Question

我的rspec测试看起来像这样：

describe 'on DELETE to :destroy' do
  before do
    expect { delete :destroy, id: 6 }.to change(ModelName, :count)
  end

  it { is_expected.to respond_with :success }
  it { is_expected.to render_template :destroy }
end

我发现在before块内部对变更计数进行测试很尴尬，而且我不需要运行它两次。我希望找到类似这样的语法：

describe 'on DELETE to :destroy' do
  before do
    delete :destroy, id: 6
  end

  it { is_expected.to respond_with :success }
  it { is_expected.to render_template :destroy }
  it { is_expected.to change(ModelName, :count) }
end

然而，第三次测试给出了以下错误：

expected #count to have changed, but was not given a block

Answer 1

正如错误消息所示，您需要传递一个块，例如：

it { is_expected.to change { ModelName.count } }

rspec用于测试更改计数的笨拙语法

1 个答案: