1、新建立一个Android工程

 

package com.shellway.junit;
public class Service {
public int divide(int a，int b){
return a/b;
}
}
package com.shellway.junit;
import junit.framework.Assert;
import android.test.AndroidTestCase;
public class TestT extends AndroidTestCase {
public void test1(){
Service service = new Service();
System.out.println(service.divide(10， 2));
}
public void test2(){
Service service = new Service();
System.out.println(service.divide(10， 0));
}
public void test3(){
Service service = new Service();
Assert.assertEquals(2.5， service.divide(10， 4));
}
}
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.shellway.junit"
android:versionCode="1"
android:versionName="1.0" >
<uses-sdk
android:minSdkVersion="16"
android:targetSdkVersion="21" />
<instrumentation
android:targetPackage="com.shellway.junit"
android:name="android.test.InstrumentationTestRunner" />
<application
android:allowBackup="true"
android:icon="@drawable/ic_launcher"
android:label="@string/app_name"
android:theme="@style/AppTheme" >
<uses-library android:name="android.test.runner" />
<activity
android:name=".MainActivity"
android:label="@string/app_name" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
</application>
</manifest>