class Spinach::Parser::Visitor

The Spinach Visitor traverses the output AST from the GherkinRuby parser and populates its Feature with all the scenarios, tags, steps, etc.

@example

ast     = GherkinRuby.parse(File.read('some.feature'))
visitor = Spinach::Parser::Visitor.new
feature = visitor.visit(ast)

Attributes

feature[R]

Public Class Methods

new() click to toggle source

@param [Feature] feature

The feature to populate,

@api public

# File lib/spinach/parser/visitor.rb, line 19
def initialize
  @feature = Feature.new
end

Public Instance Methods

visit(ast) click to toggle source

@param [GherkinRuby::AST::Feature] ast

The AST root node to visit.

@api public

# File lib/spinach/parser/visitor.rb, line 27
def visit(ast)
  ast.accept(self)

  @feature
end
visit_Background(node) click to toggle source

Iterates over the steps.

@param [GherkinRuby::AST::Scenario] node

The scenario to visit.

@api public

# File lib/spinach/parser/visitor.rb, line 58
def visit_Background(node)
  background      = Background.new(@feature)
  background.line = node.line

  @current_step_set = background
  node.steps.each { |step| step.accept(self) }
  @current_step_set = nil

  @feature.background = background
end
visit_Feature(node) click to toggle source

Sets the feature name and iterates over the feature scenarios.

@param [GherkinRuby::AST::Feature] feature

The feature to visit.

@api public

# File lib/spinach/parser/visitor.rb, line 39
def visit_Feature(node)
  @feature.name        = node.name
  @feature.description = node.description

  node.background.accept(self) if node.background

  @current_tag_set = @feature
  node.tags.each { |tag| tag.accept(self) }
  @current_tag_set = nil

  node.scenarios.each { |scenario| scenario.accept(self) }
end
visit_Scenario(node) click to toggle source

Sets the scenario name and iterates over the steps.

@param [GherkinRuby::AST::Scenario] node

The scenario to visit.

@api public

# File lib/spinach/parser/visitor.rb, line 75
def visit_Scenario(node)
  scenario       = Scenario.new(@feature)
  scenario.name  = node.name
  scenario.lines = [
    node.line,
    *node.steps.map(&:line)
  ].uniq.sort

  @current_tag_set = scenario
  node.tags.each { |tag| tag.accept(self) }
  @current_tag_set = nil

  @current_step_set = scenario
  node.steps.each { |step| step.accept(self) }
  @current_step_set = nil

  @feature.scenarios << scenario
end
visit_Step(node) click to toggle source

Adds the step to the current scenario.

@param [GherkinRuby::AST::Step] step

The step to add.

@api public

# File lib/spinach/parser/visitor.rb, line 110
def visit_Step(node)
  step         = Step.new(@current_step_set)
  step.name    = node.name
  step.line    = node.line
  step.keyword = node.keyword

  @current_step_set.steps << step
end
visit_Tag(node) click to toggle source

Adds the tag to the current scenario.

@param [GherkinRuby::AST::Tag] node

The tag to add.

@api public

# File lib/spinach/parser/visitor.rb, line 100
def visit_Tag(node)
  @current_tag_set.tags << node.name
end