Created
March 28, 2017 21:49
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AnyFixture: make DB fixtures from blocks
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module AnyFixture | |
INSERT_RXP = /^INSERT INTO ([\S]+)/ | |
class Cache | |
attr_reader :store | |
delegate :clear, to: :store | |
def initialize | |
@store = {} | |
end | |
def fetch(key) | |
return store[key] if store.key?(key) | |
return unless block_given? | |
store[key] = yield | |
end | |
end | |
class << self | |
def add(id) | |
cache.fetch(id) do | |
ActiveSupport::Notifications.subscribed(method(:subscriber), "sql.active_record") do | |
yield | |
end | |
end | |
end | |
def subscriber(_event, _start, _finish, _id, data) | |
matches = data.fetch(:sql).match(INSERT_RXP) | |
tables_cache[matches[1]] = true if matches | |
end | |
def clean | |
tables_cache.keys.each do |table| | |
ActiveRecord::Base.connection.execute %( | |
DELETE FROM #{table} | |
) | |
end | |
tables_cache.clear | |
cache.clear | |
end | |
private | |
def cache | |
@cache ||= Cache.new | |
end | |
def tables_cache | |
@tables_cache ||= {} | |
end | |
end | |
end | |
RSpec.configure do |config| | |
after(:suite) { AnyFixture.clean } | |
end |
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