Nockingbird

Nockingbird is an interface for Nock. With Nockingbird, mocks are specified in straightforward text files, rather than in JavaScript code.

Example from the Nock documentation:

var scope = nock('http://myapp.iriscouch.com')
                .get('/users/1')
                .reply(404)
                .post('/users', {
                  username: 'pgte',
                  email: '[e-mail]'
                })
                .reply(201, {
                  ok: true,
                  id: '123ABC',
                  rev: '946B7D1C'
                })
                .get('/users/123ABC')
                .reply(200, {
                  _id: '123ABC',
                  _rev: '946B7D1C',
                  username: 'pgte',
                  email: '[e-mail]'
                });

The equivalent Nockingbird file is as follows:

-- chaining-example.nb

>> GET /users/1
<< 404

>> POST /users
>>   username=pgte
>>   email=pedro.teixeira%40gmail.com
<< 201
<< content-type: application/json
<< ={"ok":true,"id":"123ABC","rev":"946B7D1C"}

>> GET /users/123ABC
<< 200
<< content-type: application/json
<< ={"_id":"123ABC","_rev":"946B7D1C","username":"pgte","email":"[e-mail]"}

nockingbird.load can be used to apply the declarations in a Nockingbird file to a Nock scope object:

var nock = require('nock');
var nockingbird = require('nockingbird');
 
var scope = nock('http://myapp.iriscouch.com');
nockingbird.load(scope, __dirname + '/mocks/chaining-example.nb');

File format

Nockingbird files consist of zero or more "chunks". A file's text is broken into chunks according to the delimiter \n\n. Each line within a chunk must begin with >>, <<, or --. >> is for requests; << is for responses. Lines beginning with -- are ignored. For example:

-- Retrieve John's account details from the /users endpoint.
>> GET /users/1
<< 200
<< content-type: application/json
<< ={"id":"1","username":"jsmith","email":"[e-mail]"}

The extension for the Nockingbird file format is .nb.

Chunks

Each chunk must conform to the following grammar:

chunk               = request lines , response lines ;

Request lines

Each chunk must contain one or more request lines (lines beginning with >>), in accordance with the following grammar:

request lines       = main request line , { request body } ;
main request line   = request prefix , method name , pathname , "\n" ;
method name         = "GET" | "POST" | "PUT" | "HEAD" | "PATCH" | "MERGE" | "DELETE" ;
pathname            = { any character } ;
request body        = inline body ;
inline body         = inline body line , { inline body line } ;
inline body line    = request prefix , "=" , { any character } , "\n" ;
request prefix      = ">>" , { " " } ;
any character       = ? any character except "\n" ? ;

Response lines

Each chunk must contain two or more response lines (lines beginning with <<), in accordance with the following grammar:

response lines      = status code line , { header line } , response body ;
status code line    = response prefix , status code , "\n" ;
status code         = digit , { digit } ;
digit               = "0" | "1" | "2" | "3" | "4" | "5" | "6" | "7" | "8" | "9" ;
header line         = response prefix , header name , ":" , { " " } , header value , "\n" ;
header name         = { any character } ;
header value        = { any character } ;
response body       = inline body | filename line ;
inline body         = inline body line , { inline body line } ;
inline body line    = response prefix , "=" , { any character } , "\n" ;
filename line       = response prefix , { any character } , "\n" ;
response prefix     = "<<" , { " " } ;
any character       = ? any character except "\n" ? ;