在Android studio中，测试输出数组中最大子数组的和

 1 package com.example.tony.testforgit;
 2 
 3 /**
 4  * Created by Tony on 2017/3/17.
 5  */
 6 public class Array {
 7     public  int maxArr(int[] arr){
 8         int newSum = arr[0];
 9         int maxSum = arr[0];
10         for(int i=1;i<arr.length;i++){
11             newSum += arr[i];
12             if(newSum<arr[i]){
13                 newSum = arr[i];
14             }
15             if(maxSum<newSum){
16                 maxSum = newSum;
17             }
18         }
19         return maxSum;
20     }
21 }

生成测试类，编辑测试用例

package com.example.tony.testforgit;

import org.junit.Before;
import org.junit.Test;

import static org.junit.Assert.*;

/**
 * Created by Tony on 2017/3/17.
 */
public class ArrayTest {
    private Array array;

    int arr1[] ={1,2,3,-1,2};
    
    @Before
    public void setUp() throws Exception {
       array = new Array();
    }

    @Test
    public void testMaxArr() throws Exception {
        assertEquals(7d,array.maxArr(arr1),0);


    }
}

测试结果：成功