135 lines
4.6 KiB
Ruby
135 lines
4.6 KiB
Ruby
# frozen_string_literal: true
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require 'spec_helper'
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RSpec.describe Gitlab::Database::SharedModel, feature_category: :database do
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describe 'using an external connection' do
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let!(:original_connection) { described_class.connection }
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let(:new_connection) { double('connection') }
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it 'overrides the connection for the duration of the block', :aggregate_failures do
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expect_original_connection_around do
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described_class.using_connection(new_connection) do
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expect(described_class.connection).to be(new_connection)
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end
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end
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end
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it 'does not affect connections in other threads', :aggregate_failures do
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expect_original_connection_around do
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described_class.using_connection(new_connection) do
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expect(described_class.connection).to be(new_connection)
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Thread.new do
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expect(described_class.connection).not_to be(new_connection)
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end.join
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end
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end
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end
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it 'raises an error if the connection does not include `:gitlab_shared` schema' do
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allow(Gitlab::Database)
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.to receive(:gitlab_schemas_for_connection)
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.with(new_connection)
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.and_return([:gitlab_main])
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expect_original_connection_around do
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expect do
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described_class.using_connection(new_connection) {}
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end.to raise_error(/Cannot set `SharedModel` to connection/)
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end
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end
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context 'when multiple connection overrides are nested', :aggregate_failures do
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let(:second_connection) { double('connection') }
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it 'allows the nesting with the same connection object' do
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expect_original_connection_around do
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described_class.using_connection(new_connection) do
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expect(described_class.connection).to be(new_connection)
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described_class.using_connection(new_connection) do
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expect(described_class.connection).to be(new_connection)
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end
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expect(described_class.connection).to be(new_connection)
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end
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end
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end
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it 'raises an error if the connection is changed' do
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expect_original_connection_around do
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described_class.using_connection(new_connection) do
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expect(described_class.connection).to be(new_connection)
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expect do
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described_class.using_connection(second_connection) {}
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end.to raise_error(/Cannot change connection for Gitlab::Database::SharedModel/)
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expect(described_class.connection).to be(new_connection)
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end
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end
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end
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end
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context 'when the block raises an error', :aggregate_failures do
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it 're-raises the error, removing the overridden connection' do
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expect_original_connection_around do
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expect do
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described_class.using_connection(new_connection) do
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expect(described_class.connection).to be(new_connection)
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raise 'here comes an error!'
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end
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end.to raise_error(RuntimeError, 'here comes an error!')
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end
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end
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end
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end
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describe '#connection_db_config' do
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let!(:original_connection) { shared_model_class.connection }
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let!(:original_connection_db_config) { shared_model_class.connection_db_config }
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let(:shared_model) { shared_model_class.new }
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let(:shared_model_class) do
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Class.new(described_class) do
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self.table_name = 'postgres_async_indexes'
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end
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end
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it 'returns the class connection_db_config' do
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expect(shared_model.connection_db_config).to eq(described_class.connection_db_config)
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end
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context 'when switching the class connection' do
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before do
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skip_if_multiple_databases_not_setup
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end
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let(:new_base_model) { Ci::ApplicationRecord }
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let(:new_connection) { new_base_model.connection }
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it 'returns the db_config of the used connection when using load balancing' do
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expect_original_connection_around do
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described_class.using_connection(new_connection) do
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expect(shared_model.connection_db_config).to eq(new_base_model.connection_db_config)
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end
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end
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# it restores the connection_db_config afterwards
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expect(shared_model.connection_db_config).to eq(original_connection_db_config)
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end
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end
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end
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def expect_original_connection_around
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# For safety, ensure our original connection is distinct from our double
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# This should be the case, but in case of something leaking we should verify
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expect(original_connection).not_to be(new_connection)
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expect(described_class.connection).to be(original_connection)
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yield
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expect(described_class.connection).to be(original_connection)
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end
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end
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