node-red-contrib-mockingbird 0.1.0

A Node-RED node to create a mockdata for test-cases.

npm install node-red-contrib-mockingbird

base on node-red-node-web-data-generator

A Node-RED node to create a mockdata for test-cases.


Run the following command in your Node-RED user directory - typically ~/.node-red

    npm install node-red-contrib-mockingbird


Creates dummy data based on a handlebars-style template.

Uses the dummy-json module, which can create rich sets of dummy data for testing or other uses.

It will build a string, or a parsed JSON object, creating values based on the helper names below:

title, firstname, lastname, company, domain, tld, email,
street, city, country, countryCode, zipcode, postcode,
lat, long, phone, color, hexColor, guid,
ipv4, ipv6, lorem, date, time,
lowercase, uppercase, int, float, boolean

Multiple values can be generated by use of the repeat syntax.

In addition any properties passed in on the msg object can also be used - for example {{payload}}.

Finally msg.seed can be used to preset the pseudo-random seed to ensure repeatability across calls.


The example flow below produces a JSON string which is then converted into an object, for example:

    "name": "Theo Cumbie",
    "work": "CoreXTS",
    "email": "[email protected]",
    "address": "83 Sherman Road",
    "country": "Angola",
    "text": "Sagittis orci elementum e vel scelerisque. Amet ac tristique lectus. Morbi e suscipit scelerisque auctor curabitur velit metus gravida quis."

Example flow

[{"id":"10189452.18ef3c","type":"tab","label":"流程1"},{"id":"ed7643.abe789c","type":"inject","z":"10189452.18ef3c","name":"","topic":"","payload":"","payloadType":"str","repeat":"3","crontab":"","once":false,"x":270,"y":240,"wires":[["6c645b2e.b7f0f4"]]},{"id":"75379d17.68c494","type":"debug","z":"10189452.18ef3c","name":"","active":true,"console":"false","complete":"false","x":673,"y":240,"wires":[]},{"id":"6c645b2e.b7f0f4","type":"mockingbird","z":"10189452.18ef3c","name":"","field":"payload","fieldType":"msg","optionField":"MBOption","optionFieldType":"flow","syntax":"json","template":"{\n    \"ID\": \"{{guid}}\",\n    \"value\": {{float 20 80 '0.00'}},\n    \"manufacturerID\": \"{{randomItem 'IBM' 'SONY' 'APPLE'}}\",\n    \"tags\":[\n        {{#repeat 0 3}}\n           \"{{tag}}\"\n        {{/repeat}}\n    ],\n    \"location\":{\n        \"city\": \"{{city}}\",\n        \"zone\": \"{{randomItem 'A区' 'B区' 'C区'}}\",\n        \"building\": \"{{randomItem '1号楼' '2号楼'}}\",\n        \"floor\": \"{{randomItem '1F' '2F' '3F'}}\",\n        \"room\": \"{{randomItem '01' '02' '03'}}\"\n    }\n}","x":450,"y":240,"wires":[["75379d17.68c494"]]},{"id":"9f723d02.3aaa3","type":"function","z":"10189452.18ef3c","name":"option","func":"function randomArrayItem(arr){\n    return arr[Math.floor(Math.random() * arr.length)]\n}\nflow.set('MBOption', {\n    mockdata:{\n        cities: ['上海','北京','广州','武汉']\n    },\n    helpers:{\n        tag: function (){\n            return 'Tag-' + Math.floor(Math.random() * 99);\n        }\n    }\n\n})","outputs":1,"noerr":0,"x":330,"y":140,"wires":[[]]},{"id":"425de352.e346cc","type":"inject","z":"10189452.18ef3c","name":"","topic":"","payload":"","payloadType":"str","repeat":"","crontab":"","once":true,"x":150,"y":140,"wires":[["9f723d02.3aaa3"]]}]

Node Info

Version: 0.1.0
Updated 2 months, 2 weeks ago
License: apache 2.0


1 in the last day
7 in the last week
16 in the last month


  • mockingbird


  • node-red
  • data-generator
  • dummy-json
  • mockdata
  • mockingbird


  • somax