How to use lint method of FactoryBot Package

Best Factory_bot_ruby code snippet using FactoryBot.lint

factory_bot.rb

Source:factory_bot.rb

...41require 'factory_bot/decorator/class_key_hash'42require 'factory_bot/decorator/disallows_duplicates_registry'43require 'factory_bot/decorator/invocation_tracker'44require 'factory_bot/decorator/new_constructor'45require 'factory_bot/linter'46require 'factory_bot/version'47module FactoryBot48  def self.configuration49    @configuration ||= Configuration.new50  end51  def self.reset_configuration52    @configuration = nil53  end54  # Look for errors in factories and (optionally) their traits.55  # Parameters:56  # factories - which factories to lint; omit for all factories57  # options:58  #   traits: true - to lint traits as well as factories59  #   strategy: :create - to specify the strategy for linting60  def self.lint(*args)61    options = args.extract_options!62    factories_to_lint = args[0] || FactoryBot.factories63    linting_strategy = options[:traits] ? :factory_and_traits : :factory64    factory_strategy = options[:strategy] || :create65    Linter.new(factories_to_lint, linting_strategy, factory_strategy).lint!66  end67  class << self68    delegate :factories,69             :sequences,70             :traits,71             :callbacks,72             :strategies,73             :callback_names,74             :to_create,75             :skip_create,76             :initialize_with,77             :constructor,78             :duplicate_attribute_assignment_from_initialize_with,79             :duplicate_attribute_assignment_from_initialize_with=,...

lint_spec.rb

Source:lint_spec.rb

1describe "FactoryBot.lint" do2  it "raises when a factory is invalid" do3    define_model "User", name: :string do4      validates :name, presence: true5    end6    define_model "AlwaysValid"7    FactoryBot.define do8      factory :user do9        factory :admin_user10      end11      factory :always_valid12    end13    error_message = <<~ERROR_MESSAGE.strip14      The following factories are invalid:15      * user - Validation failed: Name can't be blank (ActiveRecord::RecordInvalid)16      * admin_user - Validation failed: Name can't be blank (ActiveRecord::RecordInvalid)17    ERROR_MESSAGE18    expect {19      FactoryBot.lint20    }.to raise_error FactoryBot::InvalidFactoryError, error_message21  end22  it "does not raise when all factories are valid" do23    define_model "User", name: :string do24      validates :name, presence: true25    end26    FactoryBot.define do27      factory :user do28        name { "assigned" }29      end30    end31    expect { FactoryBot.lint }.not_to raise_error32  end33  it "allows for selective linting" do34    define_model "InvalidThing", name: :string do35      validates :name, presence: true36    end37    define_model "ValidThing", name: :string38    FactoryBot.define do39      factory :valid_thing40      factory :invalid_thing41    end42    expect {43      only_valid_factories = FactoryBot.factories.reject { |factory|44        factory.name =~ /invalid/45      }46      FactoryBot.lint only_valid_factories47    }.not_to raise_error48  end49  describe "trait validation" do50    context "enabled" do51      it "raises if a trait produces an invalid object" do52        define_model "User", name: :string do53          validates :name, presence: true54        end55        FactoryBot.define do56          factory :user do57            name { "Yep" }58            trait :unnamed do59              name { nil }60            end61          end62        end63        error_message = <<~ERROR_MESSAGE.strip64          The following factories are invalid:65          * user+unnamed - Validation failed: Name can't be blank (ActiveRecord::RecordInvalid)66        ERROR_MESSAGE67        expect {68          FactoryBot.lint traits: true69        }.to raise_error FactoryBot::InvalidFactoryError, error_message70      end71      it "does not raise if a trait produces a valid object" do72        define_model "User", name: :string do73          validates :name, presence: true74        end75        FactoryBot.define do76          factory :user do77            name { "Yep" }78            trait :renamed do79              name { "Yessir" }80            end81          end82        end83        expect {84          FactoryBot.lint traits: true85        }.not_to raise_error86      end87    end88    context "disabled" do89      it "does not raises if a trait produces an invalid object" do90        define_model "User", name: :string do91          validates :name, presence: true92        end93        FactoryBot.define do94          factory :user do95            name { "Yep" }96            trait :unnamed do97              name { nil }98            end99          end100        end101        expect {102          FactoryBot.lint traits: false103          FactoryBot.lint104        }.not_to raise_error105      end106    end107  end108  describe "factory strategy for linting" do109    it "uses the requested strategy" do110      define_class "User" do111        attr_accessor :name112        def save!113          raise "expected :build strategy, #save! shouldn't be invoked"114        end115      end116      FactoryBot.define do117        factory :user do118          name { "Barbara" }119        end120      end121      expect {122        FactoryBot.lint strategy: :build123      }.not_to raise_error124    end125    it "uses the requested strategy during trait validation" do126      define_class "User" do127        attr_accessor :name128        def save!129          raise "expected :build strategy, #save! shouldn't be invoked"130        end131      end132      FactoryBot.define do133        factory :user do134          name { "Barbara" }135          trait :male do136            name { "Bob" }137          end138        end139      end140      expect {141        FactoryBot.lint traits: true, strategy: :build142      }.not_to raise_error143    end144  end145  describe "verbose linting" do146    it "prints the backtrace for each factory error" do147      define_class("InvalidThing") do148        def save!149          raise "invalid"150        end151      end152      FactoryBot.define do153        factory :invalid_thing154      end155      expect {156        FactoryBot.lint(verbose: true)157      }.to raise_error(158        FactoryBot::InvalidFactoryError,159        %r{#{__FILE__}:\d*:in `save!'}160      )161    end162  end163end...

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