Checks processor refactoring for more flexibility

app/services/check_domain_processor.rb

@@ -0,0 +1,25 @@
+class CheckDomainProcessor
+  include CheckProcessor
+  protected
+
+  def configuration_key
+    "checks_domain"
+  end
+
+  def resolvers
+    %i[
+      resolve_last_run_failed
+      resolve_expire_short_term
+      resolve_expire_long_term
+      resolve_unknown_expiry
+    ]
+  end
+
+  def scope
+    base_scope.domain
+  end
+
+  def process(check)
+    WhoisSyncJob.perform_now(check.id)
+  end
+end

app/services/check_processor.rb

@@ -1,17 +1,12 @@
-class CheckProcessor
+module CheckProcessor
   attr_reader :configuration
 
   def initialize(configuration = nil)
     @configuration = configuration || default_configuration
   end
 
-  def sync_dates # rubocop:disable Metrics/MethodLength
-    %i[
-      resolve_last_run_failed
-      resolve_expire_short_term
-      resolve_expire_long_term
-      resolve_unknown_expiry
-    ].each do |resolver|
+  def sync_dates
+    resolvers.each do |resolver|
       public_send(resolver).find_each(batch_size: 100).each do |check|
         process(check)
 
@@ -20,6 +15,12 @@ class CheckProcessor
     end
   end
 
+  # :nocov:
+  def resolvers
+    fail NotImplementedError, "#{self.class.name} did not implemented method #{__callee__}"
+  end
+  # :nocov:
+
   def resolve_last_run_failed
     scope.last_run_failed
   end
@@ -41,25 +42,32 @@ class CheckProcessor
     scope.where("domain_expires_at IS NULL")
   end
 
-  private
+  protected
 
-  def scope
+  def base_scope
     Check
       .active
       .where("last_run_at IS NULL OR last_run_at < DATE_SUB(NOW(), INTERVAL 12 HOUR)")
   end
 
-  def process(check)
-    case check.kind.to_sym
-    when :domain
-      WhoisSyncJob.perform_now(check.id)
-    else
-      fail ArgumentError, "Unsupported check kind `#{check.kind}`"
-    end
+  # :nocov:
+  def scope
+    fail NotImplementedError, "#{self.class.name} did not implemented method #{__callee__}"
   end
 
+  def process(check)
+    fail NotImplementedError, "#{self.class.name} did not implemented method #{__callee__}"
+  end
+
+  def configuration_key
+    fail NotImplementedError, "#{self.class.name} did not implemented method #{__callee__}"
+  end
+  # :nocov:
+
+  private
+
   def default_configuration
-    config = Rails.configuration.chexpire.fetch("checks", {})
+    config = Rails.configuration.chexpire.fetch(configuration_key, {})
 
     OpenStruct.new(
       interval: config.fetch("interval") { 0.00 },

config/chexpire.example.yml

@@ -3,7 +3,7 @@ default: &default
   notifier:
     interval: 0.00
     failure_days: 3
-  checks:
+  checks_domain:
     interval: 0.5
     long_term: 60
     long_term_frequency: 10

config/chexpire.test.yml

@@ -4,7 +4,7 @@ test:
   notifier:
     interval: 0.00
     failure_days: 3
-  checks:
+  checks_domain:
     interval: 0.00
     long_term: 60
     long_term_frequency: 10

config/schedule.rb

@@ -19,7 +19,7 @@ set :output, standard: "log/cron.log"
 # Learn more: http://github.com/javan/whenever
 
 every 1.day, at: '4:30 am', roles: [:app] do
-  rake "checks:sync_dates"
+  rake "checks:sync_dates:all"
 end
 
 every 1.day, at: '10:30 am', roles: [:app] do

lib/tasks/checks.rake

@@ -1,7 +1,11 @@
 namespace :checks do
-  desc "Refresh expiry dates for checks"
-  task sync_dates: :environment do
-    process = CheckProcessor.new
-    process.sync_dates
+  namespace :sync_dates do
+    task all: [:domain]
+
+    desc "Refresh domains expiry dates"
+    task domain: :environment do
+      process = CheckDomainProcessor.new
+      process.sync_dates
+    end
   end
 end

test/factories/checks.rb

@@ -44,6 +44,10 @@ FactoryBot.define do
       kind :domain
     end
 
+    trait :ssl do
+      kind :ssl
+    end
+
     trait :nil_dates do
       domain_created_at nil
       domain_updated_at nil

test/services/check_domain_processor_test.rb

@@ -0,0 +1,34 @@
+require "test_helper"
+
+class CheckDomainProcessorTest < ActiveSupport::TestCase
+  setup do
+    @processor = CheckDomainProcessor.new
+  end
+
+  test "process WhoisSyncJob for domain checks" do
+    domain = "domain.fr"
+    check = create(:check, :domain, :nil_dates, domain: domain)
+
+    mock_system_command("whois", domain, stdout: file_fixture("whois/domain.fr.txt").read) do
+      @processor.send(:process, check)
+    end
+
+    check.reload
+
+    assert_equal Time.new(2019, 2, 17, 0, 0, 0, 0), check.domain_expires_at
+  end
+
+  test "scope concerns only checks of kind 'domain'" do
+    domains = create_list(:check, 2, :domain)
+    create_list(:check, 2, :ssl)
+
+    assert_equal domains, @processor.send(:scope)
+  end
+
+  test "resolvers returns an array of methods returning a scope" do
+    assert_not_empty @processor.send(:resolvers)
+    @processor.send(:resolvers).each do |method|
+      assert_kind_of ActiveRecord::Relation, @processor.public_send(method)
+    end
+  end
+end

test/services/check_processor_test.rb

@@ -1,31 +1,26 @@
 require "test_helper"
 
+class CheckDummyProcessor
+  include CheckProcessor
+  def scope
+    base_scope
+  end
+
+  def configuration_key
+    "checks_dummy"
+  end
+
+  def resolvers
+    %i[
+      resolve_expire_short_term
+      resolve_expire_long_term
+    ]
+  end
+end
+
 class CheckProcessorTest < ActiveSupport::TestCase
   setup do
-    @processor = CheckProcessor.new
-  end
-
-  test "process WhoisSyncJob for domain checks" do
-    domain = "domain.fr"
-    check = create(:check, :domain, :nil_dates, domain: domain)
-
-    mock_system_command("whois", domain, stdout: file_fixture("whois/domain.fr.txt").read) do
-      @processor.send(:process, check)
-    end
-
-    check.reload
-
-    assert_equal Time.new(2019, 2, 17, 0, 0, 0, 0), check.domain_expires_at
-  end
-
-  test "raises an error for an unsupported check kind" do
-    check = build(:check)
-
-    check.stub :kind, :unknown do
-      assert_raises ArgumentError do
-        @processor.send(:process, check)
-      end
-    end
+    @processor = CheckDummyProcessor.new
   end
 
   test "resolve_last_run_failed includes already and never succeeded" do
@@ -113,7 +108,7 @@ class CheckProcessorTest < ActiveSupport::TestCase
       configuration.expect(:interval, 0.000001)
     end
 
-    processor = CheckProcessor.new(configuration)
+    processor = CheckDummyProcessor.new(configuration)
 
     mock = Minitest::Mock.new
     assert_stub = lambda { |actual_time|