1 files changed, 77 insertions, 0 deletions
diff --git a/spec/services/ci/list_config_variables_service_spec.rb b/spec/services/ci/list_config_variables_service_spec.rb
new file mode 100644
index 00000000000..5cc0481768b
--- /dev/null
+++ b/spec/services/ci/list_config_variables_service_spec.rb
@@ -0,0 +1,77 @@
+# frozen_string_literal: true
+
+require 'spec_helper'
+
+RSpec.describe Ci::ListConfigVariablesService do
+  let_it_be(:project) { create(:project, :repository) }
+  let(:service) { described_class.new(project) }
+  let(:result) { YAML.dump(ci_config) }
+
+  subject { service.execute(sha) }
+
+  before do
+    stub_gitlab_ci_yml_for_sha(sha, result)
+  end
+
+  context 'when sending a valid sha' do
+    let(:sha) { 'master' }
+    let(:ci_config) do
+      {
+        variables: {
+          KEY1: { value: 'val 1', description: 'description 1' },
+          KEY2: { value: 'val 2', description: '' },
+          KEY3: { value: 'val 3' },
+          KEY4: 'val 4'
+        },
+        test: {
+          stage: 'test',
+          script: 'echo'
+        }
+      }
+    end
+
+    it 'returns variable list' do
+      expect(subject['KEY1']).to eq({ value: 'val 1', description: 'description 1' })
+      expect(subject['KEY2']).to eq({ value: 'val 2', description: '' })
+      expect(subject['KEY3']).to eq({ value: 'val 3', description: nil })
+      expect(subject['KEY4']).to eq({ value: 'val 4', description: nil })
+    end
+  end
+
+  context 'when sending an invalid sha' do
+    let(:sha) { 'invalid-sha' }
+    let(:ci_config) { nil }
+
+    it 'returns empty json' do
+      expect(subject).to eq({})
+    end
+  end
+
+  context 'when sending an invalid config' do
+    let(:sha) { 'master' }
+    let(:ci_config) do
+      {
+        variables: {
+          KEY1: { value: 'val 1', description: 'description 1' }
+        },
+        test: {
+          stage: 'invalid',
+          script: 'echo'
+        }
+      }
+    end
+
+    it 'returns empty result' do
+      expect(subject).to eq({})
+    end
+  end
+
+  private
+
+  def stub_gitlab_ci_yml_for_sha(sha, result)
+    allow_any_instance_of(Repository)
+        .to receive(:gitlab_ci_yml_for)
+        .with(sha, '.gitlab-ci.yml')
+        .and_return(result)
+  end
+end