Added exists rule E2E test

spec/services/ci/create_pipeline_service/rules_spec.rb

+# frozen_string_literal: true
+
+require 'spec_helper'
+
+describe Ci::CreatePipelineService do
+  context 'rules' do
+    let(:user)        { create(:admin) }
+    let(:ref)         { 'refs/heads/master' }
+    let(:source)      { :push }
+    let(:service)     { described_class.new(project, user, { ref: ref }) }
+    let(:pipeline)    { service.execute(source) }
+    let(:build_names) { pipeline.builds.pluck(:name) }
+
+    before do
+      stub_ci_pipeline_yaml_file(config)
+      allow_any_instance_of(Ci::BuildScheduleWorker).to receive(:perform).and_return(true)
+    end
+
+    context 'exists:' do
+      let(:config) do
+        <<-EOY
+        regular-job:
+          script: 'echo Hello, World!'
+
+        rules-job:
+          script: "echo hello world, $CI_COMMIT_REF_NAME"
+          rules:
+            - exists:
+              - README.md
+              when: manual
+            - exists:
+              - app.rb
+              when: on_success
+
+        delayed-job:
+          script: "echo See you later, World!"
+          rules:
+            - exists:
+              - README.md
+              when: delayed
+              start_in: 4 hours
+        EOY
+      end
+      let(:regular_job) { pipeline.builds.find_by(name: 'regular-job') }
+      let(:rules_job)   { pipeline.builds.find_by(name: 'rules-job') }
+      let(:delayed_job) { pipeline.builds.find_by(name: 'delayed-job') }
+
+      context 'with matches' do
+        let(:project) { create(:project, :custom_repo, files: { 'README.md' => '' }) }
+
+        it 'creates two jobs' do
+          expect(pipeline).to be_persisted
+          expect(build_names).to contain_exactly('regular-job', 'rules-job', 'delayed-job')
+        end
+
+        it 'sets when: for all jobs' do
+          expect(regular_job.when).to eq('on_success')
+          expect(rules_job.when).to eq('manual')
+          expect(delayed_job.when).to eq('delayed')
+          expect(delayed_job.options[:start_in]).to eq('4 hours')
+        end
+      end
+
+      context 'with matches on the second rule' do
+        let(:project) { create(:project, :custom_repo, files: { 'app.rb' => '' }) }
+
+        it 'includes both jobs' do
+          expect(pipeline).to be_persisted
+          expect(build_names).to contain_exactly('regular-job', 'rules-job')
+        end
+
+        it 'sets when: for the created rules job based on the second clause' do
+          expect(regular_job.when).to eq('on_success')
+          expect(rules_job.when).to eq('on_success')
+        end
+      end
+
+      context 'without matches' do
+        let(:project) { create(:project, :custom_repo, files: { 'useless_script.rb' => '' }) }
+
+        it 'only persists the job without rules' do
+          expect(pipeline).to be_persisted
+          expect(regular_job).to be_persisted
+          expect(rules_job).to be_nil
+          expect(delayed_job).to be_nil
+        end
+
+        it 'sets when: for the created job' do
+          expect(regular_job.when).to eq('on_success')
+        end
+      end
+    end
+  end
+end