ActiveResource::HttpMock::Flow

Adds dynamic mocks to ActiveResource::HttpMock.

The default implementation of ActiveResource::HttpMock is not able to test code that has this kind of work flow:

class Charge < ActiveResource::Base; end

def charge_customer
  count = Charge.all.count

  Charge.create(amount: 10.00)

  fail 'could not charge customer' unless Charge.all.count == count + 1
end

ActiveResource::HttpMock::Flow can test the above like so:

def setup
  @charges = []

  ActiveResource::HttpMock.respond_to do |mock|
    mock.get '/charges.json' do |request, response|
      response.body = {charges: @charges}.to_json
    end

    mock.post '/charges.json' do |request, response|
      @charges << [{id: @charges.length + 1}]
    end
  end
end

def test_customers_are_charged
  assert_equal 0, Charge.all.count

  charge_customer

  assert_equal 1, Charge.all.count
end

It also allows you to check if a request was actually made, and to inspect it:

def setup
  ActiveResource::HttpMock.respond_to do |mock|
    mock.post '/charges.json' do |request, _|
      @request = request
    end
  end
end

def test_customers_are_charged
  charge_customer

  refute_nil @request

  json = ActiveSupport::JSON.decode(@request.body)
  charge = json['charge']

  assert_equal 10.00, charge['amount']
end

Installation

Update your Gemfile to the following:

group :test do
  gem 'activeresource-httpmock-flow'
end

And then execute:

$ bundle

Usage

Require the library in your test helper:

require 'activeresource/http_mock/flow'

And use ActiveResource::HttpMock as you would normally. It is compatible with the default implementation as well.

Development

After checking out the repo, run bin/setup to install dependencies. Then, run rake test to run the tests. You can also run bin/console for an interactive prompt that will allow you to experiment.

To install the development version onto your local machine, run bundle exec rake install.

Contributing

Bug reports and pull requests are welcome on GitHub at https://github.com/hi5dev/activeresource-httpmock-flow.

License

The gem is available as open source under the terms of the MIT License.