98 lines
2.9 KiB
Ruby
98 lines
2.9 KiB
Ruby
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# frozen_string_literal: true
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require 'spec_helper'
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describe API::Helpers::PaginationStrategies do
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subject { Class.new.include(described_class).new }
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let(:expected_result) { double("result") }
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let(:relation) { double("relation") }
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let(:params) { {} }
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before do
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allow(subject).to receive(:params).and_return(params)
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end
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describe '#paginate_with_strategies' do
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let(:paginator) { double("paginator", paginate: expected_result, finalize: nil) }
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before do
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allow(subject).to receive(:paginator).with(relation).and_return(paginator)
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end
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it 'yields paginated relation' do
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expect { |b| subject.paginate_with_strategies(relation, &b) }.to yield_with_args(expected_result)
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end
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it 'calls #finalize with first value returned from block' do
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return_value = double
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expect(paginator).to receive(:finalize).with(return_value)
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subject.paginate_with_strategies(relation) do |records|
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some_options = {}
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[return_value, some_options]
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end
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end
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it 'returns whatever the block returns' do
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return_value = [double, double]
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result = subject.paginate_with_strategies(relation) do |records|
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return_value
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end
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expect(result).to eq(return_value)
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end
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end
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describe '#paginator' do
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context 'offset pagination' do
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let(:paginator) { double("paginator") }
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before do
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allow(subject).to receive(:keyset_pagination_enabled?).and_return(false)
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end
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it 'delegates to OffsetPagination' do
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expect(Gitlab::Pagination::OffsetPagination).to receive(:new).with(subject).and_return(paginator)
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expect(subject.paginator(relation)).to eq(paginator)
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end
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end
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context 'for keyset pagination' do
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let(:params) { { pagination: 'keyset' } }
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let(:request_context) { double('request context') }
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let(:pager) { double('pager') }
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before do
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allow(subject).to receive(:keyset_pagination_enabled?).and_return(true)
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allow(Gitlab::Pagination::Keyset::RequestContext).to receive(:new).with(subject).and_return(request_context)
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end
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context 'when keyset pagination is available' do
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before do
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allow(Gitlab::Pagination::Keyset).to receive(:available?).and_return(true)
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allow(Gitlab::Pagination::Keyset::Pager).to receive(:new).with(request_context).and_return(pager)
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end
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it 'delegates to Pager' do
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expect(subject.paginator(relation)).to eq(pager)
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end
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end
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context 'when keyset pagination is not available' do
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before do
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allow(Gitlab::Pagination::Keyset).to receive(:available?).with(request_context, relation).and_return(false)
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end
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it 'renders a 501 error' do
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expect(subject).to receive(:error!).with(/not yet available/, 405)
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subject.paginator(relation)
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end
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end
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end
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end
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end
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