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Move authorize to resolver
and fix a few problems.

app/graphql/resolvers/project_jobs_resolver.rb

@@ -2,16 +2,19 @@
 
 module Resolvers
   class ProjectJobsResolver < BaseResolver
+    include Gitlab::Graphql::Authorize::AuthorizeResource
     include LooksAhead
 
     type ::Types::Ci::JobType.connection_type, null: true
-
-    alias_method :project, :object
+    authorize :read_build
+    authorizes_object!
 
     argument :statuses, [::Types::Ci::JobStatusEnum],
               required: false,
               description: 'Filter jobs by status.'
 
+    alias_method :project, :object
+
     def ready?(**args)
       context[self.class] ||= { executions: 0 }
       context[self.class][:executions] += 1
@@ -29,10 +32,10 @@ module Resolvers
     private
 
     def preloads
-      [
-        { artifacts: :job_artifacts },
-        { pipeline: :user }
-      ]
+      {
+        artifacts: [:job_artifacts],
+        pipeline: [:user]
+      }
     end
   end
 end

app/graphql/types/project_type.rb

@@ -186,10 +186,8 @@ module Types
     field :jobs,
          Types::Ci::JobType.connection_type,
          null: true,
-         description: 'Jobs of a project, only jobs of a single project can be requested at a time.',
-         extras: [:lookahead],
-         resolver: Resolvers::ProjectJobsResolver,
-         authorize: :read_build
+         description: 'Jobs of a single project.',
+         resolver: Resolvers::ProjectJobsResolver
 
     field :pipelines,
           null: true,

spec/graphql/resolvers/project_jobs_resolver_spec.rb

@@ -21,7 +21,7 @@ RSpec.describe Resolvers::ProjectJobsResolver do
 
   describe '#resolve' do
     context 'with statuses argument' do
-      let(:args) { { statuses: [Types::Ci::JobStatusEnum.values['SUCCESS'].value] } }
+      let(:args) { { statuses: [Types::Ci::JobStatusEnum.coerce_isolated_input('SUCCESS')] } }
 
       it { is_expected.to contain_exactly(build_one, build_two) }
     end