Assertion for RSpec that checks if a hash or json object is within another json object

include_json.rb

RSpec::Matchers.define :include_json do |expected_json|
  match do |actual_json|
    expect(hashify(actual_json)).to include(hashify(expected_json))
  end

  def hashify(object)
    return object.stringify_keys if object.class == Hash
    JSON.parse(object)
  end
end

describe ':include_json' do
  context 'subject as json' do
    subject { { 'hello' => 'world', 'foo' => 'bar' }.to_json }

    context 'expectation as hash' do
      it { should include_json({ foo: 'bar', hello: 'world' }) }
      it { should include_json( { hello: 'world' }) }
      it { should_not include_json( { hello: 'world', bar: 'baz' }) }
      it { should_not include_json( { bar: 'baz' }) }
    end
    context 'expectation as json' do
      it { should include_json( { hello: 'world' }.to_json ) }
      it { should include_json( { 'foo' => 'bar', 'hello' => 'world' }.to_json ) }
      it { should_not include_json( { 'XXXX' => 'XXX'}.to_json ) }

    end
  end
  context 'subject as hash' do
    subject { { fizz: [1, 2, 3], buzz: true } }

    context 'expectation as hash' do
      it { should include_json( { fizz: [1, 2, 3], buzz: true } ) }
      it { should include_json( { buzz: true }) }
      it { should_not include_json( { hello: 'world', buzz: true }) }
      it { should_not include_json( { buzz: false }) }
    end

    context 'expectation as json' do
      it { should include_json( { fizz: [1,2,3] }.to_json ) }
      it { should_not include_json( { 'XXXX' => 'XXX'}.to_json ) }
      it { should_not include_json( { fizz: [4,5,6] }.to_json ) }
    end
  end
end