Ts-test-decorators NPM

Test Decorators

This project will help to smoothly migrate from Java to Javascript automation.

Let's say we have the following test written in Java:

public class AuthorizationTests {
    
    @Issue("42")
    @TmsLink("58")
    @Feature("Login")
    @Story("58")
    @Severity(SeverityLevel.BLOCKER)
    @Test(dataProvider = "testData")
    public void userShouldBeAbleToSignIn(User user) {
        open(LoginPage.class)
            .loginWith(user)
            .select(ProfilePage.class);
    
        verifyThat(at(ProfilePage.class))
            .fullNameIs(user.getFullName())
            .usernameIs(user.getUsername());
    }
    
    @DataSupplier
    public StreamEx testData() {
        return StreamEx.of(
          new User('stranger', '123456', 'Strange Person'),
          new User('test', '123456', 'Test User')
        );
    }    
}

Everyone in a Java world get used to strict types, classes and annotations. You may wonder how to achieve the same in JS?

The answer is using Typescript and decorators.

@testdeck/mocha will help us with core features. However, it has nothing to do with Allure. Moreover, there's no flexible DataProvider mechanism available.

This library fills these gaps, so that you can write your tests the following way:

import { Severity } from "allure2-js-commons"
import { suite, test } from '@testdeck/mocha'
import {
  assignPmsUrl,
  assignTmsUrl,
  decorate,
  data,
  description,
  feature,
  issue,
  owner,
  severity,
  story,
  tag,
  testCaseId
} from 'ts-test-decorators'
import { allure, MochaAllure } from 'allure-mocha/runtime'
      
@suite
class AuthorizationTests {
  static testData = () => {
    return new User('Test', 'User')
  }

  before() {
    const gitHubUrl: string = 'https://github.com/sskorol/ts-test-decorators/issues'
    assignPmsUrl(gitHubUrl)
    assignTmsUrl(gitHubUrl)
    decorate<MochaAllure>(allure)
  }
      
  @issue('42')
  @testCaseId('58')
  @severity(Severity.BLOCKER)
  @feature('Login')
  @story('58')
  @owner('skorol')
  @tag('smoke')
  @description('Basic authorization test.')
  @data(AuthorizationTests.testData)
  @data.naming((user: User) => `${user} should be able to sign`)
  @test
  userShouldBeAbleToSignIn(user: User) {
    open(LoginPage)
      .loginWith(user)
      .select(ProfilePage)
    
    verifyThat(atProfilePage)
      .fullNameIs(user.fullName)
      .usernameIs(user.username)
  }
}

Installation

npm i ts-test-decorators --save-dev

or via yarn:

yarn add ts-test-decorators --dev

As it's an extension to allure-js and testdeck, you have to install the following dependencies:

mocha
@testdeck/mocha
allure-mocha
allure-js-commons
source-map-support
typescript

Configuration

Either add allure-mocha into .mocharc.json:

{
  "require": "source-map-support/register",
  "reporter": "allure-mocha"
}

Or pass the same value via commandline / scripts:

mocha -R allure-mocha

tsconfig.json may look like the following:

{
  "compilerOptions": {
    "target": "es2017",
    "module": "commonjs",
    "inlineSourceMap": true,
    "inlineSources": true,
    "emitDecoratorMetadata": true,
    "experimentalDecorators": true,
    "declaration": true,
    "lib": [
      "es7"
    ],
    "types": [
      "node",
      "mocha",
      "chai"
    ],
    "removeComments": true,
    "noImplicitAny": false,
    "baseUrl": ".",
    "paths": {
      "*": [ "./*" ],
      "src/*": ["./src/*"]
    },
    "typeRoots": [
      "node_modules/@types"
    ]
  },
  "include": [
    "./src/**/*.ts"
  ],
  "exclude": [
    "node_modules"
  ]
}

Now you can use the following decorators:

attachment<T>(name: string, type: ContentType)
issue<T>(idFn: string | ((arg: T) => string))
testCaseId<T>(idFn: string | ((arg: T) => string))
feature<T>(featureFn: string | ((arg: T) => string))
story<T>(storyFn: string | ((arg: T) => string))
severity<T>(severityFn: Severity | string | ((arg: T) => string | Severity))
tag<T>(tagFn: string | ((arg: T) => string))
owner<T>(ownerFn: string | ((arg: T) => string))
epic<T>(epicFn: string | ((arg: T) => string))
description<T>(descriptionFn: string | ((arg: T) => string))
step<T>(nameFn: string | ((arg: T) => string))
data(params: any, name?: string)
data.naming(nameForTests: (parameters: any) => string)

To activate decorators you have to provide Allure implementation in runtime. You can do that the following way:

import { decorate } from 'ts-test-decorators';
import { allure, MochaAllure } from 'allure-mocha/runtime'
// ...
  before() {
    decorate<MochaAllure>(allure)
  }

If you want to set you own trackers' URLs, do the following:

import { assignPmsUrl, assignTmsUrl } from 'ts-test-decorators';
// ...
  before() {
    const gitHubUrl: string = 'https://github.com/sskorol/ts-test-decorators/issues'
    assignPmsUrl(gitHubUrl)
    assignTmsUrl(gitHubUrl)
  }

@data is not related to Allure. It's just a wrapper for testdeck @params decorator.

Also, be aware of @test and @data order. They should be always put before actual test method signature.