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Front end load testing

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# Felt
Front end load testing with PhantomJS/SlimerJS, sponsored by [CoScale](http://www.coscale.com)

## Description
Felt is a front-end load tester. It generates load by running a lot of browser instances simultaneously and waiting for the page to finish loading (no more pending resource calls). The tool uses [PhantomJS](http://phantomjs.org/) or [SlimerJS](https://slimerjs.org/). You can use Felt to quickly generate load on front end heavy applications. With  scenarios you can setup a path through your application for the browsers to follow.

## Use cases

* Load testing
    * AngularJS
    * React
    * Backbone.js
    * Ember.js
* Cache warming
* Quick local load tests
* Synthetic monitoring

## Features

* Real browser load testing of web applications
* Works with PhantomJS (webkit) and SlimerJS (firefox)
* Scenarios

## Requirements

* Tested on Python 2.7.10
* Unix based operating system
* Local install of [PhantomJS](http://phantomjs.org/download.html) or [SlimerJS](https://slimerjs.org/download.html) available in PATH
* Install commentjson (`pip install commentjson`)

## Quick start

1. `git clone https://github.com/kidk/felt.git`
1. `cd felt`
1. Download PhantomJS from http://phantomjs.org/download.html
1. Unzip and move PhantomJS executable into felt directory

The felt directory should look something like this:
        $ ls
        LICENSE		README.md	js		main.py		phantomjs
1. pip install commentjson
1. `python main.py --verbose examples/basic.json`
1. `ctrl + c` to stop

## Usage
```
usage: main.py [-h] [--debug] [--verbose] [--threads THREADS] [--test] [--screenshot]
               scenario

Start workload.

positional arguments:
  scenario

optional arguments:
  -h, --help         show this help message and exit
  --debug            enable debug information
  --verbose          makes generator more verbose
  --threads THREADS  number of threads to run simultaneously
  --test             run a scenario only once
  --screenshot       save screenshot per step
```

## Actions list

* `open_url` - Open browser and navigate to url.

Attributes:
  * `value`: Url to open

* `set_value` - Set value attribute in an element
  
  Attributes:
  * `selector` - Value for `querySelector`
  * `value` - Value to insert into element

* `submit` - Send submit event to element
  
  Attributes:
  * `selector` - Value for `querySelector`

* `click` - Send click event to element (if selector returns multiple elements, first one is clicked)
  
  Attributes:
  * `selector` - Value for `querySelectorAll`

* `click_one` - Send click event to random selected element
  
  Attributes:
  * `selector` - Value for `querySelectorAll`

* `sleep` - Wait for x miliseconds
  
  Attributes:
  * `value` - Amount in ms you want function to wait or object with min, max to wait a random time between min and max

* `wait_for_element` - Wait for element to appear in browser
  
  Attributes:
  * `selector` - Value for `querySelector`

* `check_element_exists` - Check if element is present and contains content
  
  Attributes:
  * `selector` - Value for `querySelector`

## Development
Included in this repository is a [Vagrant](https://www.vagrantup.com/) file which you can use to develop Felt locally. Please don't hesitate to submit bugs, feature requests or pull requests.

## Sponsored by CoScale
<img src="http://docs.coscale.com/gfx/logo.png" alt="CoScale logo" />

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