Use tff to detect foss tests in CI

- add a job to verify tff mapping file

.gitlab/ci/rails.gitlab-ci.yml

@@ -496,11 +496,12 @@ rspec foss-impact:
     - .rails:rules:ee-mr-only
   script:
     - install_gitlab_gem
+    - install_tff_gem
     - run_timed_command "scripts/gitaly-test-build"
     - run_timed_command "scripts/gitaly-test-spawn"
     - source scripts/rspec_helpers.sh
     - tooling/bin/find_foss_tests tmp/matching_foss_tests.txt
-    - rspec_matched_tests tmp/matching_foss_tests.txt "--tag ~quarantine"
+    - rspec_matched_foss_tests tmp/matching_foss_tests.txt "--tag ~quarantine"
   artifacts:
     expire_in: 7d
     paths:

.gitlab/ci/rules.gitlab-ci.yml

@@ -149,6 +149,7 @@
   - "*_VERSION"
   - "Gemfile{,.lock}"
   - "Rakefile"
+  - "tests.yml"
   - "config.ru"
   - "{,ee/}{app,bin,config,db,haml_lint,lib,locale,public,scripts,symbol,vendor}/**/*"
   - "doc/api/graphql/reference/*"  # Files in this folder are auto-generated
@@ -170,6 +171,7 @@
   - "*_VERSION"
   - "Gemfile{,.lock}"
   - "Rakefile"
+  - "tests.yml"
   - "config.ru"
   - "{,ee/}{app,bin,config,db,haml_lint,lib,locale,public,scripts,symbol,vendor}/**/*"
   - "doc/api/graphql/reference/*"  # Files in this folder are auto-generated
@@ -193,6 +195,7 @@
   - "*_VERSION"
   - "Gemfile{,.lock}"
   - "Rakefile"
+  - "tests.yml"
   - "config.ru"
   - "{,ee/}{app,bin,config,db,haml_lint,lib,locale,public,scripts,symbol,vendor}/**/*"
   - "doc/api/graphql/reference/*"  # Files in this folder are auto-generated
@@ -213,6 +216,7 @@
   - "*_VERSION"
   - "Gemfile{,.lock}"
   - "Rakefile"
+  - "tests.yml"
   - "config.ru"
   - "{,ee/}{app,bin,config,db,haml_lint,lib,locale,public,scripts,symbol,vendor}/**/*"
   - "doc/api/graphql/reference/*"  # Files in this folder are auto-generated
@@ -762,6 +766,12 @@
       changes: *code-backstage-patterns
       when: on_success
 
+.setup:rules:verify-tests-yml:
+  rules:
+    - <<: *if-default-refs
+      changes: *code-backstage-patterns
+      when: on_success
+
 #######################
 # Test metadata rules #
 #######################

.gitlab/ci/setup.gitlab-ci.yml

@@ -48,3 +48,14 @@ no_ee_check:
   stage: test
   script:
     - scripts/no-ee-check
+
+verify-tests-yml:
+  extends:
+    - .setup:rules:verify-tests-yml
+  image: ruby:2.6-alpine
+  stage: test
+  needs: []
+  script:
+    - source scripts/utils.sh
+    - install_tff_gem
+    - scripts/verify-tff-mapping

lib/gitlab/danger/helper.rb

@@ -171,6 +171,7 @@ module Gitlab
         %r{\A(ee/)?scripts/} => :engineering_productivity,
         %r{\Atooling/} => :engineering_productivity,
         %r{(CODEOWNERS)} => :engineering_productivity,
+        %r{(tests.yml)} => :engineering_productivity,
 
         %r{\A(ee/)?spec/features/} => :test,
         %r{\A(ee/)?spec/support/shared_examples/features/} => :test,

scripts/rspec_helpers.sh

@@ -111,7 +111,7 @@ function rspec_paralellized_job() {
   date
 }
 
-function rspec_matched_tests() {
+function rspec_matched_foss_tests() {
   local test_file_count_threshold=20
   local matching_tests_file=${1}
   local rspec_opts=${2}
@@ -131,6 +131,6 @@ function rspec_matched_tests() {
   if [[ -n $test_files ]]; then
     rspec_simple_job "${rspec_opts} ${test_files}"
   else
-    echo "No test files to run"
+    echo "No FOSS test files to run"
   fi
 }

scripts/utils.sh

@@ -35,6 +35,10 @@ function install_gitlab_gem() {
   gem install gitlab --no-document --version 4.13.0
 }
 
