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require 'spec_helper'
describe Gitlab::BackgroundMigration::DeleteDiffFiles, :migration, schema: 20180619121030 do
describe '#perform' do
context 'when diff files can be deleted' do
let(:merge_request) { create(:merge_request, :merged) }
let!(:merge_request_diff) do
merge_request.create_merge_request_diff
merge_request.merge_request_diffs.first
end
let(:perform) do
described_class.new.perform(MergeRequestDiff.pluck(:id))
end
it 'deletes all merge request diff files' do
expect { perform }
.to change { merge_request_diff.merge_request_diff_files.count }
.from(20).to(0)
end
it 'updates state to without_files' do
expect { perform }
.to change { merge_request_diff.reload.state }
.from('collected').to('without_files')
end
it 'rollsback if something goes wrong' do
expect(described_class::MergeRequestDiffFile).to receive_message_chain(:where, :delete_all)
.and_raise
expect { perform }
.to raise_error
merge_request_diff.reload
expect(merge_request_diff.state).to eq('collected')
expect(merge_request_diff.merge_request_diff_files.count).to eq(20)
end
end
it 'reschedules itself when should_wait_deadtuple_vacuum' do
merge_request = create(:merge_request, :merged)
first_diff = merge_request.merge_request_diff
second_diff = merge_request.create_merge_request_diff
Sidekiq::Testing.fake! do
worker = described_class.new
allow(worker).to receive(:should_wait_deadtuple_vacuum?) { true }
worker.perform([first_diff.id, second_diff.id])
expect(described_class.name.demodulize).to be_scheduled_delayed_migration(5.minutes, [first_diff.id, second_diff.id])
expect(BackgroundMigrationWorker.jobs.size).to eq(1)
end
end
end
describe '#should_wait_deadtuple_vacuum?' do
it 'returns true when hitting merge_request_diff_files hits DEAD_TUPLES_THRESHOLD', :postgresql do
worker = described_class.new
threshold_query_result = [{ "n_dead_tup" => described_class::DEAD_TUPLES_THRESHOLD.to_s }]
normal_query_result = [{ "n_dead_tup" => '3' }]
allow(worker)
.to receive(:execute_statement)
.with(/SELECT n_dead_tup */)
.and_return(threshold_query_result, normal_query_result)
expect(worker.should_wait_deadtuple_vacuum?).to be(true)
end
end
end
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