1 files changed, 30 insertions, 0 deletions
diff --git a/spec/migrations/add_pipeline_build_foreign_key_spec.rb b/spec/migrations/add_pipeline_build_foreign_key_spec.rb
new file mode 100644
index 00000000000..7358b1d265d
--- /dev/null
+++ b/spec/migrations/add_pipeline_build_foreign_key_spec.rb
@@ -0,0 +1,30 @@
+require 'spec_helper'
+require Rails.root.join('db', 'migrate', '20180420010016_add_pipeline_build_foreign_key.rb')
+
+describe AddPipelineBuildForeignKey, :migration do
+  let(:namespaces) { table(:namespaces) }
+  let(:projects) { table(:projects) }
+  let(:pipelines) { table(:ci_pipelines) }
+  let(:builds) { 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')
+
+    builds.create!(id: 101, commit_id: 12, project_id: 11)
+    builds.create!(id: 102, commit_id: 222, project_id: 11)
+    builds.create!(id: 103, commit_id: 333, project_id: 11)
+    builds.create!(id: 104, commit_id: 12, project_id: 11)
+  end
+
+  it 'adds foreign key after removing orphans' do
+    expect(builds.all.count).to eq 4
+    expect(foreign_key_exists?(:ci_builds, :ci_pipelines, column: :commit_id)).to be_falsey
+
+    migrate!
+
+    expect(builds.all.pluck(:id)).to eq [101, 104]
+    expect(foreign_key_exists?(:ci_builds, :ci_pipelines, column: :commit_id)).to be_truthy
+  end
+end