content: /*
   * Copyright (C) 2014 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.annotation;
  
  import java.lang.annotation.ElementType;
  import java.lang.annotation.Retention;
  import java.lang.annotation.RetentionPolicy;
  import java.lang.annotation.Target;
  
  /**
   * Classes and methods annotated with this annotation will be executed on the application's UI
   * thread (or main thread).
   *
   * <p>This annotation will only take effect for {@link org.junit.Test}, {@link org.junit.Before} or
   * {@link org.junit.After} methods.
   *
   * <p>Use {@link android.app.Instrumentation#runOnMainSync(Runnable)} if you need to switch in and
   * out of the UI thread within your method.
   */
  @Target({ElementType.METHOD, ElementType.TYPE})
  @Retention(RetentionPolicy.RUNTIME)
  public @interface UiThreadTest {}
  