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require 'spec_helper'
describe MergeRequests::MergeRequestDiffCacheService, :use_clean_rails_memory_store_caching do
let(:subject) { described_class.new }
let(:merge_request) { create(:merge_request) }
describe '#execute' do
before do
allow_any_instance_of(Gitlab::Diff::File).to receive(:text?).and_return(true)
allow_any_instance_of(Gitlab::Diff::File).to receive(:diffable?).and_return(true)
end
it 'retrieves the diff files to cache the highlighted result' do
new_diff = merge_request.merge_request_diff
cache_key = new_diff.diffs.cache_key
expect(Rails.cache).to receive(:read).with(cache_key).and_call_original
expect(Rails.cache).to receive(:write).with(cache_key, anything).and_call_original
subject.execute(merge_request, new_diff)
end
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.cache_key
subject.execute(merge_request, old_diff)
new_diff = merge_request.create_merge_request_diff
new_cache_key = new_diff.diffs.cache_key
expect(Rails.cache).to receive(:delete).with(old_cache_key).and_call_original
expect(Rails.cache).to receive(:read).with(new_cache_key).and_call_original
expect(Rails.cache).to receive(:write).with(new_cache_key, anything).and_call_original
subject.execute(merge_request, new_diff)
end
end
end
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