Improve valid keys validation for CI config nodes

lib/ci/gitlab_ci_yaml_processor.rb

@@ -106,7 +106,6 @@ module Ci
       validate_job_types!(name, job)
 
       validate_job_stage!(name, job) if job[:stage]
-      validate_job_artifacts!(name, job) if job[:artifacts]
       validate_job_dependencies!(name, job) if job[:dependencies]
     end
 
@@ -142,14 +141,6 @@ module Ci
       end
     end
 
-    def validate_job_artifacts!(name, job)
-      job[:artifacts].keys.each do |key|
-        unless ALLOWED_ARTIFACTS_KEYS.include? key
-          raise ValidationError, "#{name} job: artifacts unknown parameter #{key}"
-        end
-      end
-    end
-
     def validate_job_dependencies!(name, job)
       unless validate_array_of_strings(job[:dependencies])
         raise ValidationError, "#{name} job: dependencies parameter should be an array of strings"

lib/gitlab/ci/config/node/artifacts.rb

@@ -13,6 +13,8 @@ module Gitlab
 
           validations do
             validates :config, type: Hash
+            validates :config,
+              allowed_keys: %i[name untracked paths when expire_in]
 
             with_options allow_nil: true do
               validates :name, type: String

lib/gitlab/ci/config/node/cache.rb

@@ -8,6 +8,10 @@ module Gitlab
         class Cache < Entry
           include Configurable
 
+          validations do
+            validates :config, allowed_keys: %i[key untracked paths]
+          end
+
           node :key, Node::Key,
             description: 'Cache key used to define a cache affinity.'
 
@@ -16,10 +20,6 @@ module Gitlab
 
           node :paths, Node::Paths,
             description: 'Specify which paths should be cached across builds.'
-
-          validations do
-            validates :config, allowed_keys: true
-          end
         end
       end
     end

lib/gitlab/ci/config/node/validator.rb

@@ -21,12 +21,6 @@ module Gitlab
             'Validator'
           end
 
-          def unknown_keys
-            return [] unless config.is_a?(Hash)
-
-            config.keys - @node.class.nodes.keys
-          end
-
           private
 
           def location
@@ -35,7 +29,7 @@ module Gitlab
           end
 
           def key_name
-            if key.blank? || key.nil?
+            if key.blank?
               @node.class.name.demodulize.underscore.humanize
             else
               key

lib/gitlab/ci/config/node/validators.rb

@@ -5,10 +5,11 @@ module Gitlab
         module Validators
           class AllowedKeysValidator < ActiveModel::EachValidator
             def validate_each(record, attribute, value)
-              if record.unknown_keys.any?
-                unknown_list = record.unknown_keys.join(', ')
-                record.errors.add(:config,
-                                  "contains unknown keys: #{unknown_list}")
+              unknown_keys = record.config.try(:keys).to_a - options[:in]
+
+              if unknown_keys.any?
+                record.errors.add(:config, 'contains unknown keys: ' +
+                                            unknown_keys.join(', '))
               end
             end
           end

spec/lib/gitlab/ci/config/node/artifacts_spec.rb

@@ -21,14 +21,25 @@ describe Gitlab::Ci::Config::Node::Artifacts do
     end
 
     context 'when entry value is not correct' do
+      describe '#errors' do
+        context 'when value of attribute is invalid' do
           let(:config) { { name: 10 } }
 
-      describe '#errors' do
-        it 'saves errors' do
+          it 'reports error' do
             expect(entry.errors)
               .to include 'artifacts name should be a string'
           end
         end
+
+        context 'when there is uknown key' do
+          let(:config) { { test: 100 } }
+
+          it 'reports error' do
+            expect(entry.errors)
+              .to include 'artifacts config contains unknown keys: test'
+          end
+        end
+      end
     end
   end
 end