用数据库sqlite3, rails加快测试

ruby 代码

database.yml
test:
  adapter: sqlite3
  database: ":memory:"
environment.rb
config.active_record.schema_format = :ruby
def in_memory_database?
  ENV["RAILS_ENV"] == "test" and
  ActiveRecord::Base.connection.class==ActiveRecord::ConnectionAdapters::SQLiteAdapter and
  Rails::Configuration.new.database_configuration['test']['database'] == ':memory:'
end

if in_memory_database?
  puts "creating sqlite in memory database"
  load "#{RAILS_ROOT}/db/schema.rb" # use db agnostic schema by default
#  ActiveRecord::Migrator.up('db/migrate') # use migrations
end