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https://github.com/mpinardi/cucumber-performance-js

A java script implementation of cucumber performance
https://github.com/mpinardi/cucumber-performance-js

bdd concurrent-behavior-driven-testing cucumber cucumber-perf cucumber-performance driven-testing load-testing multiprocess performance-simulations testing testing-tools

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A java script implementation of cucumber performance

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README 

        
# cucumber-perf-js

A performance testing framework for cucumber io.



## What is Cucumber Perf?

Cucumber perf represents a new idea in automated testing development.



### What is Cucumber?

Cucumber is a implementation of Behavior Driven Development (BDD).

Which uses simple natural language scripts to define a software feature.

These executable specifications are written in a language called gherkin.

Example:

```

Feature: Beer

  Scenario: Jeff drinks a beer

  Given: Jeff is of age and has a beer

  And: Jeff opens his beer.

  When: Jeff takes a sip.

  Then: Verify he enjoyed it.

```

These scripts can be used to develop the features themselves but also drive automated tests.



### The issue?

So, you now have a working functional automation test suite.

But you want to run a performance test. This would require either rewriting your existing functional tests or copying a bunch of code.

Also, you would need to create a performance test harness.



Most likely each team will end up with something that is project specific and doesn't use the existing functional code base.



### The fix

Cucumber Perf provides a level of automation on top of Cucumber.

It’s an implementation of a new concept (as far as I know) called Concurrent Behavior Driven Testing (CBDT).



Cucumber perf provides a means to use your existing functional code without writing a single line of code.

It provides the ability to run performance simulations with support for common load testing features:

* Timed Tests

* Multi-Threading

* Thread Count Limits

* Ramp Up/Down

* Data replacing

* Random Wait

* Reporting

* Logging



It uses a type of script called Salad.

Salad is a reimplementation of Cucumber Gherkin with the focus on performance simulations.



```

Plan: Bar visit



Simulation: Jeff drinks 3 beers.

  Group: beer.feature

  Runners: 1

  Count: 3

```

## Plans:

Here is an example plan

```

Plan: test

Simulation: simulation 1

Group test.feature

	#slices

	#these values will replace property "value out"

	|value out|

	|changed value 1|

	|changed value 2|

	#number of threads

	Runners: 2

	#total number of threads to run.

	Count: 2

#a optional random wait mean for before thread runs tests.

#thread will wait between +-50% of this mean

RandomWait: 00:00:02



#Will run all groups for the period below

Simulation Period: simulation 2 period

Group test.feature

	|value out|

	|changed value |

		Threads: 5

		#count is ignored in a simulation period

		Count: 1

#run time

Time: 00:00:30

RampUp: 00:00:10

RampDown: 00:00:10

```

## What is Concurrent Behavior Driven Testing?

Concurrent Behavior Driven Testing is the methodology of creating functional automation that can be used in concurrent test scenarios.

This means coding with the understanding that each functional test could be used in a multithreaded environment.



CBDT requires an automation team to follow strict guidelines when coding functional test cases.

Being careful to avoid static variables and race conditions that will cause failures in a multi-threaded world.

This of course requires a larger understanding of programing or a least team leadership that can enforce these guidelines.



## Getting Started

It takes planning to implement Cucumber Perf.



Your functional automation should follow these rules:

* Use a non specific test harness. This should standardize all your common functions.

* Do not use static variables! Your code must work in a multithreaded world.

* Properly comment your features and scenarios. You want to keep track of what scenarios can be run multithreaded.



Follow directions in [wiki](https://github.com/mpinardi/cucumber-performance-js/wiki) to get up and running.



### Installing

[npm i cucumber-perf](https://www.npmjs.com/package/cucumber-perf)



## Versioning

We use [SemVer](http://semver.org/) for versioning. For the versions available, see the [tags on this repository](https://github.com/your/project/tags). 



## License

This project is licensed under the MIT License - see the [LICENSE.md](LICENSE.md) file for details