56 lines
1.7 KiB
Ruby
56 lines
1.7 KiB
Ruby
# frozen_string_literal: true
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require 'spec_helper'
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RSpec.describe Gitlab::MultiCollectionPaginator do
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subject(:paginator) { described_class.new(Project.all.order(:id), Group.all.order(:id), per_page: 3) }
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it 'raises an error for invalid page size' do
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expect { described_class.new(Project.all.order(:id), Group.all.order(:id), per_page: 0) }
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.to raise_error(ArgumentError)
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expect { described_class.new(Project.all.order(:id), Group.all.order(:id), per_page: -1) }
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.to raise_error(ArgumentError)
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end
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it 'combines both collections' do
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project = create(:project)
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group = create(:group)
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expect(paginator.paginate(1)).to eq([project, group])
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end
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it 'includes elements second collection if first collection is empty' do
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group = create(:group)
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expect(paginator.paginate(1)).to eq([group])
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end
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context 'with a full first page' do
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let!(:all_groups) { create_list(:group, 4) }
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let!(:all_projects) { create_list(:project, 4) }
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it 'knows the total count of the collection' do
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expect(paginator.total_count).to eq(8)
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end
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it 'fills the first page with elements of the first collection' do
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expect(paginator.paginate(1)).to eq(all_projects.take(3))
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end
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it 'fils the second page with a mixture of the first & second collection' do
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first_collection_element = all_projects.last
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second_collection_elements = all_groups.take(2)
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expected_collection = [first_collection_element] + second_collection_elements
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expect(paginator.paginate(2)).to eq(expected_collection)
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end
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it 'fils the last page with elements from the second collection' do
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expected_collection = all_groups[-2..]
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expect(paginator.paginate(3)).to eq(expected_collection)
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end
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end
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end
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