Class: ParallelTests::Grouper

Inherits:
Object
  • Object
show all
Defined in:
lib/parallel_tests/grouper.rb

Class Method Summary collapse

Class Method Details

.in_even_groups_by_size(items_with_sizes, num_groups) ⇒ Object 



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# File 'lib/parallel_tests/grouper.rb', line 14

def self.in_even_groups_by_size(items_with_sizes, num_groups)
  items_with_size = smallest_first(items_with_sizes)
  groups = Array.new(num_groups){{:items => [], :size => 0}}
  items_with_size.each do |item, size|
    # always add to smallest group
    smallest = groups.sort_by{|g| g[:size] }.first
    smallest[:items] << item
    smallest[:size] += size
  end

  groups.map{|g| g[:items] }
end

.in_groups(items, num_groups) ⇒ Object 



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# File 'lib/parallel_tests/grouper.rb', line 3

def self.in_groups(items, num_groups)
  [].tap do |groups|
    while ! items.empty?
      (0...num_groups).map do |group_number|
        groups[group_number] ||= []
        groups[group_number] << items.shift
      end
    end
  end
end

.smallest_first(files) ⇒ Object 



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# File 'lib/parallel_tests/grouper.rb', line 27

def self.smallest_first(files)
  files.sort_by{|item, size| size }.reverse
end