Rspec - 存根模块方法

Question

How can I stub a method within a module:

module SomeModule
    def method_one
        # do stuff
        something = method_two(some_arg)
        # so more stuff
    end

    def method_two(arg)
        # do stuff
    end
end

I can test method_two in isolation fine.

I would like to test method_one in isolation too by stubbing the return value of method_two :

shared_examples_for SomeModule do
    it 'does something exciting' do
        # neither of the below work
        # SomeModule.should_receive(:method_two).and_return('MANUAL')
        # SomeModule.stub(:method_two).and_return('MANUAL')

        # expect(described_class.new.method_one).to eq(some_value)
    end
end

describe SomeController do
    include_examples SomeModule
end

The specs in SomeModule that are included in SomeController fail because method_two throws an exception (it tries to do a db lookup that has not been seeded).

How can I stub method_two when it is called within method_one ?

Answer 1

shared_examples_for SomeModule do
  let(:instance) { described_class.new }

  it 'does something exciting' do
    instance.should_receive(:method_two).and_return('MANUAL')
    expect(instance.method_one).to eq(some_value)
  end
end

describe SomeController do
  include_examples SomeModule
end

Answer 2

allow_any_instance_of(M).to receive(:foo).and_return(:bar)

Is there a way to stub a method of an included module with Rspec?

This approach works for me