a552645e7f
While we already had "one test to rule all stats", testing each method individually makes reading, adding and changing tests easier. Note we need to make all methods being tested public. We could also test them using methods like `stats.generate[:total_valid_votes]` instead of `stats.total_valid_votes`, but then the tests would be more difficult to read.
111 lines
2.6 KiB
Ruby
111 lines
2.6 KiB
Ruby
module Statisticable
|
|
extend ActiveSupport::Concern
|
|
|
|
included do
|
|
attr_reader :resource
|
|
|
|
def initialize(resource)
|
|
@resource = resource
|
|
end
|
|
|
|
def generate
|
|
self.class.stats_methods.map { |stat_name| [stat_name, send(stat_name)] }.to_h
|
|
end
|
|
|
|
def total_male_participants
|
|
participants.where(gender: "male").count
|
|
end
|
|
|
|
def total_female_participants
|
|
participants.where(gender: "female").count
|
|
end
|
|
|
|
def total_unknown_gender_or_age
|
|
participants.where("gender IS NULL OR date_of_birth is NULL").uniq.count
|
|
end
|
|
|
|
def male_percentage
|
|
calculate_percentage(total_male_participants, total_participants_with_gender)
|
|
end
|
|
|
|
def female_percentage
|
|
calculate_percentage(total_female_participants, total_participants_with_gender)
|
|
end
|
|
|
|
def participants_by_age
|
|
age_groups.map do |start, finish|
|
|
users = participants.where("date_of_birth > ? AND date_of_birth < ?",
|
|
finish.years.ago.beginning_of_year,
|
|
start.years.ago.end_of_year)
|
|
|
|
[
|
|
"#{start} - #{finish}",
|
|
{
|
|
range: range_description(start, finish),
|
|
count: users.count,
|
|
percentage: calculate_percentage(users.count, total_participants)
|
|
}
|
|
]
|
|
end.to_h
|
|
end
|
|
|
|
private
|
|
|
|
def total_participants_with_gender
|
|
participants.where.not(gender: nil).distinct.count
|
|
end
|
|
|
|
def age_groups
|
|
[[16, 19],
|
|
[20, 24],
|
|
[25, 29],
|
|
[30, 34],
|
|
[35, 39],
|
|
[40, 44],
|
|
[45, 49],
|
|
[50, 54],
|
|
[55, 59],
|
|
[60, 64],
|
|
[65, 69],
|
|
[70, 74],
|
|
[75, 79],
|
|
[80, 84],
|
|
[85, 89],
|
|
[90, 300]
|
|
]
|
|
end
|
|
|
|
def calculate_percentage(fraction, total)
|
|
return 0.0 if total.zero?
|
|
|
|
(fraction * 100.0 / total).round(3)
|
|
end
|
|
|
|
def range_description(start, finish)
|
|
if finish > 200
|
|
I18n.t("stats.age_more_than", start: start)
|
|
else
|
|
I18n.t("stats.age_range", start: start, finish: finish)
|
|
end
|
|
end
|
|
end
|
|
|
|
class_methods do
|
|
def stats_methods
|
|
%i[total_participants total_male_participants
|
|
total_female_participants total_unknown_gender_or_age
|
|
male_percentage female_percentage participants_by_age]
|
|
end
|
|
|
|
def stats_cache(*method_names)
|
|
method_names.each do |method_name|
|
|
alias_method :"raw_#{method_name}", method_name
|
|
|
|
define_method method_name do
|
|
stats_cache(method_name) { send(:"raw_#{method_name}") }
|
|
end
|
|
end
|
|
end
|
|
end
|
|
end
|