blob: f0214bfb0cc120db2dcdf992bfc6ccbc2848d92b (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
|
/*
* Copyright (C) 2017 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package android.arch.lifecycle;
import static android.arch.lifecycle.Lifecycle.State.RESUMED;
import android.app.Activity;
import android.app.Instrumentation;
import android.app.Instrumentation.ActivityMonitor;
import android.support.test.InstrumentationRegistry;
import android.support.test.rule.ActivityTestRule;
import android.support.v4.app.FragmentActivity;
import java.util.concurrent.CountDownLatch;
class TestUtils {
private static final long TIMEOUT_MS = 2000;
@SuppressWarnings("unchecked")
static <T extends Activity> T recreateActivity(final T activity, ActivityTestRule rule)
throws Throwable {
ActivityMonitor monitor = new ActivityMonitor(
activity.getClass().getCanonicalName(), null, false);
Instrumentation instrumentation = InstrumentationRegistry.getInstrumentation();
instrumentation.addMonitor(monitor);
rule.runOnUiThread(activity::recreate);
T result;
// this guarantee that we will reinstall monitor between notifications about onDestroy
// and onCreate
//noinspection SynchronizationOnLocalVariableOrMethodParameter
synchronized (monitor) {
do {
// the documetation says "Block until an Activity is created
// that matches this monitor." This statement is true, but there are some other
// true statements like: "Block until an Activity is destoyed" or
// "Block until an Activity is resumed"...
// this call will release synchronization monitor's monitor
result = (T) monitor.waitForActivityWithTimeout(TIMEOUT_MS);
if (result == null) {
throw new RuntimeException("Timeout. Failed to recreate an activity");
}
} while (result == activity);
}
return result;
}
static void waitTillResumed(final FragmentActivity a, ActivityTestRule<?> activityRule)
throws Throwable {
final CountDownLatch latch = new CountDownLatch(1);
activityRule.runOnUiThread(() -> {
Lifecycle.State currentState = a.getLifecycle().getCurrentState();
if (currentState == RESUMED) {
latch.countDown();
}
a.getLifecycle().addObserver(new LifecycleObserver() {
@OnLifecycleEvent(Lifecycle.Event.ON_RESUME)
public void onStateChanged(LifecycleOwner provider) {
latch.countDown();
provider.getLifecycle().removeObserver(this);
}
});
});
latch.await();
}
}
|
