complex flock operation size.rb

require 'flockdb'

flock = Flock.new "localhost:7915", :graphs => { :a_to_b => 1, :b_to_c => 2 }
flock.add(1, :a_to_b, 1)
flock.add(1, :a_to_b, 2)
flock.add(1, :a_to_b, 3)

flock.add(2, :b_to_c, 1)
flock.add(2, :b_to_c, 2)

# OK
flock.select(1, :a_to_b, nil).size == flock.select(1, :a_to_b, nil).to_a.size

# Not OK, .size is 0 but to_a.size is 1
flock.select(1, :a_to_b, nil).intersect(nil, :b_to_c, 2).size == flock.select(1, :a_to_b, nil).intersect(nil, :b_to_c, 2).to_a.size