1.在线OJ项目单元测试

1.1 单元测试的介绍

测试阶段：编码后
测试对象：最小模块
测试依据：代码+注释+详细设计文档
测试方法：白盒测试
测试内容：按照单元设计的测试文档参数，输出/边界测试，路径测试

1.2测试执行

首先在pom.xml文件中插入依赖
在file-settings-pluguins搜素Junit并安装
开始做单元测试
对要做的某一个类的方法进行测试，先选择要测试的这个类，然后点击 ctrl+shift+t,然后选择要测试的方法：
选择要测试的方法之后点击确定，然后会对类里面的各个方法进行测试，然后进行观察并且运行：

package problem;

import jdk.nashorn.internal.ir.annotations.Ignore;
import org.junit.After;
import org.junit.Before;
import org.junit.Test;

import java.util.List;

import static org.junit.Assert.*;

public class ProblemDAOTest {

    @Before
    public void setUp() throws Exception {
    }

    @After
    public void tearDown() throws Exception {
    }

    @org.junit.Ignore
    @Test
    public void insert() {
        Problem problem = new Problem();
        problem.setId(9);
        problem.setTitle("两数之和");
        problem.setLevel("简单");
        problem.setDescription("给定一个整数数组 nums 和一个整数目标值 target，请你在该数组中找出 和为目标值 target  的那 两个 整数，并返回它们的数组下标。\n" +
                "\n" +
                "你可以假设每种输入只会对应一个答案。但是，数组中同一个元素在答案里不能重复出现。\n" +
                "\n" +
                "你可以按任意顺序返回答案。\n" +
                "\n" +
                " \n" +
                "\n" +
                "示例 1：\n" +
                "\n" +
                "输入：nums = [2,7,11,15], target = 9                                                                                                                                                                                                                                                                       u                                                            d eeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee\n" +
                "输出：[0,1]\n" +
                "解释：因为 nums[0] + nums[1] == 9 ，返回 [0, 1] 。\n" +
                "示例 2：\n" +
                "\n" +
                "输入：nums = [3,2,4], target = 6\n" +
                "输出：[1,2]\n" +
                "示例 3：\n" +
                "\n" +
                "输入：nums = [3,3], target = 6\n" +
                "输出：[0,1]\n" +
                "\n" +
                "来源：力扣（LeetCode）\n" +
                "链接：https://leetcode-cn.com/problems/two-sum\n" +
                "著作权归领扣网络所有。商业转载请联系官方授权，非商业转载请注明出处。");
        problem.setTemplateCode("class Solution {\n" +
                "    public int[] twoSum(int[] nums, int target) {\n" +
                "\n" +
                "    }\n" +
                "}");
        problem.setTestCode("public static void main(String[] args) {\n" +
                "        Solution solution = new Solution();\n" +
                "        int [] arr ={2,7,11,15};\n" +
                "        int target =9;\n" +
                "        int [] result = solution.twoSum(arr,9);\n" +
                "        if(result.length == 2 && result[0] == 0 && result[1] == 1){\n" +
                "            System.out.println(\"TestCase Ok!\");\n" +
                "        }else{\n" +
                "            System.out.println(\"TestCase Failed! arr:{2,7,11,15},target:9\");\n" +
                "        }\n" +
                "\n" +
                "        int [] arr2 = {3,2,4};\n" +
                "        int target2 = 6;\n" +
                "        int [] result2 = solution.twoSum(arr2,target2);\n" +
                "        if(result2.length == 2 && result2[0] == 1 && result2[1] == 2){\n" +
                "            System.out.println(\"TestCase Ok!\");\n" +
                "        }else{\n" +
                "            System.out.println(\"TestCase Failed! arr:{3,2,4},target:6\");\n" +
                "        }\n" +
                "    }");
        ProblemDAO problemDAO = new ProblemDAO();
        problemDAO.insert(problem);
    }

    @Ignore
    @Test
    public void delete() {
        int problemId = 1;
        ProblemDAO problemDAO = new ProblemDAO();
        problemDAO.delete(problemId);
    }

    @Test
    public void selectAll() {
        ProblemDAO problemDAO = new ProblemDAO();
        List<Problem> problems = problemDAO.selectAll();
        System.out.println(problems);
    }

    @Test
    public void selectOne() {
        ProblemDAO problemDAO = new ProblemDAO();
        Problem problem = ProblemDAO.selectOne(4);
        System.out.println(problem);
    }
}