Question

如何在创建记录时测试邮件是否发送到MyCoolClass？

describe MyModel, type: :model do
  it 'should call this class' do
    # how do I set the expectation of new_record_id?
    expect_any_instance_of(MyCoolClass).to receive(:a_method).with(new_record_id, :created)
    MyModel.create
  end
end

唯一的选择是：

describe MyModel, type: :model do
  it 'should call this class' do
    new_record = MyModel.new
    expect_any_instance_of(MyCoolClass).to receive(:a_method).with(new_record, :created)
    new_record.save
  end
end

这里的问题是，我正在测试save，而不是create，这对我的情况大多是好的。但更大的问题是，这意味着我必须更改MyCoolClass的实现以传递记录，而不是id。

Answer 1

我看到两个变种

1）使用anything或kind_of(Numeric)

it 'should call this class' do
  expect_any_instance_of(MyCoolClass).to receive(:a_method).with(kind_of(Numeric), :created)
  MyModel.create
end

2）存根save或create方法并返回double

let(:my_model) { double(id: 123, save: true, ...) }

it 'should call this class' do
  MyModel.stub(:new).and_return(my_model)
  expect_any_instance_of(MyCoolClass).to receive(:a_method).with(my_model.id, :created)
  MyModel.create
end

如何为尚不存在的对象设置RSpec期望

1 个答案: