Faker::Company.name uniqueness

faker_uniq_demo.rb

# Demonstration of why you should use Faker's .unique option when using
#   Faker on attributes with uniqueness constraints

def first_collision_lazy
  names={}
  1_000.times do |a|
    name = Faker::Company.name 
    return names.count if names[name]
    names[name]=true
  end
  nil
end

def first_collision_uniq
  names={}
  1_000.times do |a|
    name = Faker::Company.unique.name 
    return names.count if names[name]
    names[name]=true
  end
  nil
end

def analyze(methodname)
  results = 100.times.map{ send(methodname) }.compact
  return "No duplicates over 100 runs" if results.empty?
  "#{results.count} runs (out of 100) had duplicates, "\
    "average first collision was on generated "\
    "name ##{results.sum / results.count}"
end

analyze :first_collision_lazy
# => "100 runs (out of 100) had duplicates, average first collision was on generated name #164"
analyze :first_collision_uniq
# => No duplicates over 100 runs