require 'spec_helper' describe BitbucketServer::Paginator do let(:last_page) { double(:page, next?: false, items: ['item_2']) } let(:first_page) { double(:page, next?: true, next: last_page, items: ['item_1']) } let(:connection) { instance_double(BitbucketServer::Connection) } describe '#items' do let(:paginator) { described_class.new(connection, 'http://more-data', :pull_request) } let(:page_attrs) { { 'isLastPage' => false, 'nextPageStart' => 1 } } it 'returns items and raises StopIteration in the end' do allow(paginator).to receive(:fetch_next_page).and_return(first_page) expect(paginator.items).to match(['item_1']) allow(paginator).to receive(:fetch_next_page).and_return(last_page) expect(paginator.items).to match(['item_2']) allow(paginator).to receive(:fetch_next_page).and_return(nil) expect { paginator.items }.to raise_error(StopIteration) end it 'obeys limits' do limited = described_class.new(connection, 'http://more-data', :pull_request, page_offset: 0, limit: 1) allow(limited).to receive(:fetch_next_page).and_return(first_page) expect(limited.has_next_page?).to be_truthy expect(limited.items).to match(['item_1']) expect(limited.has_next_page?).to be_truthy expect { limited.items }.to raise_error(StopIteration) end it 'does not stop if limit is unspecified' do stub_const("BitbucketServer::Paginator::PAGE_LENGTH", 1) paginator = described_class.new(connection, 'http://more-data', :pull_request, page_offset: 0, limit: nil) allow(paginator).to receive(:fetch_next_page).and_return(first_page, last_page) expect(paginator.has_next_page?).to be_truthy expect(paginator.items).to match(['item_1']) expect(paginator.has_next_page?).to be_truthy expect(paginator.items).to match(['item_2']) end it 'calls the connection with different offsets' do expect(connection).to receive(:get).with('http://more-data', start: 0, limit: BitbucketServer::Paginator::PAGE_LENGTH).and_return(page_attrs) expect(paginator.items).to eq([]) expect(connection).to receive(:get).with('http://more-data', start: 1, limit: BitbucketServer::Paginator::PAGE_LENGTH).and_return({}) expect(paginator.items).to eq([]) expect { paginator.items }.to raise_error(StopIteration) end end end