Sha256: 62cfa2e9bf5b773dcb42a4d4259caabaf60793f7ba9d4e03849ea84c7f420a2e
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Versions: 54
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Stored size: 1.17 KB
Contents
require 'digest'
class TestTrack::VariantCalculator
include TestTrack::RequiredOptions
attr_reader :visitor, :split_name
delegate :split_registry, to: :visitor
def initialize(opts = {})
@visitor = require_option!(opts, :visitor)
@split_name = require_option!(opts, :split_name)
raise "unknown opts: #{opts.keys.to_sentence}" if opts.present?
end
def variant
return nil unless split_registry
@variant ||= _variant || raise("Assignment bucket out of range. #{assignment_bucket} unmatched in #{split_name}: #{weighting}")
end
def _variant
bucket_ceiling = 0
sorted_variants.detect do |variant|
bucket_ceiling += weighting[variant]
bucket_ceiling > assignment_bucket
end
end
def sorted_variants
weighting.keys.sort
end
def weighting
@weighting ||= split_registry[split_name] || raise("TestTrack split '#{split_name}' not found. Need to write/run a migration?")
end
def assignment_bucket
@assignment_bucket ||= hash_fixnum % 100
end
def hash_fixnum
split_visitor_hash.slice(0, 8).to_i(16)
end
def split_visitor_hash
Digest::MD5.new.update(split_name.to_s + visitor.id.to_s).hexdigest
end
end
Version data entries
54 entries across 54 versions & 1 rubygems