ControlledLooper.java
/*
* Copyright (C) 2018 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 androidx.test.internal.platform.os;
import android.view.View;
import androidx.annotation.RestrictTo;
/**
* An API for advancing the looper when its in a paused or controlled state.
*
* <p>Implementations should be loaded via {@link
* androidx.test.internal.platform.ServiceLoaderWrapper}
*
* @hide
*/
@RestrictTo(RestrictTo.Scope.LIBRARY_GROUP) // used by core and espresso
public interface ControlledLooper {
/**
* Executes all queued main looper tasks until its idle.
*
* <p>Intended to be used in unit test environments where main thread looper is in a paused state.
*/
void drainMainThreadUntilIdle();
/** Generate window focus event for given view. */
void simulateWindowFocus(View decorView);
public static final ControlledLooper NO_OP_CONTROLLED_LOOPER =
new ControlledLooper() {
@Override
public void drainMainThreadUntilIdle() {}
@Override
public void simulateWindowFocus(View decorView) {}
};
}