Class: Cucumber::Parser::CityBuilder

Inherits:
Gherkin::AstBuilder
  • Object
show all
Defined in:
lib/cucumber/city_builder.rb

Instance Method Summary collapse

Constructor Details

#initialize(file) ⇒ CityBuilder

The Gherkin Parser is going to call the various methods within this class as it finds items. This is similar to how Cucumber generates it’s Abstract Syntax Tree (AST). Here instead this generates the various YARD::CodeObjects defined within this template.

A namespace is specified and that is the place in the YARD namespacing where all cucumber features generated will reside. The namespace specified is the root namespaces.

Parameters:

  • file (String) —

    the name of the file which the content belongs



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# File 'lib/cucumber/city_builder.rb', line 17

def initialize(file)
  super()
  @namespace = YARD::CodeObjects::Cucumber::CUCUMBER_NAMESPACE
  find_or_create_namespace(file)
  @file = file
end

Instance Method Details

#ast ⇒ YARD::CodeObject::Cucumber::Feature

Return the feature that has been defined. This method is the final method that is called when all the work is done. It is called by the feature parser to return the complete Feature object that was created

Returns:

  • (YARD::CodeObject::Cucumber::Feature) —

    the completed feature

See Also:



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# File 'lib/cucumber/city_builder.rb', line 31

def ast
  feature(get_result) unless @feature
  @feature
end

#background(background) ⇒ Object

Called when a background has been found

See Also:



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# File 'lib/cucumber/city_builder.rb', line 131

def background(background)
  #log.debug "BACKGROUND"

  @background = YARD::CodeObjects::Cucumber::Scenario.new(@feature,"background") do |b|
    b.comments = background[:comments] ? background[:comments].map{|comment| comment.value}.join("\n") : ''
    b.description = background[:description] || ''
    b.keyword = background[:keyword]
    b.value = background[:name]
    b.add_file(@file,background[:location][:line])
  end

  @feature.background = @background
  @background.feature = @feature
  @step_container = @background
  background[:steps].each { |s|
    step(s)
  }
end

#eof ⇒ Object

Defined in the cucumber version so left here. No events for the end-of-file



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# File 'lib/cucumber/city_builder.rb', line 370

def eof
end

#examples(examples, outline) ⇒ Object

Examples for a scenario outline are called here. This section differs from the Cucumber parser because here each of the examples are exploded out here as individual scenarios and step definitions. This is so that later we can ensure that we have all the variations of the scenario outline defined to be displayed.



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# File 'lib/cucumber/city_builder.rb', line 259

def examples(examples, outline)
  #log.debug "EXAMPLES"
  return if has_exclude_tags?(examples[:tags].map { |t| t[:name].gsub(/^@/, '') })
  example = YARD::CodeObjects::Cucumber::ScenarioOutline::Examples.new(:keyword => examples[:keyword],
                                                                       :name => examples[:name],
                                                                       :line => examples[:location][:line],
                                                                       :comments => examples[:comments] ? examples.comments.map{|comment| comment.value}.join("\n") : '',
                                                                       :rows => [],
                                                                       :tags => [],
                                                                       :scenario => outline )

  unless !examples[:tags].any?
    examples[:tags].each {|example_tag| find_or_create_tag(example_tag[:name], example)}
  end

  example.rows = [examples[:tableHeader][:cells].map{ |c| c[:value] }] if examples[:tableHeader]
  example.rows += matrix(examples[:tableBody]) if examples[:tableBody]

  # add the example to the step containers list of examples

  @step_container.examples << example

  # For each example data row we want to generate a new scenario using our
  # current scenario as the template.

  example.data.length.times do |row_index|

    # Generate a copy of the scenario.

    scenario = YARD::CodeObjects::Cucumber::Scenario.new(@step_container,"example_#{@step_container.scenarios.length + 1}") do |s|
      s.comments = @step_container.comments
      s.description = @step_container.description
      s.add_file(@file,@step_container.line_number)
      s.keyword = @step_container.keyword
      s.value = "#{@step_container.value} (#{@step_container.scenarios.length + 1})"
    end

    # Generate a copy of the scenario steps.

    @step_container.steps.each do |step|
      step_instance = YARD::CodeObjects::Cucumber::Step.new(scenario,step.line_number) do |s|
        s.keyword = step.keyword.dup
        s.value = step.value.dup
        s.add_file(@file,step.line_number)

        s.text = step.text.dup if step.has_text?
        s.table = clone_table(step.table) if step.has_table?
      end

      # Look at the particular data for the example row and do a simple
      # find and replace of the <key> with the associated values.

      example.values_for_row(row_index).each do |key,text|
        text ||= "" #handle empty cells in the example table
        step_instance.value.gsub!("<#{key}>",text)
        step_instance.text.gsub!("<#{key}>",text) if step_instance.has_text?
        step_instance.table.each{|row| row.each{|col| col.gsub!("<#{key}>",text)}} if step_instance.has_table?
      end

      # Connect these steps that we created to the scenario we created
      # and then add the steps to the scenario created.

      step_instance.scenario = scenario
      scenario.steps << step_instance
    end

    # Add the scenario to the list of scenarios maintained by the  feature
    # and add the feature to the scenario

    scenario.feature = @feature
    @step_container.scenarios << scenario

  end

  return example
end

#feature(document) ⇒ Object

Each feature found will call this method, generating the feature object. This is once, as the gherkin parser does not like multiple feature per file.



