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# frozen_string_literal: true
require 'spec_helper'
RSpec.describe Gitlab::Database::Migrations::Observers::TransactionDuration do
subject(:transaction_duration_observer) { described_class.new(observation, directory_path) }
let(:observation) { Gitlab::Database::Migrations::Observation.new(migration_version, migration_name) }
let(:directory_path) { Dir.mktmpdir }
let(:log_file) { "#{directory_path}/#{migration_version}_#{migration_name}-transaction-duration.json" }
let(:transaction_duration) { Gitlab::Json.parse(File.read(log_file)) }
let(:migration_version) { 20210422152437 }
let(:migration_name) { 'test' }
after do
FileUtils.remove_entry(directory_path)
end
it 'records real and sub transactions duration', :delete do
observe
entry = transaction_duration[0]
start_time, end_time, transaction_type = entry.values_at('start_time', 'end_time', 'transaction_type')
start_time = DateTime.parse(start_time)
end_time = DateTime.parse(end_time)
aggregate_failures do
expect(transaction_duration.size).to eq(3)
expect(start_time).to be_before(end_time)
expect(transaction_type).not_to be_nil
end
end
context 'when there are sub-transactions' do
it 'records transaction duration' do
observe_sub_transaction
expect(transaction_duration.size).to eq(1)
entry = transaction_duration[0]['transaction_type']
expect(entry).to eql 'sub_transaction'
end
end
context 'when there are real-transactions' do
it 'records transaction duration', :delete do
observe_real_transaction
expect(transaction_duration.size).to eq(1)
entry = transaction_duration[0]['transaction_type']
expect(entry).to eql 'real_transaction'
end
end
private
def observe
transaction_duration_observer.before
run_transaction
transaction_duration_observer.after
transaction_duration_observer.record
end
def observe_sub_transaction
transaction_duration_observer.before
run_sub_transactions
transaction_duration_observer.after
transaction_duration_observer.record
end
def observe_real_transaction
transaction_duration_observer.before
run_real_transactions
transaction_duration_observer.after
transaction_duration_observer.record
end
def run_real_transactions
ActiveRecord::Base.transaction do
end
end
def run_sub_transactions
ActiveRecord::Base.transaction(requires_new: true) do
end
end
def run_transaction
ActiveRecord::Base.connection_pool.with_connection do |connection|
Gitlab::Database::SharedModel.using_connection(connection) do
Gitlab::Database::SharedModel.transaction do
Gitlab::Database::SharedModel.transaction(requires_new: true) do
Gitlab::Database::SharedModel.transaction do
Gitlab::Database::SharedModel.transaction do
Gitlab::Database::SharedModel.transaction(requires_new: true) do
end
end
end
end
end
end
end
end
end
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