30 lines
972 B
Ruby
30 lines
972 B
Ruby
# frozen_string_literal: true
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require 'spec_helper'
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RSpec.describe Preloaders::MergeRequestDiffPreloader do
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let_it_be(:merge_request_1) { create(:merge_request) }
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let_it_be(:merge_request_2) { create(:merge_request) }
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let_it_be(:merge_request_3) { create(:merge_request_without_merge_request_diff) }
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let(:merge_requests) { [merge_request_1, merge_request_2, merge_request_3] }
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def trigger(merge_requests)
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Array(merge_requests).each(&:merge_request_diff)
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end
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def merge_requests_with_preloaded_diff
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described_class.new(MergeRequest.where(id: merge_requests.map(&:id)).to_a).preload_all
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end
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it 'does not trigger N+1 queries' do
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# warmup
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trigger(merge_requests_with_preloaded_diff)
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first_merge_request = merge_requests_with_preloaded_diff.first
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clean_merge_requests = merge_requests_with_preloaded_diff
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expect { trigger(clean_merge_requests) }.to issue_same_number_of_queries_as { trigger(first_merge_request) }
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end
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end
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