```ruby
# Configure Rails Envinronment
ENV["RAILS_ENV"] = "test"

require File.expand_path("../dummy/config/environment.rb",  __FILE__)
require "rails/test_help"

ActionMailer::Base.delivery_method = :test
ActionMailer::Base.perform_deliveries = true
ActionMailer::Base.default_url_options[:host] = "test.com"

Rails.backtrace_cleaner.remove_silencers!

# Run any available migration
ActiveRecord::Migrator.migrate File.expand_path("../dummy/db/migrate/", __FILE__)

# Load support files
Dir["#{File.dirname(__FILE__)}/support/**/*.rb"].each { |f| require f }

# For generators
require "rails/generators/test_case"
require "generators/sunrise/scaffold/manage_generator"

# Clear temp folder
require 'fileutils'
FileUtils.rm_r File.expand_path("../tmp", __FILE__), :force => true
```

Clear tmp folder before run test
user
```ruby
# Configure Rails Envinronment
ENV["RAILS_ENV"] = "test"

# Clear tmp folder
require "fileutils"
FileUtils.rm_r "#{File.dirname(__FILE__)}/test/tmp", :force => true 

require File.expand_path("../dummy/config/environment.rb",  __FILE__)
require "rails/test_help"

ActionMailer::Base.delivery_method = :test
ActionMailer::Base.perform_deliveries = true
ActionMailer::Base.default_url_options[:host] = "test.com"

Rails.backtrace_cleaner.remove_silencers!

# Run any available migration
ActiveRecord::Migrator.migrate File.expand_path("../dummy/db/migrate/", __FILE__)

# Load support files
Dir["#{File.dirname(__FILE__)}/support/**/*.rb"].each { |f| require f }

# For generators
require "rails/generators/test_case"
require "generators/sunrise/scaffold/manage_generator"

# Clear temp folder
require 'fileutils'
FileUtils.rm_r File.expand_path("../tmp", __FILE__), :force => true
```
assistant