Revert "Merge branch 'revert-04c3c6dd' into 'master'"

This reverts commit 744f1f2e7037f5c70c3168d9e2e89b1c327465d2, reversing
changes made to c4d930e5f54e7da07c80cc028dfc0f5c08719146.

1 files changed, 75 insertions, 0 deletions

diff --git a/lib/quality/test_level.rb b/lib/quality/test_level.rb
new file mode 100644
index 00000000000..24d8eac200c
--- /dev/null
+++ b/lib/quality/test_level.rb
@@ -0,0 +1,75 @@
+# frozen_string_literal: true
+
+module Quality
+  class TestLevel
+    UnknownTestLevelError = Class.new(StandardError)
+
+    TEST_LEVEL_FOLDERS = {
+      unit: %w[
+        bin
+        config
+        db
+        dependencies
+        factories
+        finders
+        frontend
+        graphql
+        helpers
+        initializers
+        javascripts
+        lib
+        migrations
+        models
+        policies
+        presenters
+        rack_servers
+        routing
+        rubocop
+        serializers
+        services
+        sidekiq
+        tasks
+        uploaders
+        validators
+        views
+        workers
+        elastic_integration
+      ],
+      integration: %w[
+        controllers
+        mailers
+        requests
+      ],
+      system: ['features']
+    }.freeze
+
+    attr_reader :prefix
+
+    def initialize(prefix = nil)
+      @prefix = prefix
+      @patterns = {}
+      @regexps = {}
+    end
+
+    def pattern(level)
+      @patterns[level] ||= "#{prefix}spec/{#{TEST_LEVEL_FOLDERS.fetch(level).join(',')}}{,/**/}*_spec.rb".freeze
+    end
+
+    def regexp(level)
+      @regexps[level] ||= Regexp.new("#{prefix}spec/(#{TEST_LEVEL_FOLDERS.fetch(level).join('|')})").freeze
+    end
+
+    def level_for(file_path)
+      case file_path
+      when regexp(:unit)
+        :unit
+      when regexp(:integration)
+        :integration
+      when regexp(:system)
+        :system
+      else
+        raise UnknownTestLevelError, "Test level for #{file_path} couldn't be set. Please rename the file properly or change the test level detection regexes in #{__FILE__}."
+      end
+    end
+  end
+end