2 添加单元测试类

2.1 手动编写单元测试类

2.1.1 androidTest测试类

package com.xiaoying.untitestdemo;import android.content.Context;
import android.content.pm.ApplicationInfo;
import android.content.pm.PackageManager;
import android.os.Bundle;
import android.support.test.InstrumentationRegistry;import org.junit.Before;
import org.junit.Test;import static org.junit.Assert.assertEquals;/*** Created by yinglovezhuzhu@gmail.com on 2018/5/13.*/
public class MainActivityTest {private Context mTargetContext;@Beforepublic void setUp() throws Exception {mTargetContext = InstrumentationRegistry.getTargetContext();}@Testpublic void onCreate() {try {ApplicationInfo applicationInfo = mTargetContext.getPackageManager().getApplicationInfo(mTargetContext.getPackageName(), PackageManager.GET_META_DATA);Bundle metaData = applicationInfo.metaData;String data = metaData.getString("com.xiaoying.TEST");assertEquals("1234567890", data);} catch (PackageManager.NameNotFoundException e) {e.printStackTrace();}}
}

2.1.2 test测试类

package com.xiaoying.untitestdemo;import org.junit.Before;
import org.junit.Test;import static org.junit.Assert.*;/*** Created by yinglovezhuzhu@gmail.com on 2018/5/13.*/
public class UtilsTest {@Beforepublic void setUp() throws Exception {}@Testpublic void isEmpty() {assertEquals(true, Utils.isEmpty(""));}
}

2.1.3 测试类中的setUp方法

2.2 自动生成测试类和测试方法