Example JUnit4 Test

gistfile1.txt

package com.etsy.android.perf;

import android.app.Instrumentation;
import android.support.test.InstrumentationRegistry;
import android.support.test.runner.AndroidJUnit4;
import android.test.suitebuilder.annotation.LargeTest;

import com.etsy.android.BOEApplication;
import com.etsy.android.test.rules.EtsyAccountRule;
import com.etsy.android.test.rules.EtsyConfigRule;
import com.etsy.android.test.EtsyFunctionalTestTimer;

import org.junit.ClassRule;
import org.junit.Test;
import org.junit.Before;
import org.junit.runner.RunWith;

import static junit.framework.Assert.assertNotNull;

/**
 * A test to measure the time it takes for the application to start up
 */
@RunWith(AndroidJUnit4.class)
@LargeTest
public class ApplicationLaunchTests {

    @ClassRule
    public static EtsyConfigRule mConfigRule = new EtsyConfigRule();

    @ClassRule
    public static EtsyAccountRule mAccountRule = EtsyAccountRule.noAccount();

    @Before
    public void setup() {
    }

    @Test
    public void testApplicationStartupTime_signedOut() throws IllegalAccessException, ClassNotFoundException, InstantiationException {
        EtsyFunctionalTestTimer appLaunchTimer = EtsyFunctionalTestTimer.time(PerfConstants.APP_LAUNCH_TIME);
        final BOEApplication application = (BOEApplication) Instrumentation.newApplication(BOEApplication.class, InstrumentationRegistry.getTargetContext());
        assertNotNull(application);
        InstrumentationRegistry.getInstrumentation().runOnMainSync(new Runnable() {
            @Override
            public void run() {
                application.onCreate();
            }
        });
        appLaunchTimer.stop();
    }
}