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Contents
module RSpec
module Core
module Formatters
# This class extracts code snippets by looking at the backtrace of the passed error
class SnippetExtractor #:nodoc:
class NullConverter; def convert(code, pre); code; end; end #:nodoc:
begin; require 'syntax/convertors/html'; @@converter = Syntax::Convertors::HTML.for_syntax "ruby"; rescue LoadError => e; @@converter = NullConverter.new; end
def snippet(error)
raw_code, line = snippet_for(error.backtrace[0])
highlighted = @@converter.convert(raw_code, false)
highlighted << "\n<span class=\"comment\"># gem install syntax to get syntax highlighting</span>" if @@converter.is_a?(NullConverter)
post_process(highlighted, line)
end
def snippet_for(error_line)
if error_line =~ /(.*):(\d+)/
file = $1
line = $2.to_i
[lines_around(file, line), line]
else
["# Couldn't get snippet for #{error_line}", 1]
end
end
def lines_around(file, line)
if File.file?(file)
lines = File.read(file).split("\n")
min = [0, line-3].max
max = [line+1, lines.length-1].min
selected_lines = []
selected_lines.join("\n")
lines[min..max].join("\n")
else
"# Couldn't get snippet for #{file}"
end
end
def post_process(highlighted, offending_line)
new_lines = []
highlighted.split("\n").each_with_index do |line, i|
new_line = "<span class=\"linenum\">#{offending_line+i-2}</span>#{line}"
new_line = "<span class=\"offending\">#{new_line}</span>" if i == 2
new_lines << new_line
end
new_lines.join("\n")
end
end
end
end
end
Version data entries
13 entries across 13 versions & 2 rubygems