Fake data的使用和產(chǎn)生 - JavaScript篇

接上篇Fake data文章 - Python篇吠架。本文主要介紹基于JavaScript的fake data generator尖殃。

API https://randomuser.me/

randomuser.me提供一個APIhttps://randomuser.me/api/來返回隨機用戶數(shù)據(jù)，免費且十分方便好用。下面我們來看如何使用這個API宦焦。

多格式

簡單的一個GET請求https://randomuser.me/api/即可獲得包含用戶數(shù)據(jù)的response，默認格式是JSON鲤看，但通過?format=xxx參數(shù)我們可以指定不同的數(shù)據(jù)格式违柏，目前支持的有

JSON (default)
PrettyJSON or pretty
CSV
YAML
XML

結合chakram我們來看看這個API如何使用

var chakram = require('./node_modules/chakram/lib/chakram.js'),
    expect = chakram.expect;

const randomuserURL = "https://randomuser.me/api/";

describe("try random user API in different format", function () {
  it("should return JSON", function () {
    return chakram.get(randomuserURL).then(function(response){
      console.log(response.body);
      expect(response).to.have.status(200);
    });
  });

  it("should return YAML", function () {
    return chakram.get(randomuserURL + "?format=yaml").then(function(response){
      console.log(response.body);
      expect(response).to.have.status(200);
    });
  });

  it("should return XML", function () {
    return chakram.get(randomuserURL + "?format=xml").then(function(response){
      console.log(response.body);
      expect(response).to.have.status(200);
    });
  });

});

多用戶

?results=5000參數(shù)可以一次性返回多個用戶數(shù)據(jù)。上限是5000证逻。

var chakram = require('./node_modules/chakram/lib/chakram.js'),
    expect = chakram.expect;

const randomuserURL = "https://randomuser.me/api/";

describe("try random user API", function () {
  it("should two prettyJSON", function () {
    return chakram.get(randomuserURL + "?format=pretty&results=2").then(function(response){
      console.log(response.body);
      expect(response).to.have.status(200);
    });
  });

});

定制性別相關數(shù)據(jù)

?gender=male或?gender=female可以返回數(shù)據(jù)去接近于male還是female

var chakram = require('./node_modules/chakram/lib/chakram.js'),
    expect = chakram.expect;

const randomuserURL = "https://randomuser.me/api/";

describe("try random user API", function () {

  it("should return male", function () {
    return chakram.get(randomuserURL + "?gender=male").then(function(response){
      console.log(response.body);
      expect(response).to.have.status(200);
    });
  });

});

產(chǎn)生一樣的數(shù)據(jù)

?seed=danteyu可以讓每次執(zhí)行產(chǎn)生一致的數(shù)據(jù)乐埠。Seeds可以為任意字符串。比如下面的代碼重復執(zhí)行會產(chǎn)生一致的結果囚企。

var chakram = require('./node_modules/chakram/lib/chakram.js'),
    expect = chakram.expect;

const randomuserURL = "https://randomuser.me/api/";

describe("try random user API", function () {

  it("should seed", function () {
    return chakram.get(randomuserURL + "?seed=danteyu").then(function(response){
      console.log(response.body);
      expect(response).to.have.status(200);
    });
  });

});

Locale

locale可以通過?nat=us丈咐。通過設置locale，可以返回更加真實的適用于不同國籍的數(shù)據(jù)龙宏。

var chakram = require('./node_modules/chakram/lib/chakram.js'),
    expect = chakram.expect;

const randomuserURL = "https://randomuser.me/api/";

describe("try random user API", function () {

  it("should return CH", function () {
    return chakram.get(randomuserURL + "?nat=ch").then(function(response){
      console.log(response.body.results[0]);
      expect(response).to.have.status(200);
    });
  });
});

刷選特定數(shù)據(jù)

