1 files changed, 73 insertions, 0 deletions
diff --git a/spec/lib/expand_variables_spec.rb b/spec/lib/expand_variables_spec.rb
new file mode 100644
index 00000000000..90bc7dad379
--- /dev/null
+++ b/spec/lib/expand_variables_spec.rb
@@ -0,0 +1,73 @@
+require 'spec_helper'
+
+describe ExpandVariables do
+  describe '#expand' do
+    subject { described_class.expand(value, variables) }
+
+    tests = [
+      { value: 'key',
+        result: 'key',
+        variables: []
+      },
+      { value: 'key$variable',
+        result: 'key',
+        variables: []
+      },
+      { value: 'key$variable',
+        result: 'keyvalue',
+        variables: [
+          { key: 'variable', value: 'value' }
+        ]
+      },
+      { value: 'key${variable}',
+        result: 'keyvalue',
+        variables: [
+          { key: 'variable', value: 'value' }
+        ]
+      },
+      { value: 'key$variable$variable2',
+        result: 'keyvalueresult',
+        variables: [
+          { key: 'variable', value: 'value' },
+          { key: 'variable2', value: 'result' },
+        ]
+      },
+      { value: 'key${variable}${variable2}',
+        result: 'keyvalueresult',
+        variables: [
+          { key: 'variable', value: 'value' },
+          { key: 'variable2', value: 'result' }
+        ]
+      },
+      { value: 'key$variable2$variable',
+        result: 'keyresultvalue',
+        variables: [
+          { key: 'variable', value: 'value' },
+          { key: 'variable2', value: 'result' },
+        ]
+      },
+      { value: 'key${variable2}${variable}',
+        result: 'keyresultvalue',
+        variables: [
+          { key: 'variable', value: 'value' },
+          { key: 'variable2', value: 'result' }
+        ]
+      },
+      { value: 'review/$CI_BUILD_REF_NAME',
+        result: 'review/feature/add-review-apps',
+        variables: [
+          { key: 'CI_BUILD_REF_NAME', value: 'feature/add-review-apps' }
+        ]
+      },
+    ]
+
+    tests.each do |test|
+      context "#{test[:value]} resolves to #{test[:result]}" do
+        let(:value) { test[:value] }
+        let(:variables) { test[:variables] }
+
+        it { is_expected.to eq(test[:result]) }
+      end
+    end
+  end
+end