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

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# frozen_string_literal: true
require 'spec_helper'
RSpec.describe Gitlab::Database::Migrations::Instrumentation do
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let(:result_dir) { Dir.mktmpdir }
after do
FileUtils.rm_rf(result_dir)
end
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describe '#observe' do
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subject { described_class.new(result_dir: result_dir) }
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let(:migration_name) { 'test' }
let(:migration_version) { '12345' }
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it 'executes the given block' do
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expect { |b| subject.observe(version: migration_version, name: migration_name, &b) }.to yield_control
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end
context 'behavior with observers' do
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subject { described_class.new(observer_classes: [Gitlab::Database::Migrations::Observers::MigrationObserver], result_dir: result_dir).observe(version: migration_version, name: migration_name) {} }
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let(:observer) { instance_double('Gitlab::Database::Migrations::Observers::MigrationObserver', before: nil, after: nil, record: nil) }
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before do
allow(Gitlab::Database::Migrations::Observers::MigrationObserver).to receive(:new).and_return(observer)
end
it 'instantiates observer with observation' do
expect(Gitlab::Database::Migrations::Observers::MigrationObserver)
.to receive(:new)
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.with(instance_of(Gitlab::Database::Migrations::Observation), anything) { |observation| expect(observation.version).to eq(migration_version) }
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.and_return(observer)
subject
end
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it 'calls #before, #after, #record on given observers' do
expect(observer).to receive(:before).ordered
expect(observer).to receive(:after).ordered
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expect(observer).to receive(:record).ordered
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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
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subject { described_class.new(result_dir: result_dir).observe(version: migration_version, name: migration_name) {} }
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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
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expect(subject.version).to eq(migration_version)
end
it 'records the migration name' do
expect(subject.name).to eq(migration_name)
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end
end
context 'upon failure' do
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subject { described_class.new(result_dir: result_dir).observe(version: migration_version, name: migration_name) { raise 'something went wrong' } }
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it 'raises the exception' do
expect { subject }.to raise_error(/something went wrong/)
end
context 'retrieving observations' do
subject { instance.observations.first }
before do
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instance.observe(version: migration_version, name: migration_name) { raise 'something went wrong' }
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rescue StandardError
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# ignore
end
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let(:instance) { described_class.new(result_dir: result_dir) }
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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
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expect(subject.version).to eq(migration_version)
end
it 'records the migration name' do
expect(subject.name).to eq(migration_name)
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end
end
end
context 'sequence of migrations with failures' do
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subject { described_class.new(result_dir: result_dir) }
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let(:migration1) { double('migration1', call: nil) }
let(:migration2) { double('migration2', call: nil) }
it 'records observations for all migrations' do
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subject.observe(version: migration_version, name: migration_name) {}
subject.observe(version: migration_version, name: migration_name) { raise 'something went wrong' } rescue nil
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expect(subject.observations.size).to eq(2)
end
end
end
end