Convert ChromeActivityTestCaseBase direct children to JUnit4

chrome/android/javatests/src/org/chromium/chrome/browser/ntp/snippets/ArticleSnippetsTest.java

Index: chrome/android/javatests/src/org/chromium/chrome/browser/ntp/snippets/ArticleSnippetsTest.java
diff --git a/chrome/android/javatests/src/org/chromium/chrome/browser/ntp/snippets/ArticleSnippetsTest.java b/chrome/android/javatests/src/org/chromium/chrome/browser/ntp/snippets/ArticleSnippetsTest.java
index b4c346da828b43b04091726f72d4813bc192bb77..0943a21ddcb6e3d9745f8231b346ed5f516a27e4 100644
--- a/chrome/android/javatests/src/org/chromium/chrome/browser/ntp/snippets/ArticleSnippetsTest.java
+++ b/chrome/android/javatests/src/org/chromium/chrome/browser/ntp/snippets/ArticleSnippetsTest.java
@@ -5,16 +5,24 @@
 package org.chromium.chrome.browser.ntp.snippets;
 
 import android.graphics.BitmapFactory;
+import android.support.test.InstrumentationRegistry;
 import android.support.test.filters.MediumTest;
 import android.util.TypedValue;
 import android.view.ViewGroup;
 import android.widget.FrameLayout;
 
+import org.junit.Before;
+import org.junit.Rule;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+
 import org.chromium.base.ThreadUtils;
+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.ChromeActivity;
+import org.chromium.chrome.browser.ChromeSwitches;
 import org.chromium.chrome.browser.favicon.FaviconHelper.FaviconImageCallback;
 import org.chromium.chrome.browser.favicon.FaviconHelper.IconAvailabilityCallback;
 import org.chromium.chrome.browser.favicon.LargeIconBridge.LargeIconCallback;
@@ -31,7 +39,8 @@ import org.chromium.chrome.browser.suggestions.SuggestionsUiDelegate;
 import org.chromium.chrome.browser.widget.displaystyle.HorizontalDisplayStyle;
 import org.chromium.chrome.browser.widget.displaystyle.UiConfig;
 import org.chromium.chrome.browser.widget.displaystyle.VerticalDisplayStyle;
-import org.chromium.chrome.test.ChromeActivityTestCaseBase;
+import org.chromium.chrome.test.ChromeActivityTestRule;
+import org.chromium.chrome.test.ChromeJUnit4ClassRunner;
 import org.chromium.chrome.test.util.RenderUtils.ViewRenderer;
 import org.chromium.chrome.test.util.browser.suggestions.DummySuggestionsMetricsReporter;
 import org.chromium.chrome.test.util.browser.suggestions.FakeSuggestionsSource;
@@ -42,7 +51,14 @@ import java.util.Arrays;
 /**
  * Tests for the appearance of Article Snippets.
  */
-public class ArticleSnippetsTest extends ChromeActivityTestCaseBase<ChromeActivity> {
+@RunWith(ChromeJUnit4ClassRunner.class)
+@CommandLineFlags.Add({ChromeSwitches.DISABLE_FIRST_RUN_EXPERIENCE,
+        ChromeActivityTestRule.DISABLE_NETWORK_PREDICTION_FLAG})
+public class ArticleSnippetsTest {
+    @Rule
+    public ChromeActivityTestRule<ChromeActivity> mActivityTestRule =
+            new ChromeActivityTestRule<>(ChromeActivity.class);
+
     private ViewRenderer mViewRenderer;
 
     private SuggestionsUiDelegate mUiDelegate;
@@ -53,10 +69,7 @@ public class ArticleSnippetsTest extends ChromeActivityTestCaseBase<ChromeActivi
     private FrameLayout mContentView;
     private UiConfig mUiConfig;
 
-    public ArticleSnippetsTest() {
-        super(ChromeActivity.class);
-    }
-
+    @Test
     @MediumTest
     @Feature({"ArticleSnippets", "RenderTest"})
     @RetryOnFailure
@@ -66,12 +79,12 @@ public class ArticleSnippetsTest extends ChromeActivityTestCaseBase<ChromeActivi
             public void run() {
                 setupTestData();
 
