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|
# frozen_string_literal: true
require 'spec_helper'
RSpec.describe Gitlab::Database::BackgroundMigration::BatchedMigration, type: :model do
it_behaves_like 'having unique enum values'
describe 'associations' do
it { is_expected.to have_many(:batched_jobs).with_foreign_key(:batched_background_migration_id) }
describe '#last_job' do
let!(:batched_migration) { create(:batched_background_migration) }
let!(:batched_job1) { create(:batched_background_migration_job, batched_migration: batched_migration) }
let!(:batched_job2) { create(:batched_background_migration_job, batched_migration: batched_migration) }
it 'returns the most recent (in order of id) batched job' do
expect(batched_migration.last_job).to eq(batched_job2)
end
end
end
describe '.queue_order' do
let!(:migration1) { create(:batched_background_migration) }
let!(:migration2) { create(:batched_background_migration) }
let!(:migration3) { create(:batched_background_migration) }
it 'returns batched migrations ordered by their id' do
expect(described_class.queue_order.all).to eq([migration1, migration2, migration3])
end
end
describe '.active_migration' do
let!(:migration1) { create(:batched_background_migration, :finished) }
let!(:migration2) { create(:batched_background_migration, :active) }
let!(:migration3) { create(:batched_background_migration, :active) }
it 'returns the first active migration according to queue order' do
expect(described_class.active_migration).to eq(migration2)
end
end
describe '#interval_elapsed?' do
context 'when the migration has no last_job' do
let(:batched_migration) { build(:batched_background_migration) }
it 'returns true' do
expect(batched_migration.interval_elapsed?).to eq(true)
end
end
context 'when the migration has a last_job' do
let(:interval) { 2.minutes }
let(:batched_migration) { create(:batched_background_migration, interval: interval) }
context 'when the last_job is less than an interval old' do
it 'returns false' do
freeze_time do
create(:batched_background_migration_job,
batched_migration: batched_migration,
created_at: Time.current - 1.minute)
expect(batched_migration.interval_elapsed?).to eq(false)
end
end
end
context 'when the last_job is exactly an interval old' do
it 'returns true' do
freeze_time do
create(:batched_background_migration_job,
batched_migration: batched_migration,
created_at: Time.current - 2.minutes)
expect(batched_migration.interval_elapsed?).to eq(true)
end
end
end
context 'when the last_job is more than an interval old' do
it 'returns true' do
freeze_time do
create(:batched_background_migration_job,
batched_migration: batched_migration,
created_at: Time.current - 3.minutes)
expect(batched_migration.interval_elapsed?).to eq(true)
end
end
end
context 'when an interval variance is given' do
let(:variance) { 2.seconds }
context 'when the last job is less than an interval with variance old' do
it 'returns false' do
freeze_time do
create(:batched_background_migration_job,
batched_migration: batched_migration,
created_at: Time.current - 1.minute - 57.seconds)
expect(batched_migration.interval_elapsed?(variance: variance)).to eq(false)
end
end
end
context 'when the last job is more than an interval with variance old' do
it 'returns true' do
freeze_time do
create(:batched_background_migration_job,
batched_migration: batched_migration,
created_at: Time.current - 1.minute - 58.seconds)
expect(batched_migration.interval_elapsed?(variance: variance)).to eq(true)
end
end
end
end
end
end
describe '#create_batched_job!' do
let(:batched_migration) do
create(:batched_background_migration,
batch_size: 999,
sub_batch_size: 99,
pause_ms: 250
)
end
it 'creates a batched_job with the correct batch configuration' do
batched_job = batched_migration.create_batched_job!(1, 5)
expect(batched_job).to have_attributes(
min_value: 1,
max_value: 5,
batch_size: batched_migration.batch_size,
sub_batch_size: batched_migration.sub_batch_size,
pause_ms: 250
)
end
end
describe '#next_min_value' do
let!(:batched_migration) { create(:batched_background_migration) }
context 'when a previous job exists' do
let!(:batched_job) { create(:batched_background_migration_job, batched_migration: batched_migration) }
it 'returns the next value after the previous maximum' do
expect(batched_migration.next_min_value).to eq(batched_job.max_value + 1)
end
end
context 'when a previous job does not exist' do
it 'returns the migration minimum value' do
expect(batched_migration.next_min_value).to eq(batched_migration.min_value)
end
end
end
describe '#job_class' do
let(:job_class) { Gitlab::BackgroundMigration::CopyColumnUsingBackgroundMigrationJob }
let(:batched_migration) { build(:batched_background_migration) }
it 'returns the class of the job for the migration' do
