Why does behat call my context class twice?

Question

When I want run my behat test like in this tutorial, I get an error message:

➜  test.dev bin/behat --suite=system
PHP Fatal error:  Cannot redeclare class SystemContext in /Applications/MAMP/htdocs/test.dev/features/bootstrap/SystemContex.php on line 12

And I do not know why, because I wrote my behat.yml like at this page:

default:
    suites:
        site:
            paths: [ %paths.base%/features/site ]
            contexts: [ SiteContext ]
        system:
            paths: [ %paths.base%/features/system ]
            contexts: [ SystemContex ]
extensions:
    MageTest\MagentoExtension\Extension: ~
    Behat\MinkExtension:
        base_url: 'http://test.dev/'
        selenium2:
            wd_host: http://127.0.0.1:4444/wd/hub
            browser: firefox

My file structure is like:

project-dir
├── behat.yml
├── bin
│   └── behat
├── composer.json
├── composer.lock
├── features
│   ├── bootstrap
│   │   ├── FeatureContext.php
│   │   ├── SiteContext.php
│   │   └── SystemContext.php
│   ├── site
│   │   └── ...
│   └── system
│       └── check_baseurl.feature
├── htdocs
│   ├── app
│   ├── downloader
│   ├── index.php
│   ├── js
│   ├── skin
│   ├── var
│   └── ...
└── vendor
    ├── autoload.php
    ├── behat
    ├── magetest
    └── ...

Answer 1

Important: several problems occur because you copy and paste behat.yml from website to your behat.yml - there are sometimes whitespaces, that you can't see but will effect your behat system!!!

You should re-write the behat.yml, the context mentioned in behat.yml is wrong. It should be as follow.

default:

suites:

default:

paths:

features: features/site

contexts:

- SiteContext

system:

paths:
 [ %paths.base%/features/system ] contexts:
 [ SystemContext
 ]

By default context is searched in bootstrap folder, you just have to mention the filename of the context file.

And to execute the suite execute the following command

bin/behat --suite=system

Note: use bin/behat in command if you are executing suite from project root directory. If you are in bin folder just use behat before execution