CODEWITHSUNDEEP
ruby-on-railsjsonrspec
user2200234
user2200234

Reputation:

RSpec Rails Serializer JSON

I am trying write a simple Rspec for a serializer that I have in my rails application. I tried using:

ActiveModelSerializer::Matchers. Since this did not work. I did try to make my Rspec test for this look like the following: 

require 'spec_helper'

describe CoffeeTypeSerializer do

  it { should have_key(:name) }
  it { should have_key(:image) }
  it { should have_key(:type_of_coffee) }
  it { should have_key(:temp) }
  it { should have_key(:caffeinated) }
  it { should have_key(:basicInfo) }
  it { should have_key(:price) }
  it { should have_key(:created_at) }
  it { should have_key(:updated_at) }
  it { should have_key(:fullInfo) }
  it { should have_key(:drinks) }
end

Unfortunately had no luck with this and got the following error:

ArgumentError: wrong number of arguments (0 for 1..2)

Tried searching high and low, but what is the best way to test JSON serializers

Upvotes: 0

Views: 1464

Answers (1)

Gavin Miller
Gavin Miller

Reputation: 43825

We've gone and basically rolled our own matchers because the JSON serializers weren't working for us either. They're a bit involved, so I've added them to a gist: https://gist.github.com/gavingmiller/e03ff13edfeef8d5c08d

The example tests end up looking like this:

require 'spec_helper'

describe FeedSerializer, type: :serializer do
  it { should have_attribute(:id) }
  it { should have_attribute(:name) }
  it { should have_many_relation(:feed_filters) }
end

When we make modifications to the serializers (ie: different output than just straight attributes) our tests look like this:

it "successfully parses JSON as an additional field" do
  @data = '{ "key": "value" }'
  json = FooBarSerializer.new(data).as_json
  json[:foo][:bar]['key'].should == 'value'
end

Upvotes: 2

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