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require 'spec_helper'
describe Gitlab::Database::MigrationHelpers, lib: true do
let(:model) do
Class.new do
include Gitlab::Database::MigrationHelpers
def method_missing(name, *args, &block)
ActiveRecord::Base.connection.send(name, *args, &block)
end
end.new
end
describe '#add_concurrent_index' do
context 'outside a transaction' do
before do
expect(model).to receive(:transaction_open?).and_return(false)
end
context 'using PostgreSQL' do
it 'creates the index concurrently' do
expect(Gitlab::Database).to receive(:postgresql?).and_return(true)
expect(model).to receive(:add_index).
with(:users, :foo, algorithm: :concurrently)
model.add_concurrent_index(:users, :foo)
end
end
context 'using MySQL' do
it 'creates a regular index' do
expect(Gitlab::Database).to receive(:postgresql?).and_return(false)
expect(model).to receive(:add_index).
with(:users, :foo)
model.add_concurrent_index(:users, :foo)
end
end
end
context 'inside a transaction' do
it 'raises RuntimeError' do
expect(model).to receive(:transaction_open?).and_return(true)
expect { model.add_concurrent_index(:users, :foo) }.
to raise_error(RuntimeError)
end
end
end
describe '#update_column_in_batches' do
before do
create_list(:empty_project, 5)
end
it 'updates all the rows in a table' do
model.update_column_in_batches(:projects, :import_error, 'foo')
expect(Project.where(import_error: 'foo').count).to eq(5)
end
end
describe '#add_column_with_default' do
context 'outside of a transaction' do
before do
expect(model).to receive(:transaction_open?).and_return(false)
expect(model).to receive(:transaction).twice.and_yield
expect(model).to receive(:add_column).
with(:projects, :foo, :integer, default: nil)
expect(model).to receive(:change_column_default).
with(:projects, :foo, 10)
end
it 'adds the column while allowing NULL values' do
expect(model).to receive(:update_column_in_batches).
with(:projects, :foo, 10)
expect(model).not_to receive(:change_column_null)
model.add_column_with_default(:projects, :foo, :integer,
default: 10,
allow_null: true)
end
it 'adds the column while not allowing NULL values' do
expect(model).to receive(:update_column_in_batches).
with(:projects, :foo, 10)
expect(model).to receive(:change_column_null).
with(:projects, :foo, false)
model.add_column_with_default(:projects, :foo, :integer, default: 10)
end
it 'removes the added column whenever updating the rows fails' do
expect(model).to receive(:update_column_in_batches).
with(:projects, :foo, 10).
and_raise(RuntimeError)
expect(model).to receive(:remove_column).
with(:projects, :foo)
expect do
model.add_column_with_default(:projects, :foo, :integer, default: 10)
end.to raise_error(RuntimeError)
end
end
context 'inside a transaction' do
it 'raises RuntimeError' do
expect(model).to receive(:transaction_open?).and_return(true)
expect do
model.add_column_with_default(:projects, :foo, :integer, default: 10)
end.to raise_error(RuntimeError)
end
end
end
end
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