1 files changed, 80 insertions, 0 deletions
diff --git a/spec/lib/gitlab/ci/yaml_processor/feature_flags_spec.rb b/spec/lib/gitlab/ci/yaml_processor/feature_flags_spec.rb
new file mode 100644
index 00000000000..0bd9563d191
--- /dev/null
+++ b/spec/lib/gitlab/ci/yaml_processor/feature_flags_spec.rb
@@ -0,0 +1,80 @@
+# frozen_string_literal: true
+
+require 'fast_spec_helper'
+
+RSpec.describe Gitlab::Ci::YamlProcessor::FeatureFlags do
+  let(:feature_flag) { :my_feature_flag }
+
+  context 'when the actor is set' do
+    let(:actor) { double }
+    let(:another_actor) { double }
+
+    it 'checks the feature flag using the given actor' do
+      described_class.with_actor(actor) do
+        expect(Feature).to receive(:enabled?).with(feature_flag, actor)
+
+        described_class.enabled?(feature_flag)
+      end
+    end
+
+    it 'returns the value of the block' do
+      result = described_class.with_actor(actor) do
+        :test
+      end
+
+      expect(result).to eq(:test)
+    end
+
+    it 'restores the existing actor if any' do
+      described_class.with_actor(actor) do
+        described_class.with_actor(another_actor) do
+          expect(Feature).to receive(:enabled?).with(feature_flag, another_actor)
+
+          described_class.enabled?(feature_flag)
+        end
+
+        expect(Feature).to receive(:enabled?).with(feature_flag, actor)
+        described_class.enabled?(feature_flag)
+      end
+    end
+
+    it 'restores the actor to nil after the block' do
+      described_class.with_actor(actor) do
+        expect(Thread.current[described_class::ACTOR_KEY]).to eq(actor)
+      end
+
+      expect(Thread.current[described_class::ACTOR_KEY]).to be nil
+    end
+  end
+
+  context 'when feature flag is checked outside the "with_actor" block' do
+    it 'raises an error on dev/test environment' do
+      expect { described_class.enabled?(feature_flag) }.to raise_error(described_class::NoActorError)
+    end
+
+    context 'when on production' do
+      before do
+        allow(Gitlab::ErrorTracking).to receive(:should_raise_for_dev?).and_return(false)
+      end
+
+      it 'checks the feature flag without actor' do
+        expect(Feature).to receive(:enabled?).with(feature_flag, nil)
+        expect(Gitlab::ErrorTracking)
+          .to receive(:track_and_raise_for_dev_exception)
+          .and_call_original
+
+        described_class.enabled?(feature_flag)
+      end
+    end
+  end
+
+  context 'when actor is explicitly nil' do
+    it 'checks the feature flag without actor' do
+      described_class.with_actor(nil) do
+        expect(Feature).to receive(:enabled?).with(feature_flag, nil)
+
+        described_class.enabled?(feature_flag)
+      end
+    end
+  end
+end