CODEWITHSUNDEEP
ruby-on-railsrubyrspec
Abeid Ahmed
Abeid Ahmed

Reputation: 355

RSpec test if method is being called inside a method

So, I have the following lines of code that I want to mock test with RSpec.

class BaseService
  MAX_BODY_SIZE = 100000.freeze

  def translate(body, language, account)
    return body if body.blank?

    translate_body_in_chunks(body, language, account) if body.size > MAX_BODY_SIZE
  end

  def translate_body_in_chunks(body, language, account)
    # some API call that I don't want to call while testing
  end
end

I want to test if translate_body_in_chunks is being called or not.

RSpec implementation so far

body = 'a' * 10000000
mock = double(described_class)
allow(mock).to receive(:translate).with(body, 'en', '')

expect(mock).to receive(:translate_body_in_chunks)

I know this test won't work. I just added it here to give you a hint on what I want to test.

Upvotes: 0

Views: 150

Answers (1)

Stefan
Stefan

Reputation: 114138

Something like this should work:

describe BaseService do
  describe '#translate' do
    context 'with a body exceeding MAX_BODY_SIZE' do
      let(:body) { 'a' * (BaseService::MAX_BODY_SIZE + 1) }

      it 'calls translate_body_in_chunks' do
        expect(subject).to receive(:translate_body_in_chunks)

        subject.translate(body, 'en', '')
      end
    end
  end
end

subject refers to an instance created via BaseService.new.

Note that in general, you shouldn't test your method's implementation details. Instead, try to test the method's behavior.

Upvotes: 1

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