class Covered::Statistics

def self.for(coverage)
	self.new.tap do |statistics|
		statistics << coverage
	end
end

def << coverage
	@count += 1
	
	@executable_count += coverage.executable_count
	@executed_count += coverage.executed_count
end

def as_json
	{
		count: count,
		executable_count: executable_count,
		executed_count: executed_count,
		percentage: percentage.to_f.round(2),
	}
end

def initialize
	@count = 0
	@executable_count = 0
	@executed_count = 0
end

def print(output)
	output.puts "* #{count} files checked; #{executed_count}/#{executable_count} lines executed; #{percentage.to_f.round(2)}% covered."
	
	# Could output funny message here, especially for 100% coverage.
end

def to_json(options)
	as_json.to_json(options)
end

def validate!(minimum = 1.0)
	if self.ratio < minimum
		raise CoverageError, "Coverage of #{self.percentage.to_f.round(2)}% is less than required minimum of #{(minimum * 100.0).round(2)}%!"
	end
end