本文主要介绍在android studio中进行单元测试的方式，你将了解到
1.如何在android studio中引用JUnit4
2.单元测试Demo
然后在build.gradle中添加
compile 'com.jakewharton.espresso:espresso:1.1-r3'~~~
Demo
新建一个Calculator 测试它的方法
package com.example.news;
/**
-
Created by 小新 on 2016/7/1.
*/
public class Calculator {
public double sum(double a, double b){
return a+b;
}public double substract(double a, double b){
return a-b;
}public double divide(double a, double b){
return a/b;
}public double multiply(double a, double b){
return a*b;
}public double addMore(double a,double b,double c){
return a+b+c;}
}
在类名上面点击右键生成test测试类
会在测试类的包中自动生成测试类
package com.example.news;
import org.junit.Before;
import org.junit.Test;
import static org.junit.Assert.*;
/**
-
Created by 小新 on 2016/7/1.
*/
public class CalculatorTest {@Before
public void setUp() throws Exception {}
@Test
public void testSum() throws Exception {}
@Test
public void testSubstract() throws Exception {}
@Test
public void testDivide() throws Exception {}
@Test
public void testMultiply() throws Exception {}
@Test
public void testAddMore() throws Exception {}
}
然后进行测试
package com.example.news;
import org.junit.Before;
import org.junit.Test;
import static org.junit.Assert.*;
/**
-
Created by 小新 on 2016/7/1.
*/
public class CalculatorTest1 {
private Calculator calculator;@Before
public void setUp() throws Exception {
calculator = new Calculator();}
@Test
public void testSum() throws Exception {
//测试sum函数，因为sum函数返回的是两个数的合为3
//这里期望返回的值是9
//所以会报错
assertEquals(9d,calculator.sum(1d,2d),0);
}@Test
public void testSubstract() throws Exception {}
@Test
public void testDivide() throws Exception {}
@Test
public void testMultiply() throws Exception {}
@Test
public void testAddMore() throws Exception {}
}
运行这个类，结果为报错，这个时候我们就需要修改函数了
到这里我们JUnix的简单测试就结束了