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# frozen_string_literal: true
require 'spec_helper'
RSpec.describe Gitlab::Database::AsyncIndexes::IndexCreator do
describe '#perform' do
subject { described_class.new(async_index) }
let(:async_index) { create(:postgres_async_index) }
let(:index_model) { Gitlab::Database::AsyncIndexes::PostgresAsyncIndex }
let(:connection) { ApplicationRecord.connection }
context 'when the index already exists' do
before do
connection.execute(async_index.definition)
end
it 'skips index creation' do
expect(connection).not_to receive(:execute).with(/CREATE INDEX/)
subject.perform
end
end
it 'creates the index while controlling statement timeout' do
allow(connection).to receive(:execute).and_call_original
expect(connection).to receive(:execute).with("SET statement_timeout TO '32400s'").ordered.and_call_original
expect(connection).to receive(:execute).with(async_index.definition).ordered.and_call_original
expect(connection).to receive(:execute).with("RESET statement_timeout").ordered.and_call_original
subject.perform
end
it 'removes the index preparation record from postgres_async_indexes' do
expect(async_index).to receive(:destroy).and_call_original
expect { subject.perform }.to change { index_model.count }.by(-1)
end
it 'skips logic if not able to acquire exclusive lease' do
expect(subject).to receive(:try_obtain_lease).and_return(false)
expect(connection).not_to receive(:execute).with(/CREATE INDEX/)
expect(async_index).not_to receive(:destroy)
expect { subject.perform }.not_to change { index_model.count }
end
end
end
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