RSpec before in a helper

Question

Is it possible to do something like this?

module MyHelper
  before (:each) do
    allow(Class).to receive(:method).and_return(true)
  end
end

Then in my tests I could do something like:

RSpec.describe 'My cool test' do
  include MyHelper
  it 'Tests a Class Method' do
    expect { Class.method }.to eq true
  end
end

EDIT: This produces the following error:

undefined method `before' for MyHelper:Module (NoMethodError)

---

Essentially I have a case where many tests do different things, but a common model across off of them reacts on an after_commit which ends up always calling a method which talks to an API. I dont want to GLOBALLY allow Class to receive :method as, sometimes, I need to define it myself for special cases... but I'd like to not have to repeat my allow/receive/and_return and instead wrap it in a common helper...

Answer 1

You can create a hook that is triggered via metadata, for example :type => :api:

RSpec.configure do |c|
  c.before(:each, :type => :api) do
    allow(Class).to receive(:method).and_return(true)
  end
end

And in your spec:

RSpec.describe 'My cool test', :type => :api do
  it 'Tests a Class Method' do
    expect { Class.method }.to eq true
  end
end

You can also pass :type => :api to individual it blocks.

Answer 2

It is possible to do things like you want with feature called shared_context

You could create the shared file with code like this

shared_file.rb

shared_context "stubbing :method on Class" do
  before { allow(Class).to receive(:method).and_return(true) }
end

Then you could include that context in the files you needed in the blocks you wanted like so

your_spec_file.rb

require 'rails_helper'
require 'shared_file'

RSpec.describe 'My cool test' do
  include_context "stubbing :method on Class"
  it 'Tests a Class Method' do
    expect { Class.method }.to eq true
  end
end

And it will be more naturally for RSpec than your included/extended module helpers. It would be "RSpec way" let's say.