Ranger: A test data generator

Ranger is a test data generator that lets you create customized, correlated test data using the Ranger language.

This example Ranger file

produces such an output

{"age":37,"sex":"female","name":"Lucy","id":"Lucy123","pin":"1683","eyes":"brown"}
{"age":57,"sex":"male","name":"Robert","id":"Robert123","pin":"4242","eyes":"brown"}
{"age":42,"sex":"female","name":"Lisa","id":"Lisa123","pin":"2016","eyes":"brown"}
{"age":60,"sex":"female","name":"Emily","id":"Emily123","pin":"8119","eyes":"brown"}
{"age":50,"sex":"male","name":"Max","id":"Max123","pin":"4061","eyes":"brown"}
{"age":54,"sex":"male","name":"Robert","id":"Robert123","pin":"5378","eyes":"brown"}
{"age":52,"sex":"female","name":"Emily","id":"Emily123","pin":"4765","eyes":"brown"}
{"age":38,"sex":"male","name":"Robert","id":"Robert123","pin":"8901","eyes":"brown"}
{"age":39,"sex":"female","name":"Emily","id":"Emily123","pin":"6529","eyes":"blue"}
{"age":28,"sex":"male","name":"Max","id":"Max123","pin":"6623","eyes":"brown"}

Find more examples here.

Find more information about the project here.

Visual Studio Code Extension

The VS Code Extension provides editing assistance (Intellisense) for .ranger files.

Supported Features

• Syntax highlighting
• Auto completion
• Go to definition
• Hover
• Validations
• Quick Fixes
• Code formatting

Getting Started

1. Install Visual Studio Code.

2. Install the Ranger extension.

3. Open a folder in VS Code.

4. Create a new file Customer.ranger.

5. Paste the following content into the file

   Entity Customer {
       age: random(20..60)
       sex: random("male", "female")
       name: map(sex => [
           random("James", "Robert", "Max"),
           random("Emily", "Lucy", "Lisa"),
       ])
       id: f"{name}123"
       pin: /\d{4}/
       eyes: weighted("brown":80, "blue":20)
   }
   

6. While editing, right click the editor -> click Ranger: Generate File.