rest-bdd-testing

Toolchain for testing REST API, in BDD style.

Installation

rest-bdd-testing is available on npm. To install it, type:

$ npm install rest-bdd-testing

Usage

Here is sample usage of this package with mocha.

const http = require('http');
const URL = require('url');
const assert = require('assert');
 
import {Given, Update} from 'rest-bdd-testing';
 
describe('Simple usage of REST BDD Tesing in mocha', function() {
    let app, given;
 
    before(function(done) {
        app = http.createServer((req, res) => {
            let parsedUrl = URL.parse(req.url,true);
 
            if (parsedUrl.pathname.endsWith('null')) {
                res.writeHead(404, {'Content-Type': 'text/plain'});
                res.end('404 Not found');
            } else {
                res.setHeader('Content-Type', 'application/json;charset=utf-8');
                res.end(JSON.stringify({
                    foo: 'bar'
                }));
            }
 
        }).listen(done);
    });
 
    after(function(done) {
        given.end();
        app.close(done);
    });
 
    it('Happy Scenario', async function() {
        given = new Given(app, 'Happy Scenario', 'When name is  provided, result should be caught.', {
            autodump: './given.json',
            autodoc: './given.md',
            url: '/books/id: 1/writers/name:john?fields=[fullName,age]&sort=-id',
            verb: 'GET',
        });
 
        let fulfilledRequest = await given.requestBaseCall();
        assert.deepStrictEqual(fulfilledRequest.response.status, 200);
    });
 
    it('Unhappy Scenario', async function() {
        let newFulfilledRequest = await given.when('Name is null', 'The name url parameter is null', {
            urlParams: new Update({'name': null})
        });
 
        assert.deepStrictEqual(newFulfilledRequest.response.status, 404);
    });
 
});
 

If autodump or autodoc presents, the given.end() creates 2 files for dumping and documenting given(story);

Dumping Story

The json file for above story:

{
    "baseCall": {
        "title": "Happy Scenario",
        "description": "When name is  provided, result should be caught.",
        "url": "/books/:id/writers/:name",
        "verb": "GET",
        "query": {
            "fields": "[fullName,age]",
            "sort": "-id"
        },
        "urlParams": {
            "id": "1",
            "name": "john"
        },
        "response": {
            "status": 200,
            "headers": {
                "content-type": "application/json;charset=utf-8",
                "date": "Thu, 18 Apr 2019 21:25:41 GMT",
                "connection": "close",
                "content-length": "13"
            },
            "json": {
                "foo": "bar"
            }
        }
    },
    "calls": [
        {
            "title": "Name is null",
            "urlParams": {
                "id": "1",
                "name": null
            },
            "description": "The name url parameter is null",
            "response": {
                "status": 404,
                "headers": {
                    "content-type": "text/plain",
                    "date": "Thu, 18 Apr 2019 21:25:41 GMT",
                    "connection": "close",
                    "transfer-encoding": "chunked"
                },
                "body": "404 Not found"
            }
        }
    ]
}
 

Documenting Story

The md file for above story:

## Happy Scenario

### GET /books/:id/writers/:name

When name is  provided, result should be caught.

### Url Parameters

Name | Example
---|---
id | 1
name | john

### Query Strings

Name | Example
---|---
fields | [fullName,age]
sort | -id

### Response: 200

#### Headers

* date: Thu, 18 Apr 2019 21:55:43 GMT
* connection: close
* content-length: 13

#### Body:

Content-Type: application/json

```json
{
    "foo": "bar"
}
```

---

## WHEN: Name is null

### GET /books/:id/writers/:name

The name url parameter is null

### Url Parameters

Name | Example
---|---
id | 1
name | 

### Response: 404

#### Headers

* date: Thu, 18 Apr 2019 21:55:43 GMT
* connection: close
* transfer-encoding: chunked

#### Body:

Content-Type: text/plain

```
404 Not found
```