Contents

module TestFileFinder
  module MappingStrategies
    class PatternMatching
      attr_reader :pattern_matchers

      def self.load(mapping_file)
        content = File.read(mapping_file)
        maps = YAML.load(content)['mapping']

        validate(maps)

        new do |mapping|
          maps.each do |map|
            source = map['source']
            test = map['test']
            mapping.relate(source, test)
          end
        end
      end

      def self.validate(maps)
        raise InvalidMappingFileError, 'missing `mapping` in test mapping file' if maps.nil?
        raise InvalidMappingFileError, 'missing `source` or `test` in test mapping file' if maps.any? { |map| incomplete?(map) }
      end

      def self.incomplete?(map)
        map['source'].nil? || map['test'].nil?
      end

      def self.default_rails_mapping
        new do |mapping|
          mapping.relate(%r{^app/(.+)\.rb$}, 'spec/%s_spec.rb')
          mapping.relate(%r{^lib/(.+)\.rb$}, 'spec/lib/%s_spec.rb')
          mapping.relate(%r{^spec/(.+)_spec.rb$}, 'spec/%s_spec.rb')
        end
      end

      def initialize
        @pattern_matchers = []

        yield self if block_given?
      end

      def relate(source, test)
        @pattern_matchers << pattern_matcher_for(source, test)
      end

      def match(files)
        @pattern_matchers.inject(Set.new) do |result, pattern_matcher|
          test_files = pattern_matcher.call(files)
          result.merge(test_files)
        end.to_a
      end

      private

      def pattern_matcher_for(source, test)
        regexp = %r{^#{source}$}

        proc do |files|
          Array(files).flat_map do |file|
            if (match = regexp.match(file))
              test % match.captures
            end
          end.compact
        end
      end
    end
  end
end

Version data entries

3 entries across 3 versions & 1 rubygems

Version	Path
test_file_finder-0.1.4	lib/test_file_finder/mapping_strategies/pattern_matching.rb
test_file_finder-0.1.3	lib/test_file_finder/mapping_strategies/pattern_matching.rb
test_file_finder-0.1.1	lib/test_file_finder/mapping_strategies/pattern_matching.rb