lib/metric_fu/metrics/rcov/rcov.rb
require 'enumerator'
module MetricFu
class Rcov < Generator
NEW_FILE_MARKER = /^={80}$/.freeze
class Line
attr_accessor :content, :was_run
def initialize(content, was_run)
@content = content
@was_run = was_run
end
def to_h
{:content => @content, :was_run => @was_run}
end
end
def emit
if run_rcov?
mf_debug "** Running the specs/tests in the [#{MetricFu.rcov[:environment]}] environment"
mf_debug "** #{command}"
`#{command}`
end
end
def command
@command ||= default_command
end
def command=(command)
@command = command
end
def default_command
FileUtils.rm_rf(MetricFu::Rcov.metric_directory, :verbose => false)
Dir.mkdir(MetricFu::Rcov.metric_directory)
output = ">> #{MetricFu::Rcov.metric_directory}/rcov.txt"
test_files = FileList[*MetricFu.rcov[:test_files]].join(' ')
rcov_opts = MetricFu.rcov[:rcov_opts].join(' ')
%Q(RAILS_ENV=#{MetricFu.rcov[:environment]} rcov #{test_files} #{rcov_opts} #{output})
end
def analyze
output_file = MetricFu.rcov[:external] ? MetricFu.rcov[:external] : MetricFu::Rcov.metric_directory + '/rcov.txt'
output = File.open(output_file).read
output = output.split(NEW_FILE_MARKER)
output.shift # Throw away the first entry - it's the execution time etc.
files = assemble_files(output)
@global_total_lines = 0
@global_total_lines_run = 0
@rcov = add_coverage_percentage(files)
end
def to_h
global_percent_run = ((@global_total_lines_run.to_f / @global_total_lines.to_f) * 100)
add_method_data
{:rcov => @rcov.merge({:global_percent_run => round_to_tenths(global_percent_run) })}
end
private
def add_method_data
@rcov.each_pair do |file_path, info|
file_contents = ""
coverage = []
info[:lines].each_with_index do |line, index|
file_contents << "#{line[:content]}\n"
coverage << line[:was_run]
end
begin
line_numbers = MetricFu::LineNumbers.new(file_contents)
rescue StandardError => e
raise e unless e.message =~ /you shouldn't be able to get here/
STDOUT.puts "ruby_parser blew up while trying to parse #{file_path}. You won't have method level Rcov information for this file."
next
end
method_coverage_map = {}
coverage.each_with_index do |covered, index|
line_number = index + 1
if line_numbers.in_method?(line_number)
method_name = line_numbers.method_at_line(line_number)
method_coverage_map[method_name] ||= {}
method_coverage_map[method_name][:total] ||= 0
method_coverage_map[method_name][:total] += 1
method_coverage_map[method_name][:uncovered] ||= 0
method_coverage_map[method_name][:uncovered] += 1 if !covered
end
end
@rcov[file_path][:methods] = {}
method_coverage_map.each do |method_name, coverage_data|
@rcov[file_path][:methods][method_name] = (coverage_data[:uncovered] / coverage_data[:total].to_f) * 100.0
end
end
end
def assemble_files(output)
files = {}
output.each_slice(2) {|out| files[out.first.strip] = out.last}
files.each_pair {|fname, content| files[fname] = content.split("\n") }
files.each_pair do |fname, content|
content.map! do |raw_line|
line = Line.new(raw_line[3..-1], !raw_line.match(/^!!/)).to_h
end
content.reject! {|line| line[:content].blank? }
files[fname] = {:lines => content}
end
files
end
def add_coverage_percentage(files)
files.each_pair do |fname, content|
lines = content[:lines]
@global_total_lines_run += lines_run = lines.find_all {|line| line[:was_run] == true }.length
@global_total_lines += total_lines = lines.length
percent_run = ((lines_run.to_f / total_lines.to_f) * 100).round
files[fname][:percent_run] = percent_run
end
end
def run_rcov?
!(MetricFu.rcov[:external])
end
end
end