A class to parse csv document

casanova.gemspec

Gem::Specification.new do |s|
  s.name        = "casanova"
  s.version     = "0.1.0"
  s.platform    = Gem::Platform::RUBY
  s.author      = "Robin Clart"
  s.email       = "robin@clart.be"
  s.summary     = ""
  s.description = ""

  s.files         = ["casanova.rb"]
  s.test_file     = "casanova_spec.rb"
  s.require_path  = "."

  s.add_development_dependency "minitest", ["~> 2.12"]
end

casanova.rb

#--
# Copyright (c) 2012 Robin Clart
#
# Permission is hereby granted, free of charge, to any person obtaining
# a copy of this software and associated documentation files (the
# "Software"), to deal in the Software without restriction, including
# without limitation the rights to use, copy, modify, merge, publish,
# distribute, sublicense, and/or sell copies of the Software, and to
# permit persons to whom the Software is furnished to do so, subject to
# the following conditions:
#
# The above copyright notice and this permission notice shall be
# included in all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
# EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
# NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
# LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
# OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
# WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
#++

# A class to convert CSV document into a nicer format.
#
# Example:
#
#   statistics = Casanova.new(document)
#   statistics.to_a(:type, :id, :date, :note)
#   # => [{:type=>"page", :id=>"21", :date=>"04-04-2012 15:40", :note=>""}, ...]
class Casanova

  def initialize(document)
    @document = document
  end

  # Returns an Array of Hashes with the specified keys.
  def to_a(*keys)
    @document.split("\n").map { |l| Hash[keys.zip(l.split(",", keys.size))] }
  end

end

casanova_spec.rb

gem "minitest"
require "minitest/autorun"
require File.expand_path("casanova")

describe Casanova do

  subject { Casanova.new("page,48,20120327143524\npage,45,20120327143638") }

  describe "#to_a" do

    let(:keys) { [:type, :ref, :date] }

    it "should return an array of hashes with the specified keys" do
      subject.to_a(*keys).must_be_instance_of Array
      subject.to_a(*keys).first.must_be_instance_of Hash
      subject.to_a(*keys).first.length.must_equal 3
      subject.to_a(*keys).must_equal [
        { type: "page", ref: "48", date: "20120327143524"},
        { type: "page", ref: "45", date: "20120327143638"}
      ]
    end

  end

end