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| 1 // Copyright 2017 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.chrome.browser.webapps; |
| 6 |
| 7 import android.app.Activity; |
| 8 |
| 9 import org.junit.rules.TestRule; |
| 10 import org.junit.runner.Description; |
| 11 import org.junit.runners.model.Statement; |
| 12 |
| 13 import org.chromium.base.ActivityState; |
| 14 import org.chromium.base.ApplicationStatus; |
| 15 import org.chromium.base.ApplicationStatus.ActivityStateListener; |
| 16 import org.chromium.content.browser.test.util.Criteria; |
| 17 import org.chromium.content.browser.test.util.CriteriaHelper; |
| 18 |
| 19 import javax.annotation.Nullable; |
| 20 |
| 21 /** |
| 22 * Test rule tracking which Chrome activity is currently at the top of the task. |
| 23 */ |
| 24 public class TopActivityListener implements TestRule { |
| 25 private final ActivityStateListener mListener = new ActivityStateListener()
{ |
| 26 @Override |
| 27 public void onActivityStateChange(Activity activity, int newState) { |
| 28 if (newState == ActivityState.RESUMED) { |
| 29 mMostRecentActivity = activity; |
| 30 } |
| 31 } |
| 32 }; |
| 33 |
| 34 private Activity mMostRecentActivity; |
| 35 |
| 36 @Override |
| 37 public Statement apply(final Statement base, Description description) { |
| 38 return new Statement() { |
| 39 @Override |
| 40 public void evaluate() throws Throwable { |
| 41 ApplicationStatus.registerStateListenerForAllActivities(mListene
r); |
| 42 base.evaluate(); |
| 43 ApplicationStatus.unregisterActivityStateListener(mListener); |
| 44 } |
| 45 }; |
| 46 } |
| 47 |
| 48 @Nullable |
| 49 public Activity getMostRecentActivity() { |
| 50 return mMostRecentActivity; |
| 51 } |
| 52 |
| 53 @SuppressWarnings("unchecked") |
| 54 public <T extends Activity> T waitFor(final Class<T> expectedActivityClass)
{ |
| 55 CriteriaHelper.pollUiThread(new Criteria() { |
| 56 @Override |
| 57 public boolean isSatisfied() { |
| 58 return mMostRecentActivity != null |
| 59 && expectedActivityClass.isAssignableFrom(mMostRecentAct
ivity.getClass()); |
| 60 } |
| 61 }); |
| 62 return (T) mMostRecentActivity; |
| 63 } |
| 64 } |
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