unobtainium-cucumber

Cucumber specific extensions to unobtainium.

Instead of requiring unobtainium in your cucumber project, just require this gem. It'll automatically some cucumber specific features to your project:

• Reset the driver after each scenario.
• Take screenshots on failures.

Of course, each of these can be configured.

Usage

The project's own cucumber-based test suite demonstrates most of the details.

In brief, all the setup happens in the features/support/env.rb file:

require "unobtainium-cucumber"

And that's it.

Configuration

All configuration for this gem happens in the config.yml read in by unobtainium. All configuration keys respected in this gem live under the top-level cucumber key, i.e.:

# config.yaml
cucumber:
  # this gem's keys go here

Driver Reset

By default, the driver's #reset function is called after each scenario for drivers that respond to such a function.

You can switch this off with the cucumber.driver_reset flag:

# config.yaml
cucumber:
  driver_reset: false

• If the flag is false, driver reset is switched off.
• If the flag is undefined (i.e. nil) or any other value, driver reset is switched on. The recommended value to switch it on explicitly is, of course, true.

Status Actions

One of the convenient features of this gem is that it allows you to cleanly define callbacks for a particular scenario status.

It's an extension of the After hook that allows you to specify whether your callback is invoked after a Scenario or Scenario Outline (or both), and only it has #passed? or is #failed? (or both). Status actions thus are actions triggered by a scenario status.

Status actions can be any function or block that takes two arguments, the cucumber World object, and the scenario itself (for further querying).

You can register them by including the StatusActions module in World, and then calling #register_action:

World(StatusActions)

# ...

Given(/I foo/) do
  # Registers #some_func for passed scenarios and outlines
  register_action(:passed?, method(:some_func))

  # Limits registration to outlines
  register_action(:failed?, method(:some_func), type: :outline)

  # Registers a block
  register_action(:failed?) do |world, scenario|
    # ...
  end
end

There are a number of other methods in the StatusActions module that you can use, but this is by far the most important.

Configuration

Of course, the above is for programmatically adding actions. But unobtainium is configuration driven, so it makes sense to configure status actions in this gem:

# config.yaml
cucumber:
  status_actions:
    passed?:
      - global_action
    failed?:
      outline:
        - dummy_action
      scenario:
        - method_from_own_extension

Note how you can either provide an Array of method names to a status key, or further divide the status key into individual lists for outlines and scenarios.

Builtin Status Actions

There are not many status actions built into this gem, although that number may rise. Currently, there is:

• #store_screenshot writes a browser screenshot to the screenshots directory.
• #store_content writes a dump of the page content to the content directory.

File names are timestamped, and include the scenario name. That should make debugging a failed scenario easier.

If you do not configure any actions, the default is to take screenshots after any failure.

Custom Actions

As demonstrated earlier, custom actions are easy to define. If they are resolvable before a scenario starts (i.e. files are appropriately required), then you can configure them as string names in the configuration.

You can specify any method of the World object, so any from your own exentsions to World. Alternatively, any function that is resolvable works. You might have to use fully qualified names.

Custom actions have limited support facilities in the Action::Support module. Check it out if you write your own.

Cucumber Events

Cucumber provides an event bus which lets you register handlers for cucumber's own events. While that is going to be very helpful for hooking into the flow of execution, this gem adds octiron for further event processing, by publishing all cucumber events on octiron's event bus.

Require unobtainium-cucumber as before, but also require the event processing code:

# env.rb
require 'unobtainium-cucumber'
require 'unobtainium-cucumber/octiron_events'

World(Octiron::World)

You can now register transmogrifiers for any of the cucumber event classes, and use the power of octiron's event processing pipeline.