cucumber-nagios allows you to write high-level behavioural tests of web application, and plug the results into Nagios.
As Bradley Taylor put it:
“Instead of writing boring monitoring plugins from scratch, you can now do behavior driven ops! Transform from a grumpy, misanthropic sysadmin to a hipster, agile developer instantly.”
gem install gemcutter
gem install cucumber-nagios
cucumber-nagios-gen project bunch-o-tests
bin/cucumber-nagios-gen feature ebay.com.au bidding
Setting up a project
To set up a standalone
cucumber-nagios project, run:
cucumber-nagios-gen project <project-name>
This will spit out a bunch of files in the directory specified as
README within this directory for specific instructions for managing
Bundling cucumber-nagios's dependencies allows you to drop your cucumber-nagios project to any machine and have it run. This can be useful if you want to develop your tests on one machine, and deploy them to another (like a production Nagios server).
You'll need to bundle your dependencies to use cucumber-nagios.
First you need to make sure the following dependencies are installed:
- bundler gem (automatically pulled in by the cucumber-nagios gem)
To bundle your dependencies, within your project directory run:
$ gem bundle
Deploying to production
Once you've copied your project around, just run the bundler again:
$ gem bundle
You'll need to have RubyGems and the bundler gem installed on the system you're deploying too. I know, this is not optimal, but hopefully the bundler gem will handle this better in the future.
Once you've set up a project, you can use the
to generate new features. It takes two arguments: the site you're testing, and
feature you're testing:
bin/cucumber-nagios-gen feature gnome.org navigation
This will spit out two files:
As for writing features, you'll want to have a read of the Cucumber documentation, however your tests will look something like this:
Feature: google.com.au To broaden their knowledge A user should be able To search for things Scenario: Searching for things Given I visit "http://www.google.com" When I fill in "q" with "wikipedia" And I press "Google Search" Then I should see "www.wikipedia.org"
There's a collection of steps that will cover most of the things you'll be
testing for in
You can write custom steps for testing specific output and behaviour, e.g.
Feature: smh.com.au It should be up And provide links to content Scenario: Visiting home page When I go to http://smh.com.au/ Then I should see site navigation And there should be a section named "Opinion"
There aren't steps for "Then I should see site navigation", so you have to
write one yourself. :-) In
Then /^I should see site navigation$/ do doc = Nokogiri::HTML(response.body.to_s) doc.css("ul#nav li a").size.should > 5 end
You can use Nokogiri for testing responses with XPath matchers and CSS selectors.
I suggest you use
bin/cucumber directly so you can get better feedback when
writing your tests:
bin/cucumber --require features/ features/smh/smh.feature
This will output using the default 'pretty' formatter.
Invoke the Cucumber feature with the
cucumber-nagios can be run from anywhere:
It should return a standard Nagios-formatted response string:
Critical: 0, Warning: 0, 2 okay | passed=2, failed=0, total=2
Steps that fail will show up in the "Critical" total, and steps that pass show up in the "okay" total.
The value printed at the end is in Nagios's Performance Data format, so it can be graphed and the like.
You can benchmark your features if you need to test response times for a set of site interactions:
Feature: slashdot.com To keep the geek masses satisfied Slashdot must be responsive Scenario: Visiting a responsive front page Given I am benchmarking When I go to http://slashdot.org/ Then the elapsed time should be less than 5 seconds
The elapsed time step can be reused multiple times in the same scenario if you need fine grained testing:
Feature: slashdot.com To keep the geek masses satisfied Slashdot must be responsive Scenario: Visiting news articles Given I am benchmarking When I go to http://slashdot.org/ Then the elapsed time should be less than 5 seconds When I follow "Login" Then the elapsed time should be less than 4 seconds When I follow "Contact" Then the elapsed time should be less than 7 seconds
AMQP Message Queues
You can test for various conditions on an AMQP message queue.
Feature: github.com To make sure the rest of the system is in order All our message queues must not be backed up Scenario: test queue 2 Given I have a AMQP server on rabbit.github.com And I want to check on the fork queue Then it should have less than 400 messages Then it should have at least 5 consumers Then it should have less than 50 messages per consumer
This has been tested using RabbitMQ but uses the amqp gem which should support other backends. See features/amqp_steps.rb for all the available steps.
Failure is an option (exceptions are good)
Exceptions raised within your tests will appear in the failed totals, so you don't need to worry about trying to catch them in your own custom steps.
i.e. if you try fetching a page on a server that is down, or the page returns a 404, the exception raised by Mechanize just gets treated by Cucumber as a test failure.
It's highly recommend that you store your cucumber-nagios projects in a version control system!
To get up and running with git:
$ git init $ git add . $ git commit -m 'created cucumber-nagios project'
To get up and running with bzr:
$ bzr init $ bzr add $ bzr commit -m 'created cucumber-nagios project'
.gitignores are created when you generate a project.
The gem is thoroughly tested (with Cucumber, no less). The gem's Cucumber features live in $gemroot/features/, and can be run with:
$ cucumber --require features/ features/installing.feature $ cucumber --require features/ features/creating.feature $ cucumber --require features/ features/using.feature