vendor/plugins/rspec/lib/spec/runner/spec_parser.rb

   1 module Spec
   2   module Runner
   3     # Parses a spec file and finds the nearest example for a given line number.
   4     class SpecParser
   5       def spec_name_for(io, line_number)
   6         source  = io.read
   7         behaviour, behaviour_line = behaviour_at_line(source, line_number)
   8         example, example_line = example_at_line(source, line_number)
   9         if behaviour && example && (behaviour_line < example_line)
  10           "#{behaviour} #{example}"
  11         elsif behaviour
  12           behaviour
  13         else
  14           nil
  15         end
  16       end
  17
  18     protected
  19
  20       def behaviour_at_line(source, line_number)
  21         find_above(source, line_number, /^\s*(context|describe)\s+(.*)\s+do/)
  22       end
  23
  24       def example_at_line(source, line_number)
  25         find_above(source, line_number, /^\s*(specify|it)\s+(.*)\s+do/)
  26       end
  27
  28       # Returns the context/describe or specify/it name and the line number
  29       def find_above(source, line_number, pattern)
  30         lines_above_reversed(source, line_number).each_with_index do |line, n|
  31           return [parse_description($2), line_number-n] if line =~ pattern
  32         end
  33         nil
  34       end
  35
  36       def lines_above_reversed(source, line_number)
  37         lines = source.split("\n")
  38         lines[0...line_number].reverse
  39       end
  40
  41       def parse_description(str)
  42         return str[1..-2] if str =~ /^['"].*['"]$/
  43         if matches = /^(.*)\s*,\s*['"](.*)['"]$/.match(str)
  44           return ::Spec::DSL::Description.generate_description(matches[1], matches[2])
  45         end
  46         return str
  47       end
  48     end
  49   end
  50 end