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# frozen_string_literal: true
require 'spec_helper'
RSpec.describe Backup::DatabaseConnection, :reestablished_active_record_base, feature_category: :backup_restore do
let(:connection_name) { 'main' }
let(:snapshot_id_pattern) { /[A-Z0-9]{8}-[A-Z0-9]{8}-[0-9]/ }
subject(:backup_connection) { described_class.new(connection_name) }
describe '#initialize' do
it 'initializes database_configuration with the provided connection_name' do
expect(Backup::DatabaseConfiguration).to receive(:new).with(connection_name).and_call_original
backup_connection
end
end
describe '#connection_name' do
it 'returns the same connection name used during initialization' do
expect(backup_connection.connection_name).to eq(connection_name)
end
end
describe '#connection' do
it 'is an instance of a ActiveRecord::Base.connection' do
backup_connection.connection.is_a? Gitlab::Database::LoadBalancing::ConnectionProxy
end
end
describe '#database_configuration' do
it 'returns database configuration' do
expect(backup_connection.database_configuration).to be_a(Backup::DatabaseConfiguration)
end
end
describe '#snapshot_id' do
it "returns nil when snapshot has not been triggered" do
expect(backup_connection.snapshot_id).to be_nil
end
context 'when a snapshot transaction is open', :delete do
let!(:snapshot_id) { backup_connection.export_snapshot! }
it 'returns the snapshot_id in the expected format' do
expect(backup_connection.snapshot_id).to match(snapshot_id_pattern)
end
it 'returns the snapshot_id equal to the one returned by #export_snapshot!' do
expect(backup_connection.snapshot_id).to eq(snapshot_id)
end
it "returns nil after a snapshot is released" do
backup_connection.release_snapshot!
expect(backup_connection.snapshot_id).to be_nil
end
end
end
describe '#export_snapshot!', :delete do
it 'returns a snapshot_id in the expected format' do
expect(backup_connection.export_snapshot!).to match(snapshot_id_pattern)
end
it 'opens a transaction with correct isolation format and triggers a snapshot generation' do
expect(backup_connection.connection).to receive(:begin_transaction).with(
isolation: :repeatable_read
).and_call_original
expect(backup_connection.connection).to receive(:select_value).with(
"SELECT pg_export_snapshot()"
).and_call_original
backup_connection.export_snapshot!
end
it 'disables transaction time out' do
expect_next_instance_of(Gitlab::Database::TransactionTimeoutSettings) do |transaction_settings|
expect(transaction_settings).to receive(:disable_timeouts).and_call_original
end
backup_connection.export_snapshot!
end
end
describe '#release_snapshot!', :delete do
it 'clears out existing snapshot_id' do
snapshot_id = backup_connection.export_snapshot!
expect { backup_connection.release_snapshot! }.to change { backup_connection.snapshot_id }
.from(snapshot_id).to(nil)
end
it 'executes a transaction rollback' do
backup_connection.export_snapshot!
expect(backup_connection.connection).to receive(:rollback_transaction).and_call_original
backup_connection.release_snapshot!
end
end
end
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