aaa

let(:my_handler) { MyClassInitialization.new(some params) }
subject { my_handler.call }

shared_examples_for 'returns proper error message' do
  expect(subject.status).to be_falsey
  expect(subject.code).to equal(204)
  expect(subject.payload).not_to be_empty
end

context 'invalid data' do
  it_behaves_like 'returns proper error message'
end