Merge branch 'fix/ci-first-job-allow-failure' into 'master'

Fix CI builds scheduler when first build in stage is allowed to fail

This fixes an edge case in CI builds scheduler when first build in stage was marked as allowed to fail.

Closes #3192

See merge request !2869

CHANGELOG

@@ -63,6 +63,7 @@ v 8.5.0 (unreleased)
   - Fix CI builds badge, add a new link to builds badge, deprecate the old one
   - Fix broken link to project in build notification emails
   - Ability to see and sort on vote count from Issues and MR lists
+  - Fix builds scheduler when first build in stage was allowed to fail
 
 v 8.4.4
   - Update omniauth-saml gem to 1.4.2

app/services/ci/create_builds_service.rb

@@ -34,6 +34,7 @@ module Ci
 
           build = commit.builds.create!(build_attrs)
           build.execute_hooks
+          build
         end
       end
     end

lib/ci/status.rb

@@ -1,11 +1,9 @@
 module Ci
   class Status
     def self.get_status(statuses)
-      statuses.reject! { |status| status.try(&:allow_failure?) }
-
       if statuses.none?
         'skipped'
-      elsif statuses.all?(&:success?)
+      elsif statuses.all? { |status| status.success? || status.ignored? }
         'success'
       elsif statuses.all?(&:pending?)
         'pending'

spec/factories/ci/builds.rb

@@ -16,10 +16,30 @@ FactoryGirl.define do
 
     commit factory: :ci_commit
 
+    trait :success do
+      status 'success'
+    end
+
+    trait :failed do
+      status 'failed'
+    end
+
     trait :canceled do
       status 'canceled'
     end
 
+    trait :running do
+      status 'running'
+    end
+
+    trait :pending do
+      status 'pending'
+    end
+
+    trait :allowed_to_fail do
+      allow_failure true
+    end
+
     after(:build) do |build, evaluator|
       build.project = build.commit.project
     end

spec/lib/ci/status_spec.rb

@@ -0,0 +1,37 @@
+require 'spec_helper'
+
+describe Ci::Status do
+  describe '.get_status' do
+    subject { described_class.get_status(builds) }
+
+    context 'all builds successful' do
+      let(:builds) { Array.new(2) { create(:ci_build, :success) } }
+      it { is_expected.to eq 'success' }
+    end
+
+    context 'at least one build failed' do
+      let(:builds) { [create(:ci_build, :success), create(:ci_build, :failed)] }
+      it { is_expected.to eq 'failed' }
+    end
+
+    context 'at least one running' do
+      let(:builds) { [create(:ci_build, :success), create(:ci_build, :running)] }
+      it { is_expected.to eq 'running' }
+    end
+
+    context 'at least one pending' do
+      let(:builds) { [create(:ci_build, :success), create(:ci_build, :pending)] }
+      it { is_expected.to eq 'running' }
+    end
+
+    context 'build success and failed but allowed to fail' do
+      let(:builds) { [create(:ci_build, :success), create(:ci_build, :failed, :allowed_to_fail)] }
+      it { is_expected.to eq 'success' }
+    end
+
+    context 'one build failed but allowed to fail' do
+      let(:builds) { [create(:ci_build, :failed, :allowed_to_fail)] }
+      it { is_expected.to eq 'success' }
+    end
+  end
+end

spec/models/ci/commit_spec.rb

@@ -247,6 +247,35 @@ describe Ci::Commit, models: true do
       end
     end
 
+
+    context 'custom stage with first job allowed to fail' do
+      let(:yaml) do
+        {
+          stages: ['clean', 'test'],
+          clean_job: {
+            stage: 'clean',
+            allow_failure: true,
+            script: 'BUILD',
+          },
+          test_job: {
+            stage: 'test',
+            script: 'TEST',
+          },
+        }
+      end
+
+      before do
+        stub_ci_commit_yaml_file(YAML.dump(yaml))
+        create_builds
+      end
+
+      it 'properly schedules builds' do
+        expect(commit.builds.pluck(:status)).to contain_exactly('pending')
+        commit.builds.running_or_pending.each(&:drop)
+        expect(commit.builds.pluck(:status)).to contain_exactly('pending', 'failed')
+      end
+    end
+
     context 'properly creates builds when "when" is defined' do
       let(:yaml) do
         {

spec/services/ci/create_builds_service_spec.rb

@@ -0,0 +1,28 @@
+require 'spec_helper'
+
+describe Ci::CreateBuildsService, services: true do
+  let(:commit) { create(:ci_commit) }
+  let(:user) { create(:user) }
+
+  describe '#execute' do
+    # Using stubbed .gitlab-ci.yml created in commit factory
+    #
+
+    subject do
+      described_class.new.execute(commit, 'test', 'master', nil, user, nil, status)
+    end
+
+    context 'next builds available' do
+      let(:status) { 'success' }
+
+      it { is_expected.to be_an_instance_of Array }
+      it { is_expected.to all(be_an_instance_of Ci::Build) }
+    end
+
+    context 'builds skipped' do
+      let(:status) { 'skipped' }
+
+      it { is_expected.to be_empty }
+    end
+  end
+end