Fixes redirects to external apps when navigating from PWA.

chrome/android/javatests/src/org/chromium/chrome/browser/webapps/WebappNavigationTest.java

 // Copyright 2017 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.Color;
 import android.support.test.InstrumentationRegistry;
 import android.support.test.filters.SmallTest;
 
 import org.junit.After;
 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.ApiCompatibilityUtils;
 import org.chromium.base.test.util.CommandLineFlags;
 import org.chromium.base.test.util.Feature;
 import org.chromium.chrome.R;
 import org.chromium.chrome.browser.ChromeSwitches;
 import org.chromium.chrome.browser.ChromeTabbedActivity;
 import org.chromium.chrome.browser.ShortcutHelper;
 import org.chromium.chrome.browser.customtabs.CustomTabActivity;
+import org.chromium.chrome.browser.externalnav.ExternalNavigationHandler.OverrideUrlLoadingResult;
 import org.chromium.chrome.browser.firstrun.FirstRunStatus;
+import org.chromium.chrome.browser.tab.InterceptNavigationDelegateImpl;
 import org.chromium.chrome.test.ChromeJUnit4ClassRunner;
 import org.chromium.chrome.test.util.browser.contextmenu.ContextMenuUtils;
 import org.chromium.content.browser.test.util.DOMUtils;
 import org.chromium.net.test.EmbeddedTestServer;
 import org.chromium.ui.base.PageTransition;
 
 /**
  * Tests web navigations originating from a WebappActivity.
  */
 @RunWith(ChromeJUnit4ClassRunner.class)
 @CommandLineFlags.Add({ChromeSwitches.DISABLE_FIRST_RUN_EXPERIENCE})
 public class WebappNavigationTest {
+    private static final String YOUTUBE_URL = "https://www.youtube.com/watch?v=EYmjoW4vIX8";
     private static final String OFF_ORIGIN_URL = "https://www.google.com/";
     private static final String WEB_APP_PATH = "/chrome/test/data/banners/manifest_test_page.html";
     private static final String IN_SCOPE_PAGE_PATH =
             "/chrome/test/data/banners/manifest_no_service_worker.html";
 
     @Rule
     public final WebappActivityTestRule mActivityTestRule = new WebappActivityTestRule();
 
     @Rule
     public final TopActivityListener activityListener = new TopActivityListener();
@@ skipping 137 matching lines @@
                 mActivityTestRule.getActivity().getActivityTab(), "myTestAnchorId",
                 R.id.menu_id_open_in_chrome);
 
         ChromeTabbedActivity tabbedChrome = activityListener.waitFor(ChromeTabbedActivity.class);
 
         mActivityTestRule.waitUntilIdle(tabbedChrome);
         // Dropping the TLD as Google can redirect to a local site, so this could fail outside US.
         Assert.assertTrue(tabbedChrome.getActivityTab().getUrl().startsWith("https://www.google."));
     }
 
+    @Test
+    @SmallTest
+    @Feature({"Webapps"})
+    public void testRegularLinkToExternalApp() throws Exception {
+        runWebappActivityAndWaitForIdle(mActivityTestRule.createIntent());
+
+        InterceptNavigationDelegateImpl navigationDelegate =
+                mActivityTestRule.getActivity().getActivityTab().getInterceptNavigationDelegate();
+
+        addAnchor("testLink", YOUTUBE_URL, "_self");
+        DOMUtils.clickNode(
+                mActivityTestRule.getActivity().getActivityTab().getContentViewCore(), "testLink");
+
+        activityListener.waitForExternalApp();
+        Assert.assertEquals(OverrideUrlLoadingResult.OVERRIDE_WITH_EXTERNAL_INTENT,
+                navigationDelegate.getLastOverrideUrlLoadingResultForTests());
+    }
+
+    @Test
+    @SmallTest
+    @Feature({"Webapps"})
+    public void testNewTabLinkToExternalApp() throws Exception {
+        runWebappActivityAndWaitForIdle(mActivityTestRule.createIntent());
+
+        addAnchor("testLink", YOUTUBE_URL, "_blank");
+        DOMUtils.clickNode(
+                mActivityTestRule.getActivity().getActivityTab().getContentViewCore(), "testLink");
+
+        // For _blank anchors, we open the CustomTab which does the redirecting if necessary.
+        CustomTabActivity customTab = activityListener.waitFor(CustomTabActivity.class);
+
+        activityListener.waitForExternalApp();
+
+        InterceptNavigationDelegateImpl navigationDelegate =
+                customTab.getActivityTab().getInterceptNavigationDelegate();
+        Assert.assertEquals(OverrideUrlLoadingResult.OVERRIDE_WITH_EXTERNAL_INTENT,
+                navigationDelegate.getLastOverrideUrlLoadingResultForTests());
+    }
+
     private void runWebappActivityAndWaitForIdle(Intent intent) throws Exception {
         mActivityTestRule.startWebappActivity(
                 intent.putExtra(ShortcutHelper.EXTRA_URL, mTestServer.getURL(WEB_APP_PATH)));
 
         mActivityTestRule.waitUntilSplashscreenHides();
         mActivityTestRule.waitUntilIdle();
     }
 
     private CustomTabActivity assertCustomTabActivityLaunchedForOffOriginUrl() {
         CustomTabActivity customTab = activityListener.waitFor(CustomTabActivity.class);
 
         mActivityTestRule.waitUntilIdle(customTab);
         // Dropping the TLD as Google can redirect to a local site, so this could fail outside US.
         Assert.assertTrue(customTab.getActivityTab().getUrl().contains("https://www.google."));
 
         return customTab;
     }
 
     private void addAnchor(String id, String url, String target) throws Exception {
         mActivityTestRule.runJavaScriptCodeInCurrentTab(
                 String.format("var aTag = document.createElement('a');"
                                 + "aTag.id = '%s';"
                                 + "aTag.setAttribute('href','%s');"
                                 + "aTag.setAttribute('target','%s');"
                                 + "aTag.innerHTML = 'Click Me!';"
                                 + "document.body.appendChild(aTag);",
                         id, url, target));
     }
 }