spec/migrations/remove_empty_fork_networks_spec.rb


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require 'spec_helper'
require Rails.root.join('db', 'post_migrate', '20171114104051_remove_empty_fork_networks.rb')

describe RemoveEmptyForkNetworks, :migration do
  let!(:fork_networks) { table(:fork_networks) }
  let!(:projects) { table(:projects) }
  let!(:fork_network_members) { table(:fork_network_members) }

  let(:deleted_project) { projects.create! }
  let!(:empty_network) { fork_networks.create!(id: 1, root_project_id: deleted_project.id) }
  let!(:other_network) { fork_networks.create!(id: 2, root_project_id: projects.create.id) }

  before do
    fork_network_members.create(fork_network_id: empty_network.id,
                                project_id: empty_network.root_project_id)
    fork_network_members.create(fork_network_id: other_network.id,
                                project_id: other_network.root_project_id)

    deleted_project.destroy!
  end

  after do
    Upload.reset_column_information
  end

  it 'deletes only the fork network without members' do
    expect(fork_networks.count).to eq(2)

    migrate!

    expect(fork_networks.find_by(id: empty_network.id)).to be_nil
    expect(fork_networks.find_by(id: other_network.id)).not_to be_nil
    expect(fork_networks.count).to eq(1)
  end
end