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# File 'lib/cucumber/city_builder.rb', line 90

def feature(document)
  #log.debug "FEATURE"
  feature = document[:feature]
  return unless document[:feature]
  return if has_exclude_tags?(feature[:tags].map { |t| t[:name].gsub(/^@/, '') })

  @feature = YARD::CodeObjects::Cucumber::Feature.new(@namespace,File.basename(@file.gsub('.feature','').gsub('.','_'))) do |f|
    f.comments = feature[:comments] ? feature[:comments].map{|comment| comment[:text]}.join("\n") : ''
    f.description = feature[:description] || ''
    f.add_file(@file,feature[:location][:line])
    f.keyword = feature[:keyword]
    f.value = feature[:name]
    f.tags = []

    feature[:tags].each {|feature_tag| find_or_create_tag(feature_tag[:name],f) }
  end

  background(feature[:background]) if feature[:background]

  feature[:children].each do |child|
    case child[:type]
      when :Background
        background(child)
      when :ScenarioOutline
        outline = scenario_outline(child)
        @feature.total_scenarios += outline.scenarios.size
      when :Scenario
        scenario(child)
    end
  end

  @feature.tags.each do |feature_tag|
    tag_code_object = YARD::Registry.all(:tag).find {|tag| tag.name.to_s == feature_tag[:name].to_s }
    tag_code_object.total_scenarios += @feature.total_scenarios
  end
end

#find_or_create_namespace(file) ⇒ Object

Feature that are found in sub-directories are considered, in the way that I chose to implement it, in another namespace. This is because when you execute a cucumber test run on a directory any sub-directories of features will be executed with that directory so the file is split and then namespaces are generated if they have not already have been.

The other duty that this does is look for a README.md file within the specified directory of the file and loads it as the description for the namespace. This is useful if you want to give a particular directory some flavor or text to describe what is going on.



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# File 'lib/cucumber/city_builder.rb', line 48

def find_or_create_namespace(file)
  @namespace = YARD::CodeObjects::Cucumber::CUCUMBER_NAMESPACE

  File.dirname(file).split('/').each do |directory|
    @namespace = @namespace.children.find {|child| child.is_a?(YARD::CodeObjects::Cucumber::FeatureDirectory) && child.name.to_s == directory } ||
      @namespace = YARD::CodeObjects::Cucumber::FeatureDirectory.new(@namespace,directory) {|dir| dir.add_file(directory)}
  end

  if @namespace.description == "" && File.exists?("#{File.dirname(file)}/README.md")
    @namespace.description = File.read("#{File.dirname(file)}/README.md")
  end
end

#find_or_create_tag(tag_name, parent) ⇒ Object

Find the tag if it exists within the YARD Registry, if it doesn’t then create it.

We note that the tag was used in this file at the current line.

Then we add the tag to the current scenario or feature. We also add the feature or scenario to the tag.

Parameters:

  • tag_name (String) —

    the name of the tag

  • parent (parent) —

    the scenario or feature that is going to adopt this tag.



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# File 'lib/cucumber/city_builder.rb', line 74

def find_or_create_tag(tag_name,parent)
  #log.debug "Processing tag #{tag_name}"
  tag_code_object = YARD::Registry.all(:tag).find {|tag| tag.value == tag_name } ||
    YARD::CodeObjects::Cucumber::Tag.new(YARD::CodeObjects::Cucumber::CUCUMBER_TAG_NAMESPACE,tag_name.gsub('@','')) {|t| t.owners = [] ; t.value = tag_name ; t.total_scenarios = 0}

  tag_code_object.add_file(@file,parent.line)

  parent.tags << tag_code_object unless parent.tags.find {|tag| tag == tag_code_object }
  tag_code_object.owners << parent unless tag_code_object.owners.find {|owner| owner == parent}
end

#scenario(statement) ⇒ Object

Called when a scenario has been found

- create a scenario
- assign the scenario to the feature
- assign the feature to the scenario
- find or create tags associated with the scenario

The scenario is set as the @step_container, which means that any steps found before another scenario is defined belong to this scenario

Parameters:

  • statement (Scenario) —

    is a scenario object returned from Gherkin

See Also:



