Module: Cucumber::Glue::ProtoWorld

Defined in:
lib/cucumber/glue/proto_world.rb

Overview

Defines the basic API methods availlable in all Cucumber step definitions.

You can, and probably should, extend this API with your own methods that make sense in your domain. For more on that, see Dsl#World

Constant Summary collapse

AnsiEscapes = 
Cucumber::Gherkin::Formatter::AnsiEscapes

Class Method Summary collapse

Instance Method Summary collapse

Class Method Details

.for(runtime, language) ⇒ Object

Dynamially generate the API module, closuring the dependencies


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# File 'lib/cucumber/glue/proto_world.rb', line 126

def self.for(runtime, language)
  Module.new do
    def self.extended(object)
      # wrap the dynamically generated module so that we can document the methods
      # for yardoc, which doesn't like define_method.
      object.extend(ProtoWorld)
    end

    # TODO: pass these in when building the module, instead of mutating them later
    # Extend the World with user-defined modules
    def add_modules!(world_modules, namespaced_world_modules)
      add_world_modules!(world_modules)
      add_namespaced_modules!(namespaced_world_modules)
    end

    define_method(:step) do |name, raw_multiline_arg = nil|
      location = Core::Ast::Location.of_caller
      runtime.invoke_dynamic_step(name, MultilineArgument.from(raw_multiline_arg, location))
    end

    define_method(:steps) do |steps_text|
      location = Core::Ast::Location.of_caller
      runtime.invoke_dynamic_steps(steps_text, language, location)
    end

    # rubocop:disable UnneededInterpolation
    define_method(:puts) do |*messages|
      # Even though they won't be output until later, converting the messages to
      # strings right away will protect them from modifications to their original
      # objects in the mean time
      messages.collect! { |message| "#{message}" }

      runtime.puts(*messages)
    end
    # rubocop:enable UnneededInterpolation

    define_method(:ask) do |question, timeout_seconds = 60|
      runtime.ask(question, timeout_seconds)
    end

    define_method(:embed) do |file, mime_type, label = 'Screenshot'|
      runtime.embed(file, mime_type, label)
    end

    # Prints the list of modules that are included in the World
    def inspect
      modules = [self.class]
      (class << self; self; end).instance_eval do
        modules += included_modules
      end
      modules << stringify_namespaced_modules
      format('#<%s:0x%x>', modules.join('+'), self.object_id)
    end

    private

    # @private
    def add_world_modules!(modules)
      modules.each do |world_module|
        extend(world_module)
      end
    end

    # @private
    def add_namespaced_modules!(modules)
      @__namespaced_modules = modules
      modules.each do |namespace, world_modules|
        world_modules.each do |world_module|
          variable_name = "@__#{namespace}_world"

          inner_world = if self.class.respond_to?(namespace)
                          instance_variable_get(variable_name)
                        else
                          Object.new
                        end
          instance_variable_set(variable_name,
                                inner_world.extend(world_module))
          self.class.send(:define_method, namespace) do
            instance_variable_get(variable_name)
          end
        end
      end
    end

    # @private
    def stringify_namespaced_modules
      @__namespaced_modules.map { |k, v| "#{v.join(',')} (as #{k})" }.join('+')
    end
  end
end

Instance Method Details

#ask(question, timeout_seconds = 60) ⇒ Object

Pause the tests and ask the operator for input


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# File 'lib/cucumber/glue/proto_world.rb', line 87

def ask(question, timeout_seconds = 60)
  super
end

#embed(file, mime_type, label = 'Screenshot') ⇒ Object

Embed an image in the output


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# File 'lib/cucumber/glue/proto_world.rb', line 92

def embed(file, mime_type, label = 'Screenshot')
  super
end

#inspect ⇒ Object

Prints the list of modules that are included in the World


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# File 'lib/cucumber/glue/proto_world.rb', line 116

def inspect
  super
end

#pending(message = 'TODO') ⇒ Object

Mark the matched step as pending.


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# File 'lib/cucumber/glue/proto_world.rb', line 97

def pending(message = 'TODO')
  if block_given?
    begin
      yield
    rescue Exception
      raise Pending, message
    end
    raise Pending, "Expected pending '#{message}' to fail. No Error was raised. No longer pending?"
  else
    raise Pending, message
  end
end

#puts(*messages) ⇒ Object

Note:

Cucumber might surprise you with the behaviour of this method. Instead of sending the output directly to STDOUT, Cucumber will intercept and cache the message until the current step has finished, and then display it.

If you'd prefer to see the message immediately, call Kernel.puts instead.

Print a message to the output.


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# File 'lib/cucumber/glue/proto_world.rb', line 82

def puts(*messages)
  super
end

#skip_this_scenario(message = 'Scenario skipped') ⇒ Object

Skips this step and the remaining steps in the scenario

Raises:

  • (Core::Test::Result::Skipped) 

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# File 'lib/cucumber/glue/proto_world.rb', line 111

def skip_this_scenario(message = 'Scenario skipped')
  raise Core::Test::Result::Skipped, message
end

#step(name, raw_multiline_arg = nil) ⇒ Object

Run a single Gherkin step

Examples:

Call another step

step "I am logged in"

Call a step with quotes in the name

step %{the user "Dave" is logged in}

Passing a table

step "the following users exist:", table(%{
  | name  | email           |
  | Matt  | [email protected]   |
  | Aslak | [email protected] |
})

Passing a multiline string

step "the email should contain:", "Dear sir,\nYou've won a prize!\n"

Parameters:

  • name (String) —

    The name of the step

  • multiline_argument (String, Cucumber::Ast::DocString, Cucumber::Ast::Table) 

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# File 'lib/cucumber/glue/proto_world.rb', line 28

def step(name, raw_multiline_arg = nil)
  super
end

#steps(steps_text) ⇒ Object

Run a snippet of Gherkin

Examples:

steps %{
  Given the user "Susan" exists
  And I am logged in as "Susan"
}

Parameters:

  • steps_text (String) —

    The Gherkin snippet to run


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# File 'lib/cucumber/glue/proto_world.rb', line 39

def steps(steps_text)
  super
end

#table(text_or_table, file = nil, line = 0) ⇒ Object

Parse Gherkin into a Ast::Table object.

Useful in conjunction with the #step method. Returns a Cucumber::MultilineArgument::DataTable for text_or_table, which can either be a String:

table(%{
  | account | description | amount |
  | INT-100 | Taxi        | 114    |
  | CUC-101 | Peeler      | 22     |
})

or a 2D Array:

table([
  %w{ account description amount },
  %w{ INT-100 Taxi        114    },
  %w{ CUC-101 Peeler      22     }
])

Examples:

Create a table

users = table(%{
  | name  | email           |
  | Matt  | [email protected]   |
  | Aslak | [email protected] |
})

Parameters:

  • text_or_table (String) —

    The Gherkin string that represents the table


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# File 'lib/cucumber/glue/proto_world.rb', line 70

def table(text_or_table, file = nil, line = 0)
  location = !file ? Core::Ast::Location.of_caller : Core::Ast::Location.new(file, line)
  MultilineArgument::DataTable.from(text_or_table, location)
end

#to_s ⇒ Object

see #inspect


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# File 'lib/cucumber/glue/proto_world.rb', line 121

def to_s
  inspect
end