Gatling Blueprint Extensions

Introduction

This project contains some utility methods I found useful for Gatling projects

• Pretty-Printing Boon JSON objects
• Hierarchical Directory Search
• Simulation coordinates

Pretty-Printing Boon JSON Objects

Since I'm using Gatling also for functional testing some JSON handling would be extremly helpful

• Pretty-print the JSON to have a meaningful diff
• Remove some parts of the JSON objects on the fly, e.g. UUID or timestamps

Usage is straight-forward

// Pretty-print JSON
FilteringJsonPrettyPrinter.print(departmentJson);

// Pretty-print and remove "id" element
FilteringJsonPrettyPrinter.print(departmentJson, "id");

// Pretty-print and remove "employees" tree
FilteringJsonPrettyPrinter.print(departmentJson, "employees");

Please note that removing of JSON elements do not use JSON path expression - that would be awesone but difficult to implement.

Hierarchical Directory Search

A common pattern to configure test scenarios is to pick up configuration files along a directory tree - you start at a leaf directory and walk up until you hit the configured root directory

• Locate the first matching CSV file containing user credentials
• Locate a list of property files to merge them in the correct order

This is implemented by HierarchicalFileLocator and PropertiesResolver.

Simulation Coordinates

This is a rather abstract concept to identify a test scenario being executed by

• tenant
• application
• site
• scope

The SimulationCoordinates are used to implement managable multi-tenant performance tests

In short the SimulationCoordinates define a hierarchical directory tree which used to pick up various configuration files - tweaking the configuration of a complex test setup turns to providing and/or editing a configuration file.