如果只是想要返回特定的幾個數(shù)據(jù)可以使用?inc=gender,name,nat來包含只需要返回的數(shù)據(jù)或是?exc=login來排除不想要的數(shù)據(jù)棵逊。

var chakram = require('./node_modules/chakram/lib/chakram.js'),
    expect = chakram.expect;

const randomuserURL = "https://randomuser.me/api/";

describe("try random user API", function () {
  it("should return name and gender", function () {
    return chakram.get(randomuserURL + "?inc=name,gender").then(function(response){
      console.log(response.body);
      expect(response).to.have.status(200);
    });
  });

});

使用?noinfo可以只返回用戶數(shù)據(jù)而沒有seed,result和version等數(shù)據(jù)。

var chakram = require('./node_modules/chakram/lib/chakram.js'),
    expect = chakram.expect;

const randomuserURL = "https://randomuser.me/api/";

describe("try random user API", function () {
  it("should return only user data", function () {
    return chakram.get(randomuserURL + "?noinfo").then(function(response){
      console.log(response.body.results);
      expect(response).to.have.status(200);
    });
  });

});

下面為輸出

> randomuser@1.0.0 test /Users/diyu/workspace/chakram
> mocha demo.js

  try random user API
[ { gender: 'male',
    name: { title: 'mr', first: 'ryan', last: 'mackay' },
    location:
     { street: '6297 richmond ave',
       city: 'stratford',
       state: 'new brunswick',
       postcode: 77478 },
    email: 'ryan.mackay@example.com',
    login:
     { username: 'heavywolf629',
       password: 'method',
       salt: 'EVZMskM7',
       md5: '6756ee051abaccca0214c997204d8d67',
       sha1: '4c265c506210e365c9e1acadcdc2321fe899d8c4',
       sha256: '90dfbb565010f9524be4531ec8fc712aad3fca69658976c8dc7615a84afa86b9' },
    dob: '1979-08-06 17:27:58',
    registered: '2002-04-02 00:35:37',
    phone: '448-153-9250',
    cell: '979-394-3188',
    id: { name: '', value: null },
    picture:
     { large: 'https://randomuser.me/api/portraits/men/62.jpg',
       medium: 'https://randomuser.me/api/portraits/med/men/62.jpg',
       thumbnail: 'https://randomuser.me/api/portraits/thumb/men/62.jpg' },
    nat: 'CA' } ]
    ? should return only user data (990ms)

  1 passing (999ms)

Faker

類似python的faker提供了各類各樣數(shù)據(jù)银酗。Faker的使用非常簡單辆影，直接引用調(diào)用就行了徒像。下面例子列舉了部分常用數(shù)據(jù)類型。

const faker = require('faker');

//address
console.log(faker.address.zipCode());
console.log(faker.address.city());
//commerce
console.log(faker.commerce.product());
console.log(faker.commerce.department());
//company
console.log(faker.company.companyName());
console.log(faker.company.bsBuzz());
//date
console.log(faker.date.future());
console.log(faker.date.month());
console.log(faker.date.weekday());
//finance
console.log(faker.finance.account());
console.log(faker.finance.transactionType());
//internet
console.log(faker.internet.email());
console.log(faker.internet.ip());
//lorem
console.log(faker.lorem.words());
console.log(faker.lorem.text());
//name
console.log(faker.name.findName());
console.log(faker.name.jobTitle());
//phone
console.log(faker.phone.phoneNumber());

Faker.fake()可以接受不同的API來組合字符串蛙讥。

const faker = require('faker');
console.log(faker.fake("{{company.companyName}}, {{internet.email}} {{phone.phoneNumber}}"))

同樣地锯蛀，faker也支持多個locale。通過下面代碼次慢，可以進行設置谬墙。

const faker = require('faker');
faker.locale = "zh_CN";

faker也支持seed()來產(chǎn)生一致的數(shù)據(jù)，這樣的數(shù)據(jù)多用于單元測試等場景中经备。重復執(zhí)行下面的代碼會產(chǎn)生一致的結果拭抬。

const faker = require('faker');
faker.seed(123);
console.log(faker.company.companyName());

faker也有CLI和JSON Schema對應的實現(xiàn)。