Module: Coverage

Defined in:
lib/tracepoint/coverage.rb

Overview

This is backport of Ruby 1.9’s Coverage library that can be used with Ruby 1.8 or older. It is not a 100% perfect drop-in, but in comes close.

This biggest issue with it at this point is that it cannot exclude coverage of irrelevant files b/c $LOADED_FEATURES in Ruby 1.8 does not use absolute paths. Not sure how to work around this yet.

Class Method Summary collapse

Class Method Details

.reset ⇒ Object 



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# File 'lib/tracepoint/coverage.rb', line 40

def self.reset
  @ignore = $LOADED_FEATURES.dup
  @result = Hash.new{ |h,k| h[k]=[] }
end

.result ⇒ Object 



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# File 'lib/tracepoint/coverage.rb', line 35

def self.result
  @result
end

.start ⇒ Object 



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# File 'lib/tracepoint/coverage.rb', line 14

def self.start
  reset

  ignore = @ignore
  result = @result

  TracePoint.trace do |tp|
    case tp.event
    when 'line', 'class', 'end'
      unless ignore.include?(tp.file)
        file = File.expand_path(tp.file)
        result[file][tp.line-1] ||= 0
        result[file][tp.line-1] += 1
      end
    end
  end

  TracePoint.activate
end

.stop ⇒ Object 



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# File 'lib/tracepoint/coverage.rb', line 46

def self.stop
  TracePoint.deactivate
end