RxJavaPluginsResetRule.java

/*
 * Copyright (C) 2016 Square, Inc.
 *
 * 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 retrofit2.adapter.rxjava;

import org.junit.rules.TestRule;
import org.junit.runner.Description;
import org.junit.runners.model.Statement;
import rx.plugins.RxJavaPlugins;

/** A JUnit @Rule which resets RxJava's plugins before and after each test. */
final class RxJavaPluginsResetRule implements TestRule {
  @Override public Statement apply(final Statement base, Description description) {
    return new Statement() {
      @Override public void evaluate() throws Throwable {
        RxJavaPlugins.getInstance().reset();
        try {
          base.evaluate();
        } finally {
          RxJavaPlugins.getInstance().reset();
        }
      }
    };
  }
}