Add tests to cover all introduced changes

app/models/project.rb

@@ -1390,7 +1390,7 @@ class Project < ActiveRecord::Base
   end
 
   def has_ci?
-    @repository.gitlab_ci_yml || @project.auto_devops_enabled?
+    repository.gitlab_ci_yml || auto_devops_enabled?
   end
 
   def predefined_variables

app/models/project_auto_devops.rb

 class ProjectAutoDevops < ActiveRecord::Base
   belongs_to :project
 
-  validates :domain, presence: true, hostname: { allow_numeric_hostname: true }, if: :enabled?
+  validates :domain, allow_blank: true, hostname: { allow_numeric_hostname: true }
 
   def variables
     variables = []

app/services/ci/create_pipeline_service.rb

@@ -72,7 +72,6 @@ module Ci
         unless pipeline.ci_yaml_file
           return error("Missing #{pipeline.ci_yaml_file_path} file")
         end
-
         return error(pipeline.yaml_errors, save: save_on_errors)
       end
 

spec/factories/project_auto_devops.rb

@@ -2,5 +2,6 @@ FactoryGirl.define do
   factory :project_auto_devops do
     project
     enabled true
+    domain "example.com"
   end
 end

spec/models/ci/build_spec.rb

@@ -1688,6 +1688,30 @@ describe Ci::Build do
            { key: 'secret', value: 'value', public: false }])
       end
     end
+
+    context 'when using auto devops' do
+      context 'and is enabled' do
+        before do
+          project.create_auto_devops!(enabled: true, domain: 'example.com')
+        end
+
+        it "includes AUTO_DEVOPS_DOMAIN" do
+          is_expected.to include(
+            { key: 'AUTO_DEVOPS_DOMAIN', value: 'example.com', public: true })
+        end
+      end
+
+      context 'and is disabled' do
+        before do
+          project.create_auto_devops!(enabled: false, domain: 'example.com')
+        end
+
+        it "includes AUTO_DEVOPS_DOMAIN" do
+          is_expected.not_to include(
+            { key: 'AUTO_DEVOPS_DOMAIN', value: 'example.com', public: true })
+        end
+      end
+    end
   end
 
   describe 'state transition: any => [:pending]' do

spec/models/ci/pipeline_spec.rb

@@ -799,31 +799,64 @@ describe Ci::Pipeline, :mailer do
     end
   end
 
-  describe '#detect_ci_yaml_file' do
-    context 'when the repo has a config file' do
-      it 'returns that configuration' do
-        allow(pipeline.project.repository).to receive(:gitlab_ci_yml_for)
+  describe '#set_config_source' do
+    context 'on object initialisation' do
+      context 'when pipelines does not contain needed data' do
+        let(:pipeline) do
+          Ci::Pipeline.new
+        end
+
+        it 'defines source to be unknown' do
+          expect(pipeline).to be_unknown_source
+        end
+      end
+
+      context 'when pipeline contains all needed data' do
+        let(:pipeline) do
+          Ci::Pipeline.new(
+            project: project,
+            sha: '1234',
+            ref: 'master',
+            source: :push)
+        end
+
+        context 'when the repository has a config file' do
+          before do
+            allow(project.repository).to receive(:gitlab_ci_yml_for)
               .and_return('config')
+          end
 
-        expect(pipeline.detect_ci_yaml_file).to be_a(String)
-        expect(pipeline.repository_source?).to be(true)
+          it 'defines source to be from repository' do
+            expect(pipeline).to be_repository_source
+          end
+
+          context 'when loading an object' do
+            let(:new_pipeline) { Ci::Pipeline.find(pipeline.id) }
+
+            it 'does not redefine the source' do
+              # force to overwrite the source
+              pipeline.unknown_source!
+
+              expect(new_pipeline).to be_unknown_source
+            end
           end
         end
 
-    context 'when the repo does not have a config file' do
+        context 'when the repository does not have a config file' do
           let(:implied_yml) { Gitlab::Template::GitlabCiYmlTemplate.find('Auto-DevOps').content }
 
           context 'auto devops enabled' do
             before do
-          allow_any_instance_of(ApplicationSetting)
-            .to receive(:auto_devops_enabled?) { true }
+              stub_application_setting(auto_devops_enabled: true)
+              allow(project).to receive(:ci_config_path) { 'custom' }
             end
 
-        it 'returns the implied ci file' do
-          allow(pipeline.project).to receive(:ci_config_path) { 'custom' }
+            it 'defines source to be auto devops' do
+              subject
 
