1 files changed, 35 insertions, 0 deletions
diff --git a/spec/lib/gitlab/background_migration/migrate_stage_index_spec.rb b/spec/lib/gitlab/background_migration/migrate_stage_index_spec.rb
new file mode 100644
index 00000000000..f8107dd40b9
--- /dev/null
+++ b/spec/lib/gitlab/background_migration/migrate_stage_index_spec.rb
@@ -0,0 +1,35 @@
+require 'spec_helper'
+
+describe Gitlab::BackgroundMigration::MigrateStageIndex, :migration, schema: 20180420080616 do
+  let(:namespaces) { table(:namespaces) }
+  let(:projects) { table(:projects) }
+  let(:pipelines) { table(:ci_pipelines) }
+  let(:stages) { table(:ci_stages) }
+  let(:jobs) { table(:ci_builds) }
+
+  before do
+    namespaces.create(id: 10, name: 'gitlab-org', path: 'gitlab-org')
+    projects.create!(id: 11, namespace_id: 10, name: 'gitlab', path: 'gitlab')
+    pipelines.create!(id: 12, project_id: 11, ref: 'master', sha: 'adf43c3a')
+
+    stages.create(id: 100, project_id: 11, pipeline_id: 12, name: 'build')
+    stages.create(id: 101, project_id: 11, pipeline_id: 12, name: 'test')
+
+    jobs.create!(id: 121, commit_id: 12, project_id: 11,
+                 stage_idx: 2, stage_id: 100)
+    jobs.create!(id: 122, commit_id: 12, project_id: 11,
+                 stage_idx: 2, stage_id: 100)
+    jobs.create!(id: 123, commit_id: 12, project_id: 11,
+                 stage_idx: 10, stage_id: 100)
+    jobs.create!(id: 124, commit_id: 12, project_id: 11,
+                 stage_idx: 3, stage_id: 101)
+  end
+
+  it 'correctly migrates stages indices' do
+    expect(stages.all.pluck(:position)).to all(be_nil)
+
+    described_class.new.perform(100, 101)
+
+    expect(stages.all.pluck(:position)).to eq [2, 3]
+  end
+end