1 files changed, 134 insertions, 0 deletions
diff --git a/spec/models/factories_spec.rb b/spec/models/factories_spec.rb
new file mode 100644
index 00000000000..45c3f93e6cf
--- /dev/null
+++ b/spec/models/factories_spec.rb
@@ -0,0 +1,134 @@
+# frozen_string_literal: true
+
+require 'spec_helper'
+
+RSpec.describe 'factories' do
+  include Database::DatabaseHelpers
+
+  # https://gitlab.com/groups/gitlab-org/-/epics/5464 tracks the remaining
+  # skipped traits.
+  #
+  # Consider adding a code comment if a trait cannot produce a valid object.
+  def skipped_traits
+    [
+      [:audit_event, :unauthenticated],
+      [:ci_build_trace_chunk, :fog_with_data],
+      [:ci_job_artifact, :remote_store],
+      [:ci_job_artifact, :raw],
+      [:ci_job_artifact, :gzip],
+      [:ci_job_artifact, :correct_checksum],
+      [:environment, :non_playable],
+      [:composer_cache_file, :object_storage],
+      [:debian_project_component_file, :object_storage],
+      [:debian_project_distribution, :object_storage],
+      [:debian_file_metadatum, :unknown],
+      [:issue_customer_relations_contact, :for_contact],
+      [:issue_customer_relations_contact, :for_issue],
+      [:package_file, :object_storage],
+      [:pages_domain, :without_certificate],
+      [:pages_domain, :without_key],
+      [:pages_domain, :with_missing_chain],
+      [:pages_domain, :with_trusted_chain],
+      [:pages_domain, :with_trusted_expired_chain],
+      [:pages_domain, :explicit_ecdsa],
+      [:project_member, :blocked],
+      [:remote_mirror, :ssh],
+      [:user_preference, :only_comments],
+      [:ci_pipeline_artifact, :remote_store]
+    ]
+  end
+
+  shared_examples 'factory' do |factory|
+    describe "#{factory.name} factory" do
+      it 'does not raise error when built' do
+        expect { build(factory.name) }.not_to raise_error
+      end
+
+      it 'does not raise error when created' do
+        expect { create(factory.name) }.not_to raise_error # rubocop:disable Rails/SaveBang
+      end
+
+      factory.definition.defined_traits.map(&:name).each do |trait_name|
+        describe "linting :#{trait_name} trait" do
+          it 'does not raise error when created' do
+            if skipped_traits.include?([factory.name, trait_name.to_sym])
+              pending("Trait skipped linting due to legacy error")
+            end
+
+            expect { create(factory.name, trait_name) }.not_to raise_error
+          end
+        end
+      end
+    end
+  end
+
+  # FactoryDefault speed up specs by creating associations only once
+  # and reuse them in other factories.
+  #
+  # However, for some factories we cannot use FactoryDefault because the
+  # associations must be unique and cannot be reused, or the factory default
+  # is being mutated.
+  skip_factory_defaults = %i[
+    ci_job_token_project_scope_link
+    evidence
+    exported_protected_branch
+    fork_network_member
+    group_member
+    import_state
+    issue_customer_relations_contact
+    member_task
+    milestone_release
+    namespace
+    project_broken_repo
+    project_namespace
+    project_repository
+    prometheus_alert
+    prometheus_alert_event
+    prometheus_metric
+    protected_branch
+    protected_branch_merge_access_level
+    protected_branch_push_access_level
+    protected_tag
+    release
+    release_link
+    self_managed_prometheus_alert_event
+    shard
+    users_star_project
+    wiki_page
+    wiki_page_meta
+  ].to_set.freeze
+
+  # Some factories and their corresponding models are based on
+  # database views. In order to use those, we have to swap the
+  # view out with a table of the same structure.
+  factories_based_on_view = %i[
+    postgres_index
+    postgres_index_bloat_estimate
+  ].to_set.freeze
+
+  without_fd, with_fd = FactoryBot.factories
+    .partition { |factory| skip_factory_defaults.include?(factory.name) }
+
+  context 'with factory defaults', factory_default: :keep do
+    let_it_be(:namespace) { create_default(:namespace).freeze }
+    let_it_be(:project) { create_default(:project, :repository).freeze }
+    let_it_be(:user) { create_default(:user).freeze }
+
+    before do
+      factories_based_on_view.each do |factory|
+        view = build(factory).class.table_name
+        swapout_view_for_table(view)
+      end
+    end
+
+    with_fd.each do |factory|
+      it_behaves_like 'factory', factory
+    end
+  end
+
+  context 'without factory defaults' do
+    without_fd.each do |factory|
+      it_behaves_like 'factory', factory
+    end
+  end
+end