Convert WebappActivityTestBase and direct children to JUnit4.

chrome/android/javatests/src/org/chromium/chrome/browser/webapps/WebappSplashScreenHomescreenIconTest.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.webapps;
 
-import android.content.Intent;
 import android.graphics.Bitmap;
 import android.graphics.drawable.BitmapDrawable;
 import android.support.test.filters.SmallTest;
 import android.view.ViewGroup;
 import android.widget.ImageView;
 
+import org.junit.Assert;
+import org.junit.Before;
+import org.junit.Rule;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+
 import org.chromium.base.metrics.RecordHistogram;
+import org.chromium.base.test.util.CommandLineFlags;
 import org.chromium.base.test.util.Feature;
 import org.chromium.base.test.util.RetryOnFailure;
 import org.chromium.chrome.R;
+import org.chromium.chrome.browser.ChromeSwitches;
 import org.chromium.chrome.browser.ShortcutHelper;
 import org.chromium.chrome.browser.metrics.WebappUma;
+import org.chromium.chrome.test.ChromeActivityTestRule;
+import org.chromium.chrome.test.ChromeJUnit4ClassRunner;
 
 /**
  * Tests for splash screens with EXTRA_ICON specified in the Intent.
  */
-public class WebappSplashScreenHomescreenIconTest extends WebappActivityTestBase {
-    @Override
-    protected void setUp() throws Exception {
-        super.setUp();
-        startWebappActivity();
+@RunWith(ChromeJUnit4ClassRunner.class)
+@CommandLineFlags.Add({ChromeSwitches.DISABLE_FIRST_RUN_EXPERIENCE,
+        ChromeActivityTestRule.DISABLE_NETWORK_PREDICTION_FLAG})
+public class WebappSplashScreenHomescreenIconTest {
+    @Rule
+    public final WebappActivityTestRule mActivityTestRule = new WebappActivityTestRule();
+
+    @Before
+    public void setUp() throws Exception {
+        mActivityTestRule.startWebappActivity(mActivityTestRule.createIntent().putExtra(
+                ShortcutHelper.EXTRA_ICON, WebappActivityTestRule.TEST_ICON));
     }
 
-    @Override
-    protected Intent createIntent() {
-        Intent intent = super.createIntent();
-        intent.putExtra(ShortcutHelper.EXTRA_ICON, TEST_ICON);
-        return intent;
-    }
-
+    @Test
     @SmallTest
     @Feature({"Webapps"})
     public void testShowFallbackIcon() {
-        ViewGroup splashScreen = waitUntilSplashScreenAppears();
+        ViewGroup splashScreen = mActivityTestRule.waitUntilSplashScreenAppears();
         ImageView splashImage = (ImageView) splashScreen.findViewById(
                 R.id.webapp_splash_screen_icon);
         BitmapDrawable drawable = (BitmapDrawable) splashImage.getDrawable();
 
-        assertEquals(192, drawable.getBitmap().getWidth());
-        assertEquals(192, drawable.getBitmap().getHeight());
+        Assert.assertEquals(192, drawable.getBitmap().getWidth());
+        Assert.assertEquals(192, drawable.getBitmap().getHeight());
     }
 
+    @Test
     @SmallTest
     @Feature({"Webapps"})
     @RetryOnFailure
     public void testUmaFallbackIcon() {
-        assertEquals(1, RecordHistogram.getHistogramValueCountForTesting(
-                WebappUma.HISTOGRAM_SPLASHSCREEN_ICON_TYPE,
-                WebappUma.SPLASHSCREEN_ICON_TYPE_FALLBACK));
+        Assert.assertEquals(1,
+                RecordHistogram.getHistogramValueCountForTesting(
+                        WebappUma.HISTOGRAM_SPLASHSCREEN_ICON_TYPE,
+                        WebappUma.SPLASHSCREEN_ICON_TYPE_FALLBACK));
 
-        Bitmap icon = ShortcutHelper.decodeBitmapFromString(TEST_ICON);
+        Bitmap icon = ShortcutHelper.decodeBitmapFromString(WebappActivityTestRule.TEST_ICON);
         int sizeInDp = Math.round((float) icon.getWidth()
-                / getActivity().getResources().getDisplayMetrics().density);
-        assertEquals(1, RecordHistogram.getHistogramValueCountForTesting(
-                WebappUma.HISTOGRAM_SPLASHSCREEN_ICON_SIZE, sizeInDp));
+                / mActivityTestRule.getActivity().getResources().getDisplayMetrics().density);
+        Assert.assertEquals(1,
+                RecordHistogram.getHistogramValueCountForTesting(
+                        WebappUma.HISTOGRAM_SPLASHSCREEN_ICON_SIZE, sizeInDp));
     }
 }