64 lines
2.0 KiB
Ruby
64 lines
2.0 KiB
Ruby
# frozen_string_literal: true
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require 'spec_helper'
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RSpec.describe Gitlab::Pagination::Keyset::CursorPager do
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let(:relation) { Group.all.order(:name, :id) }
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let(:per_page) { 3 }
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let(:params) { { cursor: nil, per_page: per_page } }
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let(:request_context) { double('request_context', params: params) }
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let(:cursor_based_request_context) { Gitlab::Pagination::Keyset::CursorBasedRequestContext.new(request_context) }
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before_all do
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create_list(:group, 7)
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end
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describe '#paginate' do
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subject(:paginated_result) { described_class.new(cursor_based_request_context).paginate(relation) }
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it 'returns the limited relation' do
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expect(paginated_result).to eq(relation.limit(per_page))
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end
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end
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describe '#finalize' do
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subject(:finalize) do
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service = described_class.new(cursor_based_request_context)
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# we need to do this because `finalize` can only be called
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# after `paginate` is called. Otherwise the `paginator` object won't be set.
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service.paginate(relation)
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service.finalize
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end
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it 'passes information about next page to request' do
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cursor_for_next_page = relation.keyset_paginate(**params).cursor_for_next_page
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expect_next_instance_of(Gitlab::Pagination::Keyset::HeaderBuilder, request_context) do |builder|
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expect(builder).to receive(:add_next_page_header).with({ cursor: cursor_for_next_page })
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end
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finalize
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end
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context 'when retrieving the last page' do
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let(:relation) { Group.where('id > ?', Group.maximum(:id) - per_page).order(:name, :id) }
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it 'does not build information about the next page' do
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expect(Gitlab::Pagination::Keyset::HeaderBuilder).not_to receive(:new)
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finalize
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end
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end
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context 'when retrieving an empty page' do
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let(:relation) { Group.where('id > ?', Group.maximum(:id) + 1).order(:name, :id) }
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it 'does not build information about the next page' do
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expect(Gitlab::Pagination::Keyset::HeaderBuilder).not_to receive(:new)
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finalize
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end
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end
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end
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end
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