| 1 | // Copyright (c) 2012 The Chromium Authors. All rights reserved. |
| 2 | // Use of this source code is governed by a BSD-style license that can be |
| 3 | // found in the LICENSE file. |
| 4 | |
| 5 | package org.chromium.content.browser.test.util; |
| 6 | |
| 7 | import android.app.Activity; |
| 8 | import android.app.Instrumentation; |
| 9 | |
| 10 | import junit.framework.Assert; |
| 11 | |
| 12 | import java.util.concurrent.Semaphore; |
| 13 | import java.util.concurrent.TimeUnit; |
| 14 | |
| 15 | /** |
| 16 | * Collection of UI utilities. |
| 17 | */ |
| 18 | public class UiUtils { |
| 19 | private static final int WAIT_FOR_RESPONSE_MS = 10000; // timeout to wait for runOnUiThread() |
| 20 | |
| 21 | /** |
| 22 | * Runs the runnable on the UI thread. |
| 23 | * |
| 24 | * @param activity The activity on which the runnable must run. |
| 25 | * @param runnable The runnable to run. |
| 26 | */ |
| 27 | public static void runOnUiThread(Activity activity, final Runnable runnable) { |
| 28 | final Semaphore finishedSemaphore = new Semaphore(0); |
| 29 | activity.runOnUiThread(new Runnable() { |
| 30 | @Override |
| 31 | public void run() { |
| 32 | runnable.run(); |
| 33 | finishedSemaphore.release(); |
| 34 | }}); |
| 35 | try { |
| 36 | Assert.assertTrue(finishedSemaphore.tryAcquire(1, WAIT_FOR_RESPONSE_MS, |
| 37 | TimeUnit.MILLISECONDS)); |
| 38 | } catch (InterruptedException ignored) { |
| 39 | Assert.assertTrue("Interrupted while waiting for main thread Runnable", false); |
| 40 | } |
| 41 | } |
| 42 | |
| 43 | /** |
| 44 | * Waits for the UI thread to settle down. |
| 45 | * <p> |
| 46 | * Waits for an extra period of time after the UI loop is idle. |
| 47 | * |
| 48 | * @param instrumentation Instrumentation object used by the test. |
| 49 | */ |
| 50 | public static void settleDownUI(Instrumentation instrumentation) throws InterruptedException { |
| 51 | instrumentation.waitForIdleSync(); |
| 52 | Thread.sleep(1000); |
| 53 | } |
| 54 | } |