Add ExternalPrerenderRequestHandler and related API

chrome/android/javatests/src/org/chromium/chrome/browser/prerender/ExternalPrerenderRequestTest.java

Index: chrome/android/javatests/src/org/chromium/chrome/browser/prerender/ExternalPrerenderRequestTest.java
diff --git a/chrome/android/javatests/src/org/chromium/chrome/browser/prerender/ExternalPrerenderRequestTest.java b/chrome/android/javatests/src/org/chromium/chrome/browser/prerender/ExternalPrerenderRequestTest.java
new file mode 100644
index 0000000000000000000000000000000000000000..9c4c3a32d3723fcd97bfbf09af4b095d33de67ec
--- /dev/null
+++ b/chrome/android/javatests/src/org/chromium/chrome/browser/prerender/ExternalPrerenderRequestTest.java
@@ -0,0 +1,99 @@
+// Copyright 2013 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.prerender;
+
+import android.test.UiThreadTest;
+import android.test.suitebuilder.annotation.MediumTest;
+import android.test.suitebuilder.annotation.SmallTest;
+
+import org.chromium.base.ThreadUtils;
+import org.chromium.base.test.util.Feature;
+import org.chromium.chrome.browser.ContentViewUtil;
+import org.chromium.chrome.browser.profiles.Profile;
+import org.chromium.chrome.test.util.TestHttpServerClient;
+import org.chromium.chrome.testshell.ChromiumTestShellTestBase;
+
+import java.util.concurrent.Callable;
+
+/**
+ * Tests for adding and removing prerenders using the {@link ExternalPrerenderHandler}
+ */
+public class ExternalPrerenderRequestTest extends ChromiumTestShellTestBase {
+    private static final String GOOGLE_URL =
+            TestHttpServerClient.getUrl("chrome/test/data/android/prerender/google.html");
+    private static final String YOUTUBE_URL =
+            TestHttpServerClient.getUrl("chrome/test/data/android/prerender/youtube.html");
+    private static final int PRERENDER_DELAY_MS = 500;
+
+    private ExternalPrerenderHandler mHandler;
+    private Profile mProfile;
+
+    @Override
+    public void setUp() throws Exception {
+        super.setUp();
+        clearAppData();
+        launchChromiumTestShellWithBlankPage();
+        assertTrue(waitForActiveShellToBeDoneLoading());
+        mHandler = new ExternalPrerenderHandler();
+        final Callable<Profile> profileCallable = new Callable<Profile>() {
+            @Override
+            public Profile call() throws Exception {
+                return Profile.getLastUsedProfile();
+            }
+        };
+        mProfile = ThreadUtils.runOnUiThreadBlocking(profileCallable);
+    }
+
+    @MediumTest
+    @UiThreadTest
+    @Feature({"Prerender"})
+    /**
+     * Test adding a prerender and canceling that to add a new one.
+     */
+    public void testAddPrerenderAndCancel() throws InterruptedException {
+        int webContentsPtr = mHandler.addPrerender(mProfile, GOOGLE_URL, "", 0, 0);
+        assertTrue(ExternalPrerenderHandler.hasPrerenderedUrl(
+                mProfile, GOOGLE_URL, webContentsPtr));
+
+        mHandler.cancelCurrentPrerender();
+        assertFalse(ExternalPrerenderHandler.hasPrerenderedUrl(
+                mProfile, GOOGLE_URL, webContentsPtr));
+        ContentViewUtil.destroyNativeWebContents(webContentsPtr);
+        Thread.sleep(PRERENDER_DELAY_MS);
+        webContentsPtr = mHandler.addPrerender(mProfile, YOUTUBE_URL, "", 0, 0);
+        assertTrue(ExternalPrerenderHandler.hasPrerenderedUrl(
+                mProfile, YOUTUBE_URL, webContentsPtr));
+
+    }
+
+    @SmallTest
+    @UiThreadTest
+    @Feature({"Prerender"})
+    /**
+     * Test calling cancel without any added prerenders.
+     */
+    public void testCancelPrerender() {
+        mHandler.cancelCurrentPrerender();
+        int webContentsPtr = mHandler.addPrerender(mProfile, GOOGLE_URL, "", 0, 0);
+        assertTrue(ExternalPrerenderHandler.hasPrerenderedUrl(
+                mProfile, GOOGLE_URL, webContentsPtr));
+    }
+
+    @MediumTest
+    @UiThreadTest
+    @Feature({"Prerender"})
+    /**
+     * Test adding two prerenders without canceling the first one.
+     */
+    public void testAddingPrerendersInaRow() throws InterruptedException {
+        int webContentsPtr = mHandler.addPrerender(mProfile, GOOGLE_URL, "", 0, 0);
+        assertTrue(ExternalPrerenderHandler.hasPrerenderedUrl(
+                mProfile, GOOGLE_URL, webContentsPtr));
+        Thread.sleep(PRERENDER_DELAY_MS);
+        int newWebContentsPtr = mHandler.addPrerender(mProfile, YOUTUBE_URL, "", 0, 0);
+        assertTrue(ExternalPrerenderHandler.hasPrerenderedUrl(
+                mProfile, YOUTUBE_URL, newWebContentsPtr));
+    }
+}