優雅的 RSpec 測試 - 前置處理

 1RSpec.describe Order do
 2  subject(:order) { Order.new }
 3
 4  before do
 5    order.add_item(OrderItem.new(amount: 100))
 6    order.add_item(OrderItem.new(amount: 100))
 7  end
 8
 9  it { is_expected.to have_attributes(subtotal: 200) }
10  it { is_expected.to have_attributes(items_count: 2) }
11end

 1RSpec.describe Worker do
 2  subject(:worker) { Worker.new { true } }
 3
 4  describe "#execute" do
 5    subject { worker.execute }
 6
 7    before { Worker.mode = :inline }
 8    after { Worker.mode = :async }
 9
10    it { is_expected.to be_truthy }
11  end
12end

 1RSpec.describe Parser do
 2  subject(:parser) { Parser.new }
 3
 4  describe '#parse' do
 5    subject { parser.parse }
 6
 7    around do |example|
 8      temp_data = Tempfile.new
 9      temp_data.write('{ "data": "example" }')
10      temp_data.rewind
11      parser.add(temp_data)
12
13      example.run
14
15      temp_data.unlink
16    end
17
18    it { is_expected.to include('data' => 'example')}
19  end
20end

 1RSpec.describe Worker do
 2  around(:suite) do |example|
 3    Worker.inline! { example.run }
 4  end
 5
 6  context 'when worker not in parallel' do
 7    before(:all) { Worker.max_job = 1 }
 8
 9    # ...
10  end
11end