-                mContentView = new FrameLayout(getActivity());
+                mContentView = new FrameLayout(mActivityTestRule.getActivity());
                 mUiConfig = new UiConfig(mContentView);
 
-                getActivity().setContentView(mContentView);
+                mActivityTestRule.getActivity().setContentView(mContentView);
 
-                mRecyclerView = new SuggestionsRecyclerView(getActivity());
+                mRecyclerView = new SuggestionsRecyclerView(mActivityTestRule.getActivity());
                 mContentView.addView(mRecyclerView);
 
                 mAdapter = new NewTabPageAdapter(mUiDelegate, /* aboveTheFold = */ null, mUiConfig,
@@ -82,7 +95,7 @@ public class ArticleSnippetsTest extends ChromeActivityTestCaseBase<ChromeActivi
             }
         });
 
-        getInstrumentation().waitForIdleSync();
+        InstrumentationRegistry.getInstrumentation().waitForIdleSync();
 
         int first = mAdapter.getFirstCardPosition();
         mViewRenderer.renderAndCompare(mRecyclerView.getChildAt(first), "short_snippet");
@@ -111,7 +124,7 @@ public class ArticleSnippetsTest extends ChromeActivityTestCaseBase<ChromeActivi
             }
         });
 
-        getInstrumentation().waitForIdleSync();
+        InstrumentationRegistry.getInstrumentation().waitForIdleSync();
 
         mViewRenderer.renderAndCompare(mRecyclerView.getChildAt(first), "short_snippet_narrow");
         mViewRenderer.renderAndCompare(mRecyclerView.getChildAt(first + 1), "long_snippet_narrow");
@@ -132,8 +145,9 @@ public class ArticleSnippetsTest extends ChromeActivityTestCaseBase<ChromeActivi
                 1466614774, // Publish timestamp
                 10f, // Score
                 1466634774); // Fetch timestamp
-        shortSnippet.setThumbnailBitmap(BitmapFactory.decodeResource(getActivity().getResources(),
-                R.drawable.signin_promo_illustration));
+        shortSnippet.setThumbnailBitmap(
+                BitmapFactory.decodeResource(mActivityTestRule.getActivity().getResources(),
+                        R.drawable.signin_promo_illustration));
 
         SnippetArticle longSnippet = new SnippetArticle(fullCategory, "id2",
                 new String(new char[20]).replace("\0", "Snippet "),
@@ -175,16 +189,11 @@ public class ArticleSnippetsTest extends ChromeActivityTestCaseBase<ChromeActivi
                 minimalCategory, Arrays.asList(minimalSnippet, minimalSnippet2));
     }
 
-    @Override
-    public void startMainActivity() throws InterruptedException {
-        startMainActivityOnBlankPage();
-        mViewRenderer = new ViewRenderer(getActivity(),
+    @Before
+    public void setUp() throws Exception {
+        mActivityTestRule.startMainActivityOnBlankPage();
+        mViewRenderer = new ViewRenderer(mActivityTestRule.getActivity(),
                 "chrome/test/data/android/render_tests", this.getClass().getSimpleName());
-    }
-
-    @Override
-    protected void setUp() throws Exception {
-        super.setUp();
         mUiDelegate = new MockUiDelegate();
         mSnippetsSource = new FakeSuggestionsSource();
     }
@@ -205,8 +214,9 @@ public class ArticleSnippetsTest extends ChromeActivityTestCaseBase<ChromeActivi
                 public void run() {
                     // Return an arbitrary drawable.
                     faviconCallback.onFaviconAvailable(
-                            BitmapFactory.decodeResource(getActivity().getResources(),
-                            R.drawable.star_green),
+                            BitmapFactory.decodeResource(
+                                    mActivityTestRule.getActivity().getResources(),
+                                    R.drawable.star_green),
                             url);
                 }
             });