-          expect(pipeline.detect_ci_yaml_file).to eq(implied_yml)
-          expect(pipeline.auto_devops_source?).to be(true)
+              expect(pipeline).to be_auto_devops_source
+            end
+          end
         end
       end
     end
@@ -870,13 +903,11 @@ describe Ci::Pipeline, :mailer do
 
     context 'when the source is auto_devops_source' do
       before do
+        stub_application_setting(auto_devops_enabled: true)
         pipeline.auto_devops_source!
       end
 
       it 'finds the implied config' do
-        allow_any_instance_of(ApplicationSetting)
-          .to receive(:auto_devops_enabled?) { true }
-
         expect(pipeline.ci_yaml_file).to eq(implied_yml)
         expect(pipeline.yaml_errors).to be_nil
       end

spec/models/project_auto_devops_spec.rb

 require 'spec_helper'
 
 describe ProjectAutoDevops do
-  subject { build_stubbed(:project_auto_devops) }
+  set(:project) { build(:project) }
 
   it { is_expected.to belong_to(:project) }
 
-  it { is_expected.to validate_presence_of(:domain) }
-
   it { is_expected.to respond_to(:created_at) }
   it { is_expected.to respond_to(:updated_at) }
 
-  it { is_expected.to be_enabled }
+  describe 'variables' do
+    let(:auto_devops) { build_stubbed(:project_auto_devops, project: project, domain: domain) }
+
+    context 'when domain is defined' do
+      let(:domain) { 'example.com' }
+
+      it 'returns AUTO_DEVOPS_DOMAIN' do
+        expect(auto_devops.variables).to include(
+          { key: 'AUTO_DEVOPS_DOMAIN', value: 'example.com', public: true })
+      end
+    end
+  end
 end

spec/models/project_spec.rb

@@ -2509,4 +2509,133 @@ describe Project do
       end
     end
   end
+
+  describe '#has_ci?' do
+    set(:project) { create(:project) }
+    let(:repository) { double }
+
+    before do
+      expect(project).to receive(:repository) { repository }
+    end
+
+    context 'when has .gitlab-ci.yml' do
+      before do
+        expect(repository).to receive(:gitlab_ci_yml) { 'content' }
+      end
+
+      it "CI is available" do
+        expect(project).to have_ci
+      end
+    end
+
+    context 'when there is no .gitlab-ci.yml' do
+      before do
+        expect(repository).to receive(:gitlab_ci_yml) { nil }
+      end
+
+      it "CI is not available" do
+        expect(project).not_to have_ci
+      end
+
+      context 'when auto devops is enabled' do
+        before do
+          stub_application_setting(auto_devops_enabled: true)
+        end
+
+        it "CI is available" do
+          expect(project).to have_ci
+        end
+      end
+    end
+  end
+
+  describe '#auto_devops_enabled?' do
+    set(:project) { create(:project) }
+
+    subject { project.auto_devops_enabled? }
+
+    context 'when enabled in settings' do
+      before do
+        stub_application_setting(auto_devops_enabled: true)
+      end
+
+      it 'auto devops is implicitly enabled' do
+        expect(project.auto_devops).to be_nil
+        expect(project).to be_auto_devops_enabled
+      end
+
+      context 'when explicitly enabled' do
+        before do
+          create(:project_auto_devops, project: project)
+        end
+
+        it "auto devops is enabled" do
+          expect(project).to be_auto_devops_enabled
+        end
+      end
+
+      context 'when explicitly disabled' do
+        before do
+          create(:project_auto_devops, project: project, enabled: false)
+        end
+
+        it "auto devops is disabled" do
+          expect(project).not_to be_auto_devops_enabled
+        end
+      end
+    end
+
+    context 'when disabled in settings' do
+      before do
+        stub_application_setting(auto_devops_enabled: false)
+      end
+
+      it 'auto devops is implicitly disabled' do
+        expect(project.auto_devops).to be_nil
+        expect(project).not_to be_auto_devops_enabled
+      end
+
+      context 'when explicitly enabled' do
+        before do
+          create(:project_auto_devops, project: project)
+        end
+
+        it "auto devops is enabled" do
+          expect(project).to be_auto_devops_enabled
+        end
+      end
+    end
+  end
+
+  context '#auto_devops_variables' do
+    set(:project) { create(:project) }
+
+    subject { project.auto_devops_variables }
+
+    context 'when enabled in settings' do
+      before do
+        stub_application_setting(auto_devops_enabled: true)
+      end
+
+      context 'when domain is empty' do
+        before do
+          create(:project_auto_devops, project: project, domain: nil)
+        end
+
+        it 'variables are empty' do
+          is_expected.to be_empty
+        end
+      end
+
+      context 'when domain is configured' do
+        before do
+          create(:project_auto_devops, project: project, domain: 'example.com')
+        end
+
+        it "variables are not empty" do
+          is_expected.not_to be_empty
+        end
+      end
+    end
+  end
 end