expect(batched_migration.job_class).to eq(job_class)
end
end
describe '#batch_class' do
let(:batch_class) { Gitlab::BackgroundMigration::BatchingStrategies::PrimaryKeyBatchingStrategy}
let(:batched_migration) { build(:batched_background_migration) }
it 'returns the class of the batch strategy for the migration' do
expect(batched_migration.batch_class).to eq(batch_class)
end
end
shared_examples_for 'an attr_writer that demodulizes assigned class names' do |attribute_name|
let(:batched_migration) { build(:batched_background_migration) }
context 'when a module name exists' do
it 'removes the module name' do
batched_migration.public_send(:"#{attribute_name}=", '::Foo::Bar')
expect(batched_migration[attribute_name]).to eq('Bar')
end
end
context 'when a module name does not exist' do
it 'does not change the given class name' do
batched_migration.public_send(:"#{attribute_name}=", 'Bar')
expect(batched_migration[attribute_name]).to eq('Bar')
end
end
end
describe '#job_class_name=' do
it_behaves_like 'an attr_writer that demodulizes assigned class names', :job_class_name
end
describe '#batch_class_name=' do
it_behaves_like 'an attr_writer that demodulizes assigned class names', :batch_class_name
end
describe '#migrated_tuple_count' do
subject { batched_migration.migrated_tuple_count }
let(:batched_migration) { create(:batched_background_migration) }
before do
create_list(:batched_background_migration_job, 5, status: :succeeded, batch_size: 1_000, batched_migration: batched_migration)
create_list(:batched_background_migration_job, 1, status: :running, batch_size: 1_000, batched_migration: batched_migration)
create_list(:batched_background_migration_job, 1, status: :failed, batch_size: 1_000, batched_migration: batched_migration)
end
it 'sums the batch_size of succeeded jobs' do
expect(subject).to eq(5_000)
end
end
describe '#prometheus_labels' do
let(:batched_migration) { create(:batched_background_migration, job_class_name: 'TestMigration', table_name: 'foo', column_name: 'bar') }
it 'returns a hash with labels for the migration' do
labels = {
migration_id: batched_migration.id,
migration_identifier: 'TestMigration/foo.bar'
}
expect(batched_migration.prometheus_labels).to eq(labels)
end
end
describe '#smoothed_time_efficiency' do
let(:migration) { create(:batched_background_migration, interval: 120.seconds) }
let(:end_time) { Time.zone.now }
around do |example|
freeze_time do
example.run
end
end
let(:common_attrs) do
{
status: :succeeded,
batched_migration: migration,
finished_at: end_time
}
end
context 'when there are not enough jobs' do
subject { migration.smoothed_time_efficiency(number_of_jobs: 10) }
it 'returns nil' do
create_list(:batched_background_migration_job, 9, **common_attrs)
expect(subject).to be_nil
end
end
context 'when there are enough jobs' do
subject { migration.smoothed_time_efficiency(number_of_jobs: number_of_jobs) }
let!(:jobs) { create_list(:batched_background_migration_job, number_of_jobs, **common_attrs.merge(batched_migration: migration)) }
let(:number_of_jobs) { 10 }
before do
expect(migration).to receive_message_chain(:batched_jobs, :successful_in_execution_order, :reverse_order, :limit).with(no_args).with(no_args).with(number_of_jobs).and_return(jobs)
end
def mock_efficiencies(*effs)
effs.each_with_index do |eff, i|
expect(jobs[i]).to receive(:time_efficiency).and_return(eff)
end
end
context 'example 1: increasing trend, but only recently crossed threshold' do
it 'returns the smoothed time efficiency' do
mock_efficiencies(1.1, 1, 0.95, 0.9, 0.8, 0.95, 0.9, 0.8, 0.9, 0.95)
expect(subject).to be_within(0.05).of(0.95)
end
end
context 'example 2: increasing trend, crossed threshold a while ago' do
it 'returns the smoothed time efficiency' do
mock_efficiencies(1.2, 1.1, 1, 1, 1.1, 1, 0.95, 0.9, 0.95, 0.9)
expect(subject).to be_within(0.05).of(1.1)
end
end
context 'example 3: decreasing trend, but only recently crossed threshold' do
it 'returns the smoothed time efficiency' do
mock_efficiencies(0.9, 0.95, 1, 1.2, 1.1, 1.2, 1.1, 1.0, 1.1, 1.0)
expect(subject).to be_within(0.05).of(1.0)
end
end
context 'example 4: latest run spiked' do
it 'returns the smoothed time efficiency' do
mock_efficiencies(1.2, 0.9, 0.8, 0.9, 0.95, 0.9, 0.92, 0.9, 0.95, 0.9)
expect(subject).to be_within(0.02).of(0.96)
end
end
end
end
describe '#optimize!' do
subject { batched_migration.optimize! }
let(:batched_migration) { create(:batched_background_migration) }
let(:optimizer) { instance_double('Gitlab::Database::BackgroundMigration::BatchOptimizer') }
it 'calls the BatchOptimizer' do
expect(Gitlab::Database::BackgroundMigration::BatchOptimizer).to receive(:new).with(batched_migration).and_return(optimizer)
expect(optimizer).to receive(:optimize!)
subject
end
end
end
|