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# frozen_string_literal: true
require 'spec_helper'
RSpec.describe 'Database::MultipleDatabases' do
let(:query) do
<<~SQL
WITH cte AS #{Gitlab::Database::AsWithMaterialized.materialized_if_supported} (SELECT 1) SELECT 1;
SQL
end
it 'preloads database version for ApplicationRecord' do
counts = ActiveRecord::QueryRecorder
.new { ApplicationRecord.connection.execute(query) }
.count
expect(counts).to eq(1)
end
it 'preloads database version for Ci::ApplicationRecord' do
counts = ActiveRecord::QueryRecorder
.new { Ci::ApplicationRecord.connection.execute(query) }
.count
expect(counts).to eq(1)
end
describe '.with_reestablished_active_record_base' do
context 'when doing establish_connection' do
context 'on ActiveRecord::Base' do
it 'raises exception' do
expect { ActiveRecord::Base.establish_connection(:main) }.to raise_error /Cannot re-establish/ # rubocop: disable Database/EstablishConnection
end
context 'when using with_reestablished_active_record_base' do
it 'does not raise exception' do
with_reestablished_active_record_base do
expect { ActiveRecord::Base.establish_connection(:main) }.not_to raise_error # rubocop: disable Database/EstablishConnection
end
end
end
end
context 'on Ci::ApplicationRecord' do
before do
skip_if_multiple_databases_not_setup
end
it 'raises exception' do
expect { Ci::ApplicationRecord.establish_connection(:ci) }.to raise_error /Cannot re-establish/ # rubocop: disable Database/EstablishConnection
end
context 'when using with_reestablished_active_record_base' do
it 'does not raise exception' do
with_reestablished_active_record_base do
expect { Ci::ApplicationRecord.establish_connection(:main) }.not_to raise_error # rubocop: disable Database/EstablishConnection
end
end
end
end
end
context 'when trying to access connection' do
context 'when reconnect is true' do
it 'does not raise exception' do
with_reestablished_active_record_base(reconnect: true) do
expect { ApplicationRecord.connection.execute("SELECT 1") }.not_to raise_error
end
end
end
context 'when reconnect is false' do
it 'does raise exception' do
with_reestablished_active_record_base(reconnect: false) do
expect { ApplicationRecord.connection.execute("SELECT 1") }.to raise_error(ActiveRecord::ConnectionNotEstablished)
end
end
end
end
end
describe '.with_added_ci_connection' do
context 'when only a single database is setup' do
before do
skip_if_multiple_databases_are_setup
end
it 'connects Ci::ApplicationRecord to the main database for the duration of the block', :aggregate_failures do
main_database = current_database(ActiveRecord::Base)
original_database = current_database(Ci::ApplicationRecord)
with_added_ci_connection do
expect(current_database(Ci::ApplicationRecord)).to eq(main_database)
end
expect(current_database(Ci::ApplicationRecord)).to eq(original_database)
end
end
context 'when multiple databases are setup' do
before do
skip_if_multiple_databases_not_setup
end
it 'does not mock the original Ci::ApplicationRecord connection', :aggregate_failures do
original_database = current_database(Ci::ApplicationRecord)
with_added_ci_connection do
expect(current_database(Ci::ApplicationRecord)).to eq(original_database)
end
expect(current_database(Ci::ApplicationRecord)).to eq(original_database)
end
end
def current_database(connection_class)
connection_class.retrieve_connection.execute('select current_database()').first
end
end
end
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