gitlab-org--gitlab-foss/spec/lib/gitlab/serializer/pagination_spec.rb

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require 'spec_helper'
describe Gitlab::Serializer::Pagination do
let(:request) { spy('request') }
let(:response) { spy('response') }
let(:headers) { spy('headers') }
before do
allow(request).to receive(:query_parameters)
.and_return(params)
allow(response).to receive(:headers)
.and_return(headers)
end
let(:pagination) { described_class.new(request, response) }
describe '#paginate' do
subject { pagination.paginate(resource) }
let(:resource) { User.all }
let(:params) { { page: 1, per_page: 2 } }
context 'when a multiple resources are present in relation' do
before do
create_list(:user, 3)
end
it 'correctly paginates the resource' do
expect(subject.count).to be 2
end
it 'appends relevant headers' do
expect(headers).to receive(:[]=).with('X-Total', '3')
expect(headers).to receive(:[]=).with('X-Total-Pages', '2')
expect(headers).to receive(:[]=).with('X-Per-Page', '2')
subject
end
end
context 'when an invalid resource is about to be paginated' do
let(:resource) { create(:user) }
it 'raises error' do
expect { subject }.to raise_error(
described_class::InvalidResourceError)
end
end
end
end