Cucumber Tips。 ステップ定義をJSONファイルにダンプ。

dump_step_definitions.rb

# encoding: utf-8
#!/usr/bin/env ruby
require "./runtime"

unless ARGV.include?("--dotcucumber")
  STDERR.puts "Must be specified option --dotcucumber OUTPUT_DIR"
  exit 1
end
runtime = Runtime.new(ARGV.dup)
runtime.write_stepdefs_json

runtime.rb

require "cucumber"

module Cucumber
  class Runtime
    def load
      load_step_definitions
    end
  end
end

class Runtime
  def initialize(args=[])
    @configuration = Cucumber::Cli::Configuration.new(STDOUT, STDERR)
    @configuration.parse!(args)
    @runtime = Cucumber::Runtime.new(@configuration)
    @runtime.load
  end

  def step_match(step_name)
    @runtime.step_match(step_name)
  end

  def write_stepdefs_json
    @runtime.write_stepdefs_json
    puts "write to " + File.expand_path(Dir.glob("#{@configuration.dotcucumber}/*").first) if @configuration.dotcucumber
  end
end

実行結果

# use example: https://github.com/cucumber/cucumber/tree/master/examples/i18n/en/features

$ ruby dump_step_definitions.rb --dotcucumber /path/to/.cucumber/ examples/i18n/en/features
write to /path/to/.cucumber/stepdefs.json

$ cat /path/to/.cucumber/stepdefs.json 
[
  {
    "source": "I have entered (\\d+) into the calculator",
    "flags": "",
    "file_colon_line": "examples/i18n/en/features/step_definitons/calculator_steps.rb:14",
    "steps": [
      {
        "name": "I have entered 2 into the calculator",
        "args": [
          {
            "offset": 15,
            "val": "2"
          }
        ]
      },
      {
        "name": "I have entered 3 into the calculator",
        "args": [
          {
            "offset": 15,
            "val": "3"
          }
        ]
      }
    ]
  },
  {
    "source": "I press (\\w+)",
    "flags": "",
    "file_colon_line": "examples/i18n/en/features/step_definitons/calculator_steps.rb:18",
    "steps": [
      {
        "name": "I press divide",
        "args": [
          {
            "offset": 8,
            "val": "divide"
          }
        ]
      }
    ]
  },
  {
    "source": "the result should be (.*) on the screen",
    "flags": "",
    "file_colon_line": "examples/i18n/en/features/step_definitons/calculator_steps.rb:22",
    "steps": [
      {
        "name": "the result should be 1.5 on the screen",
        "args": [
          {
            "offset": 21,
            "val": "1.5"
          }
        ]
      },
      {
        "name": "the result should be <output> on the screen",
        "args": [
          {
            "offset": 21,
            "val": "<output>"
          }
        ]
      }
    ]
  }
]