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# frozen_string_literal: true
require 'spec_helper'
RSpec.describe Gitlab::Diff::FileCollection::PaginatedMergeRequestDiff, feature_category: :code_review_workflow do
let(:merge_request) { create(:merge_request) }
let(:page) { 1 }
let(:per_page) { 10 }
let(:diffable) { merge_request.merge_request_diff }
let(:diff_files_relation) { diffable.merge_request_diff_files }
let(:diff_files) { subject.diff_files }
subject do
described_class.new(diffable,
page,
per_page)
end
describe '#diff_files' do
let(:per_page) { 3 }
let(:paginated_rel) { diff_files_relation.page(page).per(per_page) }
let(:expected_batch_files) do
paginated_rel.map(&:new_path)
end
it 'returns paginated diff files' do
expect(diff_files.size).to eq(3)
end
it 'returns a valid instance of a DiffCollection' do
expect(diff_files).to be_a(Gitlab::Git::DiffCollection)
end
context 'when first page' do
it 'returns correct diff files' do
expect(diff_files.map(&:new_path)).to eq(expected_batch_files)
end
end
context 'when another page' do
let(:page) { 2 }
it 'returns correct diff files' do
expect(diff_files.map(&:new_path)).to eq(expected_batch_files)
end
end
context 'when page is nil' do
let(:page) { nil }
it 'returns correct diff files' do
expected_batch_files =
diff_files_relation.page(described_class::DEFAULT_PAGE).per(per_page).map(&:new_path)
expect(diff_files.map(&:new_path)).to eq(expected_batch_files)
end
end
context 'when per_page is nil' do
let(:per_page) { nil }
it 'returns correct diff files' do
expected_batch_files =
diff_files_relation.page(page).per(described_class::DEFAULT_PER_PAGE).map(&:new_path)
expect(diff_files.map(&:new_path)).to eq(expected_batch_files)
end
end
context 'when invalid page' do
let(:page) { 999 }
it 'returns correct diff files' do
expect(diff_files.map(&:new_path)).to be_empty
end
end
context 'when last page' do
it 'returns correct diff files' do
last_page = diff_files_relation.count - per_page
collection = described_class.new(diffable,
last_page,
per_page)
expected_batch_files = diff_files_relation.page(last_page).per(per_page).map(&:new_path)
expect(collection.diff_files.map(&:new_path)).to eq(expected_batch_files)
end
end
end
it_behaves_like 'unfoldable diff' do
subject do
described_class.new(merge_request.merge_request_diff,
page,
per_page)
end
end
it_behaves_like 'cacheable diff collection' do
let(:cacheable_files_count) { per_page }
end
it_behaves_like 'unsortable diff files' do
let(:diffable) { merge_request.merge_request_diff }
subject do
described_class.new(merge_request.merge_request_diff,
page,
per_page)
end
end
end
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