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# frozen_string_literal: true
RSpec.shared_examples 'a where_composite scope' do |scope_name|
let(:result) { described_class.public_send(scope_name, ids) }
context 'we pass an empty array' do
let(:ids) { [] }
it 'returns a null relation' do
expect(result).to be_empty
end
end
context 'we pass nil' do
let(:ids) { nil }
it 'returns a null relation' do
expect(result).to be_empty
end
end
context 'we pass a singleton composite id' do
let(:ids) { composite_ids.first }
it 'finds the first result' do
expect(result).to contain_exactly(first_result)
end
end
context 'we pass group of ids' do
let(:ids) { composite_ids }
it 'finds all the results' do
expect(result).to contain_exactly(*all_results)
end
end
describe 'performance' do
it 'is not O(N)' do
all_ids = composite_ids
one_id = composite_ids.first
expect { described_class.public_send(scope_name, all_ids) }
.to issue_same_number_of_queries_as { described_class.public_send(scope_name, one_id) }
end
end
end
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