitebuilder.annotation.MediumTest;
+
+import org.chromium.base.test.util.Feature;
+import org.chromium.content.browser.test.NativeLibraryTestBase;
+
+/**
+ * Instrumentation unit tests for NotificationBuilderBase.
+ */
+public class NotificationBuilderBaseTest extends NativeLibraryTestBase {
+    @Override
+    public void setUp() throws Exception {
+        super.setUp();
+        loadNativeLibraryNoBrowserProcess();

[Peter Beverloo, 2016/09/12 17:52:03]

Would it be worth documenting that not initializing the browser process is safe
because GetDomainAndRegistry() (called through the RoundedIconGenerator) is
stand-alone? This can be a potential foot-gun if another test gets added that
does require initialized parts of the browser process.

[awdf, 2016/09/14 12:30:29]

Done.

+    }
+
+    /**
+     * Tests the three paths for ensuring that a notification will be shown with a normalized icon:
+     *     (1) NULL bitmaps should have an auto-generated image.
+     *     (2) Large bitmaps should be resized to the device's intended size.
+     *     (3) Smaller bitmaps should be left alone.
+     */
+    @MediumTest
+    @Feature({"Browser", "Notifications"})
+    public void testEnsureNormalizedIconBehavior() throws Exception {
+        // Get the dimensions of the notification icon that will be presented to the user.
+        Context appContext = getInstrumentation().getTargetContext().getApplicationContext();
+        Resources resources = appContext.getResources();
+
+        int largeIconWidthPx =
+                resources.getDimensionPixelSize(android.R.dimen.notification_large_icon_width);
+        int largeIconHeightPx =
+                resources.getDimensionPixelSize(android.R.dimen.notification_large_icon_height);
+
+        String origin = "https://example.com";
+
+        NotificationBuilderBase notificationBuilder = new NotificationBuilderBase(resources) {
+            @Override
+            public Notification build() {
+                return null;
+            }
+        };

[Peter Beverloo, 2016/09/12 17:52:02]

There's nothing in your code that calls build(), so I don't think it's necessary
to override it?

I do love this syntax, though.

[awdf, 2016/09/14 12:30:29]

NotificationBuilderBase is abstract so in order to instantiate it to call
ensureNormalizedIcon I have to create an implementation, which needs to override
abstract method build(). I could instantiate one of the existing implementations
instead, but this seemed neater.

[Peter Beverloo, 2016/09/14 14:06:54]

Acknowledged.

+        Bitmap fromNullIcon = notificationBuilder.ensureNormalizedIcon(null, origin);
+        assertNotNull(fromNullIcon);
+        assertEquals(largeIconWidthPx, fromNullIcon.getWidth());
+        assertEquals(largeIconHeightPx, fromNullIcon.getHeight());
+
+        Bitmap largeIcon = Bitmap.createBitmap(
+                largeIconWidthPx * 2, largeIconHeightPx * 2, Bitmap.Config.ALPHA_8);
+
+        Bitmap fromLargeIcon = notificationBuilder.ensureNormalizedIcon(largeIcon, origin);
+        assertNotNull(fromLargeIcon);
+        assertEquals(largeIconWidthPx, fromLargeIcon.getWidth());
+        assertEquals(largeIconHeightPx, fromLargeIcon.getHeight());
+
+        Bitmap smallIcon = Bitmap.createBitmap(
+                largeIconWidthPx / 2, largeIconHeightPx / 2, Bitmap.Config.ALPHA_8);
+
+        Bitmap fromSmallIcon = notificationBuilder.ensureNormalizedIcon(smallIcon, origin);
+        assertNotNull(fromSmallIcon);
+        assertEquals(smallIcon, fromSmallIcon);
+    }
+}