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/*
* 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.support.wear.widget.util;
import android.support.test.espresso.PerformException;
import android.support.test.espresso.UiController;
import android.support.test.espresso.ViewAction;
import android.support.test.espresso.util.HumanReadables;
import android.support.test.espresso.util.TreeIterables;
import android.view.View;
import org.hamcrest.Matchers;
import org.hamcrest.StringDescription;
import java.util.concurrent.TimeoutException;
public class AsyncViewActions {
/** Perform action of waiting for a specific view id. */
public static ViewAction waitForMatchingView(
final org.hamcrest.Matcher<? extends View> viewMatcher, final long millis) {
return new ViewAction() {
@Override
public void perform(UiController uiController, View view) {
uiController.loopMainThreadUntilIdle();
final long startTime = System.currentTimeMillis();
final long endTime = startTime + millis;
do {
for (View child : TreeIterables.breadthFirstViewTraversal(view)) {
// found matching view
if (viewMatcher.matches(child)) {
return;
}
}
uiController.loopMainThreadForAtLeast(100); // at least 3 frames
} while (System.currentTimeMillis() < endTime);
// timeout happens
throw new PerformException.Builder()
.withActionDescription(this.getDescription())
.withViewDescription(HumanReadables.describe(view))
.withCause(new TimeoutException())
.build();
}
@Override
public String getDescription() {
return "Wait for view which matches " + StringDescription.asString(viewMatcher);
}
@Override
public org.hamcrest.Matcher<View> getConstraints() {
return Matchers.any(View.class);
}
};
}
}
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