1 files changed, 45 insertions, 0 deletions
diff --git a/spec/lib/gitlab/ci/variables/collection/item_spec.rb b/spec/lib/gitlab/ci/variables/collection/item_spec.rb
index 42fbb88cceb..d806c466309 100644
--- a/spec/lib/gitlab/ci/variables/collection/item_spec.rb
+++ b/spec/lib/gitlab/ci/variables/collection/item_spec.rb
@@ -70,6 +70,43 @@ RSpec.describe Gitlab::Ci::Variables::Collection::Item do
     end
   end
 
+  describe '#depends_on' do
+    let(:item) { Gitlab::Ci::Variables::Collection::Item.new(**variable) }
+
+    subject { item.depends_on }
+
+    context 'table tests' do
+      using RSpec::Parameterized::TableSyntax
+
+      where do
+        {
+          "no variable references": {
+            variable: { key: 'VAR', value: 'something' },
+            expected_depends_on: nil
+          },
+          "simple variable reference": {
+            variable: { key: 'VAR', value: 'something_$VAR2' },
+            expected_depends_on: %w(VAR2)
+          },
+          "complex expansion": {
+            variable: { key: 'VAR', value: 'something_${VAR2}_$VAR3' },
+            expected_depends_on: %w(VAR2 VAR3)
+          },
+          "complex expansions for Windows": {
+            variable: { key: 'variable3', value: 'key%variable%%variable2%' },
+            expected_depends_on: %w(variable variable2)
+          }
+        }
+      end
+
+      with_them do
+        it 'contains referenced variable names' do
+          is_expected.to eq(expected_depends_on)
+        end
+      end
+    end
+  end
+
   describe '.fabricate' do
     it 'supports using a hash' do
       resource = described_class.fabricate(variable)
@@ -140,5 +177,13 @@ RSpec.describe Gitlab::Ci::Variables::Collection::Item do
           .to eq(key: 'VAR', value: 'value', public: true, file: true, masked: false)
       end
     end
+
+    context 'when referencing a variable' do
+      it '#depends_on contains names of dependencies' do
+        runner_variable = described_class.new(key: 'CI_VAR', value: '${CI_VAR_2}-123-$CI_VAR_3')
+
+        expect(runner_variable.depends_on).to eq(%w(CI_VAR_2 CI_VAR_3))
+      end
+    end
   end
 end