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Module: SimpleCov::Combine::BranchesCombiner

Relationships & Source Files
Defined in: lib/simplecov/combine/branches_combiner.rb

Overview

::SimpleCov::Combine different branch coverage results on single file.

Should be called through SimpleCov.combine.

Class Method Summary

Class Method Details

.combine(coverage_a, coverage_b) ⇒ Hash (mod_func)

Return merged branches or the existed branch if other is missing.

Branches inside files are always same if they exist, the difference only in coverage count. Branch coverage report for any conditional case is built from hash, it's key is a condition and it's body is a hash << keys from condition and value is coverage rate >>. ex: branches => { [:if, 3, 8, 6, 8, 36] => 4, 8, 6, 8, 12] => 1, [:else, 5, 8, 6, 8, 36] => 2, ... } We create copy of result and update it values depending on the combined branches coverage values.

[ GitHub ] 

  


# File 'lib/simplecov/combine/branches_combiner.rb', line 27



def combine(coverage_a, coverage_b)
  merged = {} #: Hash[untyped, [untyped, Hash[untyped, untyped]]]
  [coverage_a, coverage_b].each do |coverage|
    coverage.each do |condition, branches_inside|
      entry = merged[identities[condition]] ||= [condition, {}]
      merge_branches(entry[1], branches_inside)
    end
  end

  merged.values.to_h { |condition, branches| [condition, branches.values.to_h] }
end


  








  

    .identities   (mod_func)
  



  

    
Bounded by the project's branch count, like RubyDataParser's parse
cache.

  



  [ GitHub ]


  

  


# File 'lib/simplecov/combine/branches_combiner.rb', line 55



def identities
  @identities ||= IdentityInterner.build { |tuple| tuple_identity(tuple) }
end


  








  

    .merge_branches(target, source)   (mod_func)
  



  

    
target and its pairs are always built by .combine above, so updating
them in place can't reach data a caller still holds.

  



  [ GitHub ]


  

  


# File 'lib/simplecov/combine/branches_combiner.rb', line 41



def merge_branches(target, source)
  source.each do |branch, count|
    branch_key = identities[branch]
    existing = target[branch_key]
    if existing
      existing[1] += count
    else
      target[branch_key] = [branch, count]
    end
  end
end


  








  

    .tuple_identity(tuple)   (mod_func)
  



  

    
Branches match on source span, whatever ids the recording processes
handed them (issue #1233).

  



  [ GitHub ]


  

  


# File 'lib/simplecov/combine/branches_combiner.rb', line 61



def tuple_identity(tuple)
  type, _id, start_line, start_column, end_line, end_column = SourceFile::RubyDataParser.call(tuple)
  [type, start_line, start_column, end_line, end_column].freeze
end