1 files changed, 54 insertions, 0 deletions
diff --git a/spec/lib/gitlab/background_migration/migrate_build_stage_spec.rb b/spec/lib/gitlab/background_migration/migrate_build_stage_spec.rb
new file mode 100644
index 00000000000..e112e9e9e3d
--- /dev/null
+++ b/spec/lib/gitlab/background_migration/migrate_build_stage_spec.rb
@@ -0,0 +1,54 @@
+require 'spec_helper'
+
+describe Gitlab::BackgroundMigration::MigrateBuildStage, :migration, schema: 20180212101928 do
+  let(:projects) { table(:projects) }
+  let(:pipelines) { table(:ci_pipelines) }
+  let(:stages) { table(:ci_stages) }
+  let(:jobs) { table(:ci_builds) }
+
+  STATUSES = { created: 0, pending: 1, running: 2, success: 3,
+               failed: 4, canceled: 5, skipped: 6, manual: 7 }.freeze
+
+  before do
+    projects.create!(id: 123, name: 'gitlab', path: 'gitlab-ce')
+    pipelines.create!(id: 1, project_id: 123, ref: 'master', sha: 'adf43c3a')
+
+    jobs.create!(id: 1, commit_id: 1, project_id: 123,
+                 stage_idx: 2, stage: 'build', status: :success)
+    jobs.create!(id: 2, commit_id: 1, project_id: 123,
+                 stage_idx: 2, stage: 'build', status: :success)
+    jobs.create!(id: 3, commit_id: 1, project_id: 123,
+                 stage_idx: 1, stage: 'test', status: :failed)
+    jobs.create!(id: 4, commit_id: 1, project_id: 123,
+                 stage_idx: 1, stage: 'test', status: :success)
+    jobs.create!(id: 5, commit_id: 1, project_id: 123,
+                 stage_idx: 3, stage: 'deploy', status: :pending)
+    jobs.create!(id: 6, commit_id: 1, project_id: 123,
+                 stage_idx: 3, stage: nil, status: :pending)
+  end
+
+  it 'correctly migrates builds stages' do
+    expect(stages.count).to be_zero
+
+    described_class.new.perform(1, 6)
+
+    expect(stages.count).to eq 3
+    expect(stages.all.pluck(:name)).to match_array %w[test build deploy]
+    expect(jobs.where(stage_id: nil)).to be_one
+    expect(jobs.find_by(stage_id: nil).id).to eq 6
+    expect(stages.all.pluck(:status)).to match_array [STATUSES[:success],
+                                                      STATUSES[:failed],
+                                                      STATUSES[:pending]]
+  end
+
+  it 'recovers from unique constraint violation only twice' do
+    allow(described_class::Migratable::Stage)
+      .to receive(:find_by).and_return(nil)
+
+    expect(described_class::Migratable::Stage)
+      .to receive(:find_by).exactly(3).times
+
+    expect { described_class.new.perform(1, 6) }
+      .to raise_error ActiveRecord::RecordNotUnique
+  end
+end