/*
 * Copyright (C) 2012 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.runner.listener;

import android.util.Log;
import org.junit.runner.Description;
import org.junit.runner.notification.RunListener;

/**
 * A <a href="http://junit.org/javadoc/latest/org/junit/runner/notification/RunListener.html"><code>
 * RunListener</code></a> that injects a given delay between tests.
 */
public class DelayInjector extends RunListener {

  private final int delayMsec;

  /** @param delayMsec */
  public DelayInjector(int delayMsec) {
    this.delayMsec = delayMsec;
  }

  @Override
  public void testRunStarted(Description description) throws Exception {
    // delay before first test
    delay();
  }

  @Override
  public void testFinished(Description description) throws Exception {
    // delay after every test
    delay();
  }

  private void delay() {
    try {
      Thread.sleep(delayMsec);
    } catch (InterruptedException e) {
      Log.e("DelayInjector", "interrupted", e);
    }
  }
}