1 files changed, 83 insertions, 0 deletions
diff --git a/spec/tooling/danger/outdated_todo_spec.rb b/spec/tooling/danger/outdated_todo_spec.rb
new file mode 100644
index 00000000000..3a3909c69ac
--- /dev/null
+++ b/spec/tooling/danger/outdated_todo_spec.rb
@@ -0,0 +1,83 @@
+# frozen_string_literal: true
+
+require 'fast_spec_helper'
+require 'gitlab/dangerfiles/spec_helper'
+
+require_relative '../../../tooling/danger/outdated_todo'
+
+RSpec.describe Tooling::Danger::OutdatedTodo, feature_category: :tooling do
+  let(:fake_danger) { double }
+  let(:filenames) { ['app/controllers/application_controller.rb'] }
+
+  let(:todos) do
+    [
+      File.join('spec', 'fixtures', 'tooling', 'danger', 'rubocop_todo', '**', '*.yml')
+    ]
+  end
+
+  subject(:plugin) { described_class.new(filenames, context: fake_danger, todos: todos) }
+
+  context 'when the filenames are mentioned in single todo' do
+    let(:filenames) { ['app/controllers/acme_challenges_controller.rb'] }
+
+    it 'warns about mentions' do
+      expect(fake_danger)
+        .to receive(:warn)
+        .with <<~MESSAGE
+          `app/controllers/acme_challenges_controller.rb` was removed but is mentioned in:
+          - `spec/fixtures/tooling/danger/rubocop_todo/cop1.yml:5`
+        MESSAGE
+
+      plugin.check
+    end
+  end
+
+  context 'when the filenames are mentioned in multiple todos' do
+    let(:filenames) do
+      [
+        'app/controllers/application_controller.rb',
+        'app/controllers/acme_challenges_controller.rb'
+      ]
+    end
+
+    it 'warns about mentions' do
+      expect(fake_danger)
+        .to receive(:warn)
+        .with(<<~FIRSTMESSAGE)
+          `app/controllers/application_controller.rb` was removed but is mentioned in:
+          - `spec/fixtures/tooling/danger/rubocop_todo/cop1.yml:4`
+          - `spec/fixtures/tooling/danger/rubocop_todo/cop2.yml:4`
+        FIRSTMESSAGE
+
+      expect(fake_danger)
+        .to receive(:warn)
+        .with(<<~SECONDMESSAGE)
+          `app/controllers/acme_challenges_controller.rb` was removed but is mentioned in:
+          - `spec/fixtures/tooling/danger/rubocop_todo/cop1.yml:5`
+        SECONDMESSAGE
+
+      plugin.check
+    end
+  end
+
+  context 'when the filenames are not mentioned in todos' do
+    let(:filenames) { ['any/inexisting/file.rb'] }
+
+    it 'does not warn' do
+      expect(fake_danger).not_to receive(:warn)
+
+      plugin.check
+    end
+  end
+
+  context 'when there is no todos' do
+    let(:filenames) { ['app/controllers/acme_challenges_controller.rb'] }
+    let(:todos) { [] }
+
+    it 'does not warn' do
+      expect(fake_danger).not_to receive(:warn)
+
+      plugin.check
+    end
+  end
+end