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# frozen_string_literal: true
require 'spec_helper'
describe Gitlab::Pagination::Keyset do
describe '.paginate' do
subject { described_class.paginate(request_context, relation) }
let(:request_context) { double }
let(:relation) { double }
let(:pager) { double }
let(:result) { double }
it 'uses Pager to paginate the relation' do
expect(Gitlab::Pagination::Keyset::Pager).to receive(:new).with(request_context).and_return(pager)
expect(pager).to receive(:paginate).with(relation).and_return(result)
expect(subject).to eq(result)
end
end
describe '.available?' do
subject { described_class }
let(:request_context) { double("request context", page: page)}
let(:page) { double("page", order_by: order_by) }
shared_examples_for 'keyset pagination is available' do
it 'returns true for Project' do
expect(subject.available?(request_context, Project.all)).to be_truthy
end
it 'return false for other types of relations' do
expect(subject.available?(request_context, User.all)).to be_falsey
end
end
context 'with order-by id asc' do
let(:order_by) { { id: :asc } }
it_behaves_like 'keyset pagination is available'
end
context 'with order-by id desc' do
let(:order_by) { { id: :desc } }
it_behaves_like 'keyset pagination is available'
end
context 'with other order-by columns' do
let(:order_by) { { created_at: :desc, id: :desc } }
it 'returns false for Project' do
expect(subject.available?(request_context, Project.all)).to be_falsey
end
it 'return false for other types of relations' do
expect(subject.available?(request_context, User.all)).to be_falsey
end
end
end
end
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