Make cancelled pipelines being able to retry

app/models/ci/pipeline.rb

@@ -152,7 +152,7 @@ module Ci
 
     def retryable?
       builds.latest.any? do |build|
-        build.failed? && build.retryable?
+        (build.failed? || build.canceled?) && build.retryable?
       end
     end
 

spec/models/ci/pipeline_spec.rb

@@ -88,24 +88,38 @@ describe Ci::Pipeline, models: true do
 
     context 'no failed builds' do
       before do
-        FactoryGirl.create :ci_build, name: "rspec", pipeline: pipeline, status: 'success'
+        create_build('rspec', 'success')
       end
 
-      it 'be not retryable' do
+      it 'is not retryable' do
         is_expected.to be_falsey
       end
+
+      context 'one canceled job' do
+        before do
+          create_build('rubocop', 'canceled')
+        end
+
+        it 'is retryable' do
+          is_expected.to be_truthy
+        end
+      end
     end
 
     context 'with failed builds' do
       before do
-        FactoryGirl.create :ci_build, name: "rspec", pipeline: pipeline, status: 'running'
-        FactoryGirl.create :ci_build, name: "rubocop", pipeline: pipeline, status: 'failed'
+        create_build('rspec', 'running')
+        create_build('rubocop', 'failed')
       end
 
-      it 'be retryable' do
+      it 'is retryable' do
         is_expected.to be_truthy
       end
     end
+
+    def create_build(name, status)
+      create(:ci_build, name: name, status: status, pipeline: pipeline)
+    end
   end
 
   describe '#stages' do