Js与Express

零碎

关于Mocha的test学习

下面是使用Mocha写的测试代码，用来测试一些数据是否正确，原来是这样的，一直重复写一些固定格式的东西，很繁琐，每次增加测试类都会重新写一遍，在维护上增加了很多难度。后面会做优化。

test code：

const chai = require("chai")
const axios = require("axios")
chai.Should();

describe("Sort via quick sort function.", ()=>{
    it("正序", (done)=>{
        axios.post("http://localhost:3000/quick",
            [1,3,5,7,8,9,4,12,15,11,17,19]
        ).then((response)=>{
            response.data.should.eql("1,3,4,5,7,8,9,11,12,15,17,19");
            done();
        }).catch((error)=>{
            done(error);
        })
    })
    it("乱", (done)=>{
        axios.post("http://localhost:3000/quick",
            [5,6,3234,8,7,54,3,223,2,23,4,5,5,4,23,23,23,23,4234,234,242,4,32423,423,42,42,3423,4]
        ).then((response)=>{
            response.data.should.eql("2,3,4,4,4,4,5,5,5,6,7,8,23,23,23,23,23,42,42,54,223,234,242,423,3234,3423,4234,32423");
            done();
        }).catch((error)=>{
            done(error);
        })
    })

    it("倒", (done)=>{
        axios.post("http://localhost:3000/quick",
            [32423,4234,3423,3234,423,242,234,223,54,42,42,23,23,23,23,23,8,7,6,5,5,5,4,4,4,4,3,2]
        ).then((response)=>{
            response.data.should.eql("2,3,4,4,4,4,5,5,5,6,7,8,23,23,23,23,23,42,42,54,223,234,242,423,3234,3423,4234,32423");
            done();
        }).catch((error)=>{
            done(error);
        })
    })

    it("重复数字多", (done)=>{
        axios.post("http://localhost:3000/quick",
            [1,2,1,1,1,1,1,1,1,1,1,1,1,1,1,1,2,2,2,1,1,1,1,2,2,1,1]
        ).then((response)=>{
            response.data.should.eql("1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,2,2,2,2,2,2");
            done();
        }).catch((error)=>{
            done(error);
        })
    })

    it("length 0", (done)=>{
        axios.post("http://localhost:3000/quick",
            []
        ).then((response)=>{
            response.data.should.eql("");
            done();
        }).catch((error)=>{
            done(error);
        })
    })

    it("length 1", (done)=>{
        axios.post("http://localhost:3000/quick",
            [111]
        ).then((response)=>{
            response.data.should.eql(111);
            done();
        }).catch((error)=>{
            done(error);
        })
    })

    it("alpha", (done)=>{
        axios.post("http://localhost:3000/quick",
            ["b", "a", "c"]
        ).then((response)=>{
            response.data.should.eql("a,b,c");
            done();
        }).catch((error)=>{
            done(error);
        })
    })

    it("null", (done)=>{
        axios.post("http://localhost:3000/quick",
            [null]
        ).then((response)=>{
            response.data.should.eql("x");
            done();
        }).catch((error)=>{
            done(error);
        })
    })
})

用到chai和should，axios

优化：

const chai = require("chai")
const axios = require("axios")
chai.should();

var datatest = [
    { name: "1", input: { "inputtext": "ab-cd" }, output: "dc-ba" },
    { name: "null", input: { "inputtext": "" }, output: "" },
    { name: "random", input: { "inputtext": "a-bC-dEf-ghIj" }, output: "j-Ih-gfE-dCba" },
    { name: "2", input: { "inputtext": "Test1ng-Leet=code-Q" }, output: "Qedo1ct-eeLg=ntse-T" },
    { name: "3", input: { "inputtext": "Test1ng-Leet=code-Q!" }, output: "Qedo1ct-eeLg=ntse-T!" },
    { name: "0", input: { "inputtext": "Lets take LeetCode contest" }, output: "tset noce doCteeLe katsteL" },
    { name: "all", input: { "inputtext": "+_)*)(&&*^^*" }, output: "+_)*)(&&*^^*" }
]

function template(name, input, output) {
    it(name, (done) => {
        axios.post("http://localhost:3000/onlyword",
            input).then((response) => {
                response.data.should.eql(output);
                done();
            }).catch((error) => {
                done(error);
            })
    })
}

describe("onlyword", () => {
    for (var i = 0; i < datatest.length; i++) {
        template(
            datatest[i].name,
            datatest[i].input,
            datatest[i].output
        )
    }
})

---

routes code:

var express = require("express");
var router = express.Router();

function uniqueMorseRepresentations(words) {
    var morse = [".-", "-...", "-.-.", "-..", ".", "..-.", "--.", "....", "..", ".---", "-.-", ".-..", "--", "-.", "---", ".--.", "--.-", ".-.", "...", "-", "..-", "...-", ".--", "-..-", "-.--", "--.."];
    var strs = new Array;
    var j = 0;
    for (var i = 0; i < words.length; i++) {
        var word = words[i].split("");
        for (var m = 0; m < word.length; m++) {
            if (word[m] >= 'a' && word[m] <= 'z') {
                var num = word[m].charCodeAt() - 97;
                var str = morse[num];
                strs[j] += str;
            }
        }
        j++;
    }
    if (strs) {
        if (strs.length == 1)
            return 1;
        else {
            var nstrs = new Array();
            for (var k = 0; k < strs.length; k++) {
                if (nstrs.indexOf(strs[k]) == -1)
                    nstrs.push(strs[k]);
            }
            return nstrs.length;
        }
    } else
        return 0;
}

router.post('/', function (req, res, next) {
    var tmp = req.body;
    if (tmp == null) {
        res.status(400).send("ERROR.");
        return;
    }
    var tmp = JSON.parse(JSON.stringify(tmp));
    var result = uniqueMorseRepresentations(tmp);
    res.status(200).send("" + result);
});

module.exports = router;

在package.json文件中配置相关信息和依赖：

{
  "name": "cat",
  "version": "0.0.0",
  "private": true,
  "scripts": {
    "start": "node ./bin/www",
    "test": "cd test; mocha"
  },
  "dependencies": {
    "axios": "^0.19.0",
    "body-parser": "^1.19.0",
    "chai": "^4.2.0",
    "cookie-parser": "~1.4.4",
    "debug": "~2.6.9",
    "express": "~4.16.1",
    "http-errors": "~1.6.3",
    "jade": "~1.11.0",
    "mocha": "^6.1.4",
    "morgan": "~1.9.1"
  }
}

在script中可以自己设置关键字来简化操作，后面是操作符

---

创建express应用程序：

创建一个目录，在终端cd到这个文件下，express，然后yarn instill下载全部依赖，就可以了

关于test，需要引入mocha ，chai，should，mocha和chai要在package.json文件中添加依赖，并且运行测试需要在测试文件目录下运行mocha。