TestUtil.java

package de.vanmar.android.yarrn.util;

import org.androidannotations.api.BackgroundExecutor;
import org.mockito.invocation.InvocationOnMock;
import org.mockito.stubbing.Answer;

import java.util.concurrent.Executor;

import de.vanmar.android.yarrn.YarrnPrefs_;

import static org.mockito.Matchers.any;
import static org.mockito.Mockito.doAnswer;
import static org.mockito.Mockito.mock;

public class TestUtil {

    public static final String USERNAME = "username";

    public static void mockBackgroundExecutor() {
        final Executor executor = mock(Executor.class);

        BackgroundExecutor.setExecutor(executor);
        doAnswer(new Answer<Void>() {

            @Override
            public Void answer(final InvocationOnMock invocation)
                    throws Throwable {
                final Runnable runnable = (Runnable) invocation.getArguments()[0];
                runnable.run();
                return null;
            }
        }).when(executor).execute(any(Runnable.class));
    }

    public static void mockValidUser(final YarrnPrefs_ prefs) {
        prefs.username().put(USERNAME);
        prefs.accessToken().put("accesstoken");
        prefs.accessSecret().put("accesssecret");
    }
}