RxSchedulersOverrideRule.java

package com.patloew.countries;


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

import io.reactivex.android.plugins.RxAndroidPlugins;
import io.reactivex.plugins.RxJavaPlugins;
import io.reactivex.schedulers.Schedulers;

/*  Copyright 2015 Ribot Ltd.

        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.
        

        FILE CHANGED 2016 by Patrick Löwenstein */

public class RxSchedulersOverrideRule implements TestRule {

    @Override
    public Statement apply(final Statement base, Description description) {
        return new Statement() {
            @Override
            public void evaluate() throws Throwable {
                RxAndroidPlugins.reset();
                RxAndroidPlugins.setMainThreadSchedulerHandler(scheduler -> Schedulers.trampoline());

                RxJavaPlugins.reset();
                RxJavaPlugins.setIoSchedulerHandler(scheduler -> Schedulers.trampoline());
                RxJavaPlugins.setComputationSchedulerHandler(scheduler -> Schedulers.trampoline());
                RxJavaPlugins.setNewThreadSchedulerHandler(scheduler -> Schedulers.trampoline());

                base.evaluate();

                RxAndroidPlugins.reset();
                RxJavaPlugins.reset();
            }
        };
    }
}