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# File 'lib/cucumber/city_builder.rb', line 163

def scenario(statement)
  #log.debug "SCENARIO"

  return if has_exclude_tags?(statement[:tags].map { |t| t[:name].gsub(/^@/, '') })

  scenario = YARD::CodeObjects::Cucumber::Scenario.new(@feature,"scenario_#{@feature.scenarios.length + 1}") do |s|
    s.comments = statement[:comments] ? statement[:comments].map{|comment| comment.value}.join("\n") : ''
    s.description = statement[:description] || ''
    s.add_file(@file,statement[:location][:line])
    s.keyword = statement[:keyword]
    s.value = statement[:name]

    statement[:tags].each {|scenario_tag| find_or_create_tag(scenario_tag[:name],s) }
  end

  scenario.feature = @feature
  @feature.scenarios << scenario
  @step_container = scenario
  statement[:steps].each { |s|
    step(s)
  }

  # count scenarios for scenario level tags
  scenario.tags.uniq.each { |scenario_tag|
    if !scenario.feature.tags.include?(scenario_tag)
      tag_code_object = YARD::Registry.all(:tag).find {|tag| tag.name.to_s == scenario_tag[:name].to_s }
      tag_code_object.total_scenarios += 1
    end
  }
end

#scenario_outline(statement) ⇒ Object

Called when a scenario outline is found. Very similar to a scenario, the ScenarioOutline is still a distinct object as it can contain multiple different example groups that can contain different values.

See Also:



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# File 'lib/cucumber/city_builder.rb', line 201

def scenario_outline(statement)
  #log.debug "SCENARIO OUTLINE"

  return if has_exclude_tags?(statement[:tags].map { |t| t[:name].gsub(/^@/, '') })

  outline = YARD::CodeObjects::Cucumber::ScenarioOutline.new(@feature,"scenario_#{@feature.scenarios.length + 1}") do |s|
    s.comments = statement[:comments] ? statement[:comments].map{|comment| comment.value}.join("\n") : ''
    s.description = statement[:description] || ''
    s.add_file(@file,statement[:location][:line])
    s.keyword = statement[:keyword]
    s.value = statement[:name]

    statement[:tags].each {|scenario_tag| find_or_create_tag(scenario_tag[:name],s) }
  end

  outline.feature = @feature
  @step_container = outline
  statement[:steps].each { |s|
    step(s)
  }

  statement[:examples].each { |e|
    example = examples(e, outline)
  }

  @feature.scenarios << outline

  # count scenarios for scenario outline level tags
  outline.tags.uniq.each { |outline_tag|
    if !outline.feature.tags.include?(outline_tag)
      tag_code_object = YARD::Registry.all(:tag).find {|tag| tag.name.to_s == outline_tag[:name].to_s }
      tag_code_object.total_scenarios += outline.scenarios.size
    end
  }

  # count scenarios for example table level tags
  outline.examples.each { |example|
    unless !example.tags.any?
      example.tags.uniq.each { |example_tag|
        if !outline.feature.tags.include?(example_tag) && !outline.tags.include?(example_tag)
          tag_code_object = YARD::Registry.all(:tag).find {|tag| tag.name.to_s == example_tag[:name].to_s }
          tag_code_object.total_scenarios += example.data.size
        end
      }
    end
  }

  return outline
end

#step(step) ⇒ Object

Called when a step is found. The step is refered to a table owner, though not all steps have a table or multliline arguments associated with them.

If a multiline string is present with the step it is included as the text of the step. If the step has a table it is added to the step using the same method used by the Cucumber Gherkin model.



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# File 'lib/cucumber/city_builder.rb', line 344

def step(step)
  #log.debug "STEP"

  @table_owner = YARD::CodeObjects::Cucumber::Step.new(@step_container,"#{step[:location][:line]}") do |s|
    s.keyword = step[:keyword]
    s.value = step[:text]
    s.add_file(@file,step[:location][:line])
  end

  @table_owner.comments = step[:comments] ? step[:comments].map{|comment| comment.value}.join("\n") : ''

  multiline_arg = step[:argument]

  case(multiline_arg[:type])
  when :DocString
    @table_owner.text = multiline_arg[:content]
  when :DataTable
    #log.info "Matrix: #{matrix(multiline_arg).collect{|row| row.collect{|cell| cell.class } }.flatten.join("\n")}"
    @table_owner.table = matrix(multiline_arg[:rows])
  end if multiline_arg

  @table_owner.scenario = @step_container
  @step_container.steps << @table_owner
end

#syntax_error(state, event, legal_events, line) ⇒ Object

When a syntax error were to occurr. This parser is not interested in errors



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# File 'lib/cucumber/city_builder.rb', line 374

def syntax_error(state, event, legal_events, line)
  # raise "SYNTAX ERROR"
end