Test ActiveModel::Serializer classes with Rspec

Question

Given the following ActiveModel::Serializer class:

class SampleSerializer < ActiveModel::Serializer
  attributes :id, :name
end

Answer 1

Example: You can writing this modern style.

Category serializer:

class CategorySerializer < ActiveModel::Serializer
  attributes :id, :name
end

RSpec:

require 'rails_helper'

RSpec.describe CategorySerializer, type: :serializer do
  let(:category) { FactoryGirl.build(:category) }
  let(:serializer) { described_class.new(category) }
  let(:serialization) { ActiveModelSerializers::Adapter.create(serializer) }

  let(:subject) { JSON.parse(serialization.to_json) }

  it 'has an id that matches' do
    expect(subject['id']).to eql(category.id)
  end

  it 'has a name that matches' do
    expect(subject['name']).to eql(category.name)
  end  
end