Upstream oodles of Chrome for Android code into Chromium.

chrome/android/javatests/src/org/chromium/chrome/browser/ntp/NewTabPageNavigationTest.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.ntp;
+
+import android.test.suitebuilder.annotation.LargeTest;
+import android.test.suitebuilder.annotation.MediumTest;
+import android.test.suitebuilder.annotation.Smoke;
+
+import org.chromium.base.test.util.Feature;
+import org.chromium.chrome.browser.Tab;
+import org.chromium.chrome.browser.UrlConstants;
+import org.chromium.chrome.test.ChromeTabbedActivityTestBase;
+import org.chromium.chrome.test.util.TestHttpServerClient;
+
+/**
+ * Tests loading the NTP and navigating between it and other pages.
+ */
+public class NewTabPageNavigationTest extends ChromeTabbedActivityTestBase {
+
+    /**
+     * Sanity check that we do start on the NTP by default.
+     */
+    @Smoke
+    @MediumTest
+    @Feature({"NewTabPage", "Main"})
+    public void testNTPIsDefault() {
+        Tab tab = getActivity().getActivityTab();
+        assertNotNull(tab);
+        String url = tab.getUrl();
+        assertTrue("Unexpected url: " + url,
+                url.startsWith("chrome-native://newtab/")
+                || url.startsWith("chrome-native://bookmarks/")
+                || url.startsWith("chrome-native://recent-tabs/"));
+    }
+
+    /**
+     * Check that navigating away from the NTP does work.
+     */
+    @LargeTest
+    @Feature({"NewTabPage"})
+    public void testNavigatingFromNTP() throws InterruptedException {
+        String url = TestHttpServerClient.getUrl("chrome/test/data/android/google.html");
+        loadUrl(url);
+        assertEquals(url, getActivity().getActivityTab().getUrl());
+    }
+
+    /**
+     * Tests navigating back to the NTP after loading another page.
+     */
+    @MediumTest
+    @Feature({"NewTabPage"})
+    public void testNavigateBackToNTPViaUrl() throws InterruptedException {
+        String url = TestHttpServerClient.getUrl("chrome/test/data/android/google.html");
+        loadUrl(url);
+        assertEquals(url, getActivity().getActivityTab().getUrl());
+
+        loadUrl(UrlConstants.NTP_URL);
+        Tab tab = getActivity().getActivityTab();
+        assertNotNull(tab);
+        url = tab.getUrl();
+        assertEquals(UrlConstants.NTP_URL, url);
+
+        // Check that the NTP is actually displayed.
+        assertNotNull(tab.getNativePage() instanceof NewTabPage);
+    }
+
+    @Override
+    public void startMainActivity() throws InterruptedException {
+        // Passing null below starts the activity on its default page, which is the NTP on a clean
+        // profile.
+        startMainActivityWithURL(null);
+    }
+}