1 files changed, 46 insertions, 0 deletions
diff --git a/spec/migrations/20210218040814_add_environment_scope_to_group_variables_spec.rb b/spec/migrations/20210218040814_add_environment_scope_to_group_variables_spec.rb
new file mode 100644
index 00000000000..e525101f3a0
--- /dev/null
+++ b/spec/migrations/20210218040814_add_environment_scope_to_group_variables_spec.rb
@@ -0,0 +1,46 @@
+# frozen_string_literal: true
+
+require 'spec_helper'
+require_migration!('add_environment_scope_to_group_variables')
+
+RSpec.describe AddEnvironmentScopeToGroupVariables do
+  let(:migration) { described_class.new }
+  let(:ci_group_variables) { table(:ci_group_variables) }
+  let(:group) { table(:namespaces).create!(name: 'group', path: 'group') }
+
+  def create_variable!(group, key:, environment_scope: '*')
+    table(:ci_group_variables).create!(
+      group_id: group.id,
+      key: key,
+      environment_scope: environment_scope
+    )
+  end
+
+  describe '#down' do
+    context 'group has variables with duplicate keys' do
+      it 'deletes all but the first record' do
+        migration.up
+
+        remaining_variable = create_variable!(group, key: 'key')
+        create_variable!(group, key: 'key', environment_scope: 'staging')
+        create_variable!(group, key: 'key', environment_scope: 'production')
+
+        migration.down
+
+        expect(ci_group_variables.pluck(:id)).to eq [remaining_variable.id]
+      end
+    end
+
+    context 'group does not have variables with duplicate keys' do
+      it 'does not delete any records' do
+        migration.up
+
+        create_variable!(group, key: 'key')
+        create_variable!(group, key: 'staging')
+        create_variable!(group, key: 'production')
+
+        expect { migration.down }.not_to change { ci_group_variables.count }
+      end
+    end
+  end
+end