【问题标题】：RSpec/AnyInstance: Avoid stubbing using allow_any_instance_of problemRSpec/AnyInstance：避免使用allow_any_instance_of问题存根
【发布时间】：2018-11-15 13:41:48
【问题描述】：

帮帮我。我不明白如何解决它。我尝试了很多变化...

driver_iq_driver_spec.rb

describe '.perform' do
it 'correctly parse response' do
  driver = described_class.new(dot_application, background_check_type, provider_setting).perform
  expect(driver).to be_instance_of(BackgroundCheck)
  expect(driver).to have_attributes(status: 'inprogress', background_check_type_id: 4)
end

context 'when exception when status is Error' do
  before { allow_any_instance_of(described_class).to receive(:driver_iq_api).and_return('https://test/error') }

  it 'returns error message' do
    expect { described_class.new(dot_application, background_check_type, provider_setting).perform }.
      to raise_error(RuntimeError)
  end
 end
end

错误：RSpec/AnyInstance：避免使用 allow_any_instance_of 存根。在 {allow_any_instance_of( describe_class).to receive(:driver_iq_api).and_return('https://test/error') }
之前

【问题讨论】：

标签： ruby-on-rails ruby rspec

【解决方案1】：

您有一个非常具体的 described_class 实例，您可以存根：

context 'when exception when status is Error' do
  let(:subject) do
    described_class.new(dot_application, background_check_type, provider_setting)
  end
  
  before do
    allow(subject).to receive(:driver_iq_api).and_return('https://test/error')
  end

  it 'returns error message' do
    expect { subject.perform }.to raise_error(RuntimeError)
  end
 end

假设perform 引发错误，而不是初始化实例。

【讨论】：