+function install_tff_gem() {
+  gem install test_file_finder --version 0.1.0
+}
+
 function run_timed_command() {
   local cmd="${1}"
   local start=$(date +%s)

scripts/verify-tff-mapping

+#!/usr/bin/env ruby
+
+require 'set'
+
+# These tests run a sanity check on the mapping file `tests.yml`
+# used with the `test_file_finder` gem (`tff`) to identify matching test files.
+# The verification depend on the presence of actual test files,
+# so they would fail if one of the test files mentioned here is deleted.
+# To minimize the chance of this test failing due to unrelated changes,
+# the test files are chosen to be critical files that are unlikely to be deleted in a typical Merge Request
+tests = [
+  {
+    explanation: 'EE code should map to respective spec',
+    source: 'ee/app/controllers/admin/licenses_controller.rb',
+    expected: ['ee/spec/controllers/admin/licenses_controller_spec.rb']
+  },
+
+  {
+    explanation: 'FOSS code should map to respective spec',
+    source: 'app/finders/admin/projects_finder.rb',
+    expected: ['spec/finders/admin/projects_finder_spec.rb']
+  },
+
+  {
+    explanation: 'EE extension should map to its EE extension spec and its FOSS class spec',
+    source: 'ee/app/finders/ee/projects_finder.rb',
+    expected: ['ee/spec/finders/ee/projects_finder_spec.rb', 'spec/finders/projects_finder_spec.rb']
+  },
+
+  {
+    explanation: 'Some EE extensions also map to its EE class spec, but this is not recommended: https://docs.gitlab.com/ee/development/ee_features.html#testing-ee-features-based-on-ce-features',
+    source: 'ee/app/models/ee/user.rb',
+    expected: ['ee/spec/models/user_spec.rb', 'spec/models/user_spec.rb']
+  },
+
+  {
+    explanation: 'FOSS lib should map to respective spec',
+    source: 'lib/gitaly/server.rb',
+    expected: ['spec/lib/gitaly/server_spec.rb']
+  },
+
+  {
+    explanation: 'EE lib should map to respective spec',
+    source: 'ee/lib/flipper_session.rb',
+    expected: ['ee/spec/lib/flipper_session_spec.rb']
+  },
+
+  {
+    explanation: 'Tooling should map to respective spec',
+    source: 'tooling/lib/tooling/test_file_finder.rb',
+    expected: ['spec/tooling/lib/tooling/test_file_finder_spec.rb']
+  },
+
+  {
+    explanation: 'FOSS spec code should map to itself',
+    source: 'spec/models/issue_spec.rb',
+    expected: ['spec/models/issue_spec.rb']
+  },
+
+  {
+    explanation: 'EE spec code should map to itself',
+    source: 'ee/spec/models/user_spec.rb',
+    expected: ['ee/spec/models/user_spec.rb']
+  },
+
+  {
+    explanation: 'EE extension spec should map to itself and the FOSS class spec',
+    source: 'ee/spec/services/ee/notification_service_spec.rb',
+    expected: ['ee/spec/services/ee/notification_service_spec.rb', 'spec/services/notification_service_spec.rb']
+  },
+
+  {
+    explanation: 'FOSS factory should map to factories spec',
+    source: 'spec/factories/users.rb',
+    expected: ['spec/factories_spec.rb']
+  },
+
+  {
+    explanation: 'EE factory should map to factories spec',
+    source: 'ee/spec/factories/users.rb',
+    expected: ['spec/factories_spec.rb']
+  },
+
+  {
+    explanation: 'Initializers should map to respective spec',
+    source: 'config/initializers/action_mailer_hooks.rb',
+    expected: ['spec/initializers/action_mailer_hooks_spec.rb']
+  },
+
+  {
+    explanation: 'FOSS views should map to respective spec',
+    source: 'app/views/admin/users/_user.html.haml',
+    expected: ['spec/views/admin/users/_user.html.haml_spec.rb']
+  },
+
+  {
+    explanation: 'EE views should map to respective spec',
+    source: 'ee/app/views/admin/licenses/show.html.haml',
+    expected: ['ee/spec/views/admin/licenses/show.html.haml_spec.rb']
+  },
+
+  {
+    explanation: 'DB structure should map to schema spec',
+    source: 'db/structure.sql',
+    expected: ['spec/db/schema_spec.rb']
+  },
+
+  {
+    explanation: 'Migration should map to its non-timestamped spec',
+    source: 'db/migrate/20191023152913_add_default_and_free_plans.rb',
+    expected: ['spec/migrations/add_default_and_free_plans_spec.rb']
+  },
+
+  {
+    explanation: 'Migration should map to its timestamped spec',
+    source: 'db/post_migrate/20190924152703_migrate_issue_trackers_data.rb',
+    expected: ['spec/migrations/20190924152703_migrate_issue_trackers_data_spec.rb']
+  }
+]
+
+class MappingTest
+  def initialize(explanation:, source:, expected:, mapping: 'tests.yml')
+    @explanation = explanation
+    @source = source
+    @mapping = mapping
+    @expected_set = Set.new(expected)
+    @actual_set = Set.new(actual)
+  end
+
+  def passed?
+    expected_set.eql?(actual_set)
+  end
+
+  def failed?
+    !passed?
+  end
+
+  def failure_message
+    "#{explanation}: #{source}: Expected #{expected_set.to_a}, got #{actual_set.to_a}."
+  end
+
+  private
+
+  attr_reader :explanation, :source, :expected_set, :actual_set, :mapping
+
+  def actual
+    `tff -f #{mapping} #{source}`.split(' ')
+  end
+end
+
+results = tests.map { |test| MappingTest.new(test) }
+
+failed_tests = results.select(&:failed?)
+if failed_tests.any?
+  puts <<~MESSAGE
+    tff mapping verification failed:
+    #{failed_tests.map(&:failure_message).join("\n")}
+  MESSAGE
+
+  exit 1
+end
+
+puts 'tff mapping verification passed.'

tests.yml

+mapping:
+  # EE code should map to respective spec
+  - source: ee/app/(.+)\.rb
+    test: ee/spec/%s_spec.rb
+  # FOSS code should map to respective spec
+  - source: app/(.+)\.rb
+    test: spec/%s_spec.rb
+
+  # EE extension should also map to its FOSS class spec
+  - source: ee/app/(.*/)ee/(.+)\.rb
+    test: spec/%s%s_spec.rb
+
+  # Some EE extensions also map to its EE class spec, but this is not recommended:
+  # https://docs.gitlab.com/ee/development/ee_features.html#testing-ee-features-based-on-ce-features
+  - source: ee/app/(.*/)ee/(.+)\.rb
+    test: ee/spec/%s%s_spec.rb
+
+  # EE lib should map to respective spec
+  - source: ee/lib/(.+)\.rb
+    test: ee/spec/lib/%s_spec.rb
+
+  # FOSS lib & tooling should map to respective spec
+  - source: (tooling/)?lib/(.+)\.rb
+    test: spec/%slib/%s_spec.rb
+
+  # Initializers should map to respective spec
+  - source: config/initializers/(.+)\.rb
+    test: spec/initializers/%s_spec.rb
+
+  # DB structure should map to schema spec
+  - source: db/structure.sql
+    test: spec/db/schema_spec.rb
+
+  # Migration should map to either timestamped or non-timestamped spec
+  - source: db/(?:post_)?migrate/(?:[0-9]+)_(.+)\.rb
+    test: spec/migrations/%s_spec.rb
+  - source: db/(?:post_)?migrate/([0-9]+)_(.+)\.rb
+    test: spec/migrations/%s_%s_spec.rb
+
+  # EE/FOSS views should map to respective spec
+  - source: (ee/)?app/views/(.+)\.haml
+    test: '%sspec/views/%s.haml_spec.rb'
+
+  # EE/FOSS spec code should map to itself
+  - source: (ee/)?spec/(.+)_spec\.rb
+    test: '%sspec/%s_spec.rb'
+
+  # EE extension spec should map to its FOSS class spec
+  - source: ee/spec/(.*/)ee/(.+)\.rb
+    test: spec/%s%s.rb
+
+  # EE/FOSS factory should map to factories spec
+  - source: (ee/)?spec/factories/.+\.rb
+    test: spec/factories_spec.rb

tooling/bin/find_foss_tests

 #!/usr/bin/env ruby
 # frozen_string_literal: true
 
-require_relative '../../lib/gitlab/popen'
-require_relative '../lib/tooling/test_file_finder'
-
 require 'gitlab'
+require 'test_file_finder'
 
 gitlab_token = ENV.fetch('DANGER_GITLAB_API_TOKEN', '')
 
@@ -21,9 +19,7 @@ mr_iid = ENV.fetch('CI_MERGE_REQUEST_IID')
 mr_changes = Gitlab.merge_request_changes(mr_project_path, mr_iid)
 changed_files = mr_changes.changes.map { |change| change['new_path'] }
 
-tests_to_run = changed_files.flat_map do |file|
-  test_files = Tooling::TestFileFinder.new(file, foss_test_only: true).test_files
-  test_files.select { |f| File.exist?(f) }
-end
+mapping = TestFileFinder::Mapping.load('tests.yml')
+test_files = TestFileFinder::FileFinder.new(paths: changed_files, mapping: mapping).test_files
 
-File.write(output_file, tests_to_run.uniq.join(' '))
+File.write(output_file, test_files.uniq.join(' '))