android studio 单元测试 JUnit

环境准备
在 .gradle中配置
defaultConfig {
testInstrumentationRunner “android.support.test.runner.AndroidJUnitRunner”
}
dependencies {
testCompile ‘junit:junit:4.12’
compile ‘com.android.support.test.espresso:espresso-core:2.2.2’
compile ‘com.android.support.test:runner:0.5’
}

纯Java测试
1、测试类
public class JavaTextActivity {
private int date;
public void JavaTextActivity(){
}
public String sayHello(int now , String user){
date = now;
String tall = “Hi,”+user+”.”+getGreeting();
return tall;
}

public String getGreeting() {    if(date == 1)        return "Happy new year!";    else if(date >1 && date<6)        return "Good morning!";    else if(date==6)        return "Good afternoon!";    else        return "Good night!";}

}

2.测试步骤
选择 JavaTextActivity 类名 —> 右键 Go To —->Test —->Create New Test —–>选中 setUp@Before And tearDown@After ——> OK ——->生成测试类 JavaTextActivityTest

3.测试类
public class JavaTextActivityTest {
private JavaTextActivity javaTextActivity = null;
@Before
public void setUp() throws Exception {
javaTextActivity = new JavaTextActivity();
}

@Afterpublic void tearDown() throws Exception {    javaTextActivity = null;}@Testpublic void sayHello() throws Exception {}@Testpublic void testSayHelloInTheMorning() throws Exception{    int date = 2;    String user = "煲约二";    String result = javaTextActivity.sayHello(date,user);    assertEquals(result,"Hi,煲约二.Good morning!");} 

}

4.运行测试类

在工程列表中选中 JavaTextActivityTest ——–>右键 Run “JavaTextActivityTest ”

5.测试类中的方法

在Favorite 窗口中选中 JavaTextActivityTest 中的 testSayHelloInTheMorning（）右键选中
Run

6.测试结果

assertEquals(result,”Hi,煲约二.Good morning!”);

if （result == “Hi,煲约二.Good morning!”）
正确结果 Process finished with exit code 0
else
错误结果