Merge branch 'add-flutter-cicd-template' into 'master'

Add flutter cicd template

See merge request gitlab-org/gitlab!46968

changelogs/unreleased/add-flutter-cicd-template.yml

+---
+title: Add flutter CI/CD template
+merge_request: 46968
+author:
+type: added

lib/gitlab/ci/templates/Flutter.gitlab-ci.yml

+code_quality:
+  stage: test
+  image: "cirrusci/flutter:1.22.5"
+  before_script:
+    - pub global activate dart_code_metrics
+    - export PATH="$PATH":"$HOME/.pub-cache/bin"
+  script:
+    - metrics lib -r codeclimate  > gl-code-quality-report.json
+  artifacts:
+    reports:
+      codequality: gl-code-quality-report.json
+
+test:
+  stage: test
+  image: "cirrusci/flutter:1.22.5"
+  before_script:
+    - pub global activate junitreport
+    - export PATH="$PATH":"$HOME/.pub-cache/bin"
+  script:
+    - flutter test --machine --coverage | tojunit -o report.xml
+    - lcov --summary coverage/lcov.info
+    - genhtml coverage/lcov.info --output=coverage
+  coverage: '/lines\.*: \d+\.\d+\%/'
+  artifacts:
+    name: coverage
+    paths:
+      - $CI_PROJECT_DIR/coverage
+    reports:
+      junit: report.xml

spec/lib/gitlab/ci/templates/flutter_gitlab_ci_yaml_spec.rb

+# frozen_string_literal: true
+
+require 'spec_helper'
+
+RSpec.describe 'Flutter.gitlab-ci.yml' do
+  subject(:template) { Gitlab::Template::GitlabCiYmlTemplate.find('Flutter') }
+
+  describe 'the created pipeline' do
+    let_it_be(:user) { create(:admin) }
+
+    let(:pipeline_branch) { 'master' }
+    let(:project) { create(:project, :custom_repo, files: { 'README.md' => '' }) }
+    let(:service) { Ci::CreatePipelineService.new(project, user, ref: pipeline_branch ) }
+    let(:pipeline) { service.execute!(:push) }
+    let(:build_names) { pipeline.builds.pluck(:name) }
+
+    before do
+      stub_ci_pipeline_yaml_file(template.content)
+      allow(Ci::BuildScheduleWorker).to receive(:perform).and_return(true)
+    end
+
+    it 'creates test and code_quality jobs' do
+      expect(build_names).to include('test', 'code_quality')
+    end
+  end
+end