debian-mirror-gitlab/spec/lib/gitlab/database/migrations/instrumentation_spec.rb

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2021-03-11 19:13:27 +05:30
# frozen_string_literal: true
require 'spec_helper'
RSpec.describe Gitlab::Database::Migrations::Instrumentation do
describe '#observe' do
subject { described_class.new }
let(:migration) { 1234 }
it 'executes the given block' do
expect { |b| subject.observe(migration, &b) }.to yield_control
end
context 'behavior with observers' do
subject { described_class.new(observers).observe(migration) {} }
let(:observers) { [observer] }
let(:observer) { instance_double('Gitlab::Database::Migrations::Observers::MigrationObserver', before: nil, after: nil, record: nil) }
it 'calls #before, #after, #record on given observers' do
expect(observer).to receive(:before).ordered
expect(observer).to receive(:after).ordered
expect(observer).to receive(:record).ordered do |observation|
expect(observation.migration).to eq(migration)
end
subject
end
it 'ignores errors coming from observers #before' do
expect(observer).to receive(:before).and_raise('some error')
subject
end
it 'ignores errors coming from observers #after' do
expect(observer).to receive(:after).and_raise('some error')
subject
end
it 'ignores errors coming from observers #record' do
expect(observer).to receive(:record).and_raise('some error')
subject
end
end
context 'on successful execution' do
subject { described_class.new.observe(migration) {} }
it 'records walltime' do
expect(subject.walltime).not_to be_nil
end
it 'records success' do
expect(subject.success).to be_truthy
end
it 'records the migration version' do
expect(subject.migration).to eq(migration)
end
end
context 'upon failure' do
subject { described_class.new.observe(migration) { raise 'something went wrong' } }
it 'raises the exception' do
expect { subject }.to raise_error(/something went wrong/)
end
context 'retrieving observations' do
subject { instance.observations.first }
before do
instance.observe(migration) { raise 'something went wrong' }
rescue
# ignore
end
let(:instance) { described_class.new }
it 'records walltime' do
expect(subject.walltime).not_to be_nil
end
it 'records failure' do
expect(subject.success).to be_falsey
end
it 'records the migration version' do
expect(subject.migration).to eq(migration)
end
end
end
context 'sequence of migrations with failures' do
subject { described_class.new }
let(:migration1) { double('migration1', call: nil) }
let(:migration2) { double('migration2', call: nil) }
it 'records observations for all migrations' do
subject.observe('migration1') {}
subject.observe('migration2') { raise 'something went wrong' } rescue nil
expect(subject.observations.size).to eq(2)
end
end
end
end