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# frozen_string_literal: true
require 'spec_helper'
describe MergeRequests::ReloadDiffsService, :use_clean_rails_memory_store_caching do
let(:current_user) { create(:user) }
let(:merge_request) { create(:merge_request) }
let(:subject) { described_class.new(merge_request, current_user) }
describe '#execute' do
it 'creates new merge request diff' do
expect { subject.execute }.to change { merge_request.merge_request_diffs.count }.by(1)
end
it 'calls update_diff_discussion_positions with correct params' do
old_diff_refs = merge_request.diff_refs
new_diff = merge_request.create_merge_request_diff
new_diff_refs = merge_request.diff_refs
expect(merge_request).to receive(:create_merge_request_diff).and_return(new_diff)
expect(merge_request).to receive(:update_diff_discussion_positions)
.with(old_diff_refs: old_diff_refs,
new_diff_refs: new_diff_refs,
current_user: current_user)
subject.execute
end
it 'does not change existing merge request diff' do
expect(merge_request.merge_request_diff).not_to receive(:save_git_content)
subject.execute
end
context 'cache clearing' do
it 'clears the cache for older diffs on the merge request' do
old_diff = merge_request.merge_request_diff
old_cache_key = old_diff.diffs_collection.cache_key
expect(Rails.cache).to receive(:delete).with(old_cache_key).and_call_original
subject.execute
end
it 'avoids N+1 queries', :request_store do
current_user
merge_request
control_count = ActiveRecord::QueryRecorder.new do
subject.execute
end.count
expect { subject.execute }.not_to exceed_query_limit(control_count)
end
end
end
end