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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
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