[英]Testing a databaseless Rails 5 application with rspec-rails
我有一個不受任何數據庫支持的 Rails 5.0.1
應用程序。 嘗試編寫控制器測試時,我收到ActiveRecord::ConnectionNotEstablished
異常,即使我已明確配置我的spec/rails_helper.rb
不使用ActiveRecord
並刪除了config/application.rb
對 active_record 的引用。 RSpec 試圖在需要建立數據庫連接的事務中運行此類測試。 我附上堆棧跟蹤以供參考,我使用這個 Github 問題為沒有 db connection 的 rails 項目設置了沒有ActiveRecord
rspec-rails 的RSpec。
失敗:
1) ApplicationController the truth false not equal to true 失敗/錯誤:引發 ConnectionNotEstablished,“找不到 ID #{spec_name} 的連接池。” 除非池
ActiveRecord::ConnectionNotEstablished:
No connection pool with id primary found.
# /home/vagrant/.bundle/easypost_admin/ruby/2.3.0/gems/activerecord-5.0.1/lib/active_record/connection_adapters/abstract/connection_pool.rb:882:in `retrieve_connection'
# /home/vagrant/.bundle/easypost_admin/ruby/2.3.0/gems/activerecord-5.0.1/lib/active_record/connection_handling.rb:128:in `retrieve_connection'
# /home/vagrant/.bundle/easypost_admin/ruby/2.3.0/gems/activerecord-5.0.1/lib/active_record/connection_handling.rb:91:in `connection'
# /home/vagrant/.bundle/easypost_admin/ruby/2.3.0/gems/activerecord-5.0.1/lib/active_record/fixtures.rb:516:in `create_fixtures'
# /home/vagrant/.bundle/easypost_admin/ruby/2.3.0/gems/activerecord-5.0.1/lib/active_record/fixtures.rb:1015:in `load_fixtures'
# /home/vagrant/.bundle/easypost_admin/ruby/2.3.0/gems/activerecord-5.0.1/lib/active_record/fixtures.rb:988:in `setup_fixtures'
# /home/vagrant/.bundle/easypost_admin/ruby/2.3.0/gems/activerecord-5.0.1/lib/active_record/fixtures.rb:852:in `before_setup'
# /home/vagrant/.bundle/easypost_admin/ruby/2.3.0/gems/rspec-rails-3.6.1/lib/rspec/rails/adapters.rb:126:in `block (2 levels) in <module:MinitestLifecycleAdapter>'
# /home/vagrant/.bundle/easypost_admin/ruby/2.3.0/gems/rspec-core-3.6.0/lib/rspec/core/example.rb:447:in `instance_exec'
# /home/vagrant/.bundle/easypost_admin/ruby/2.3.0/gems/rspec-core-3.6.0/lib/rspec/core/example.rb:447:in `instance_exec'
# /home/vagrant/.bundle/easypost_admin/ruby/2.3.0/gems/rspec-core-3.6.0/lib/rspec/core/hooks.rb:375:in `execute_with'
# /home/vagrant/.bundle/easypost_admin/ruby/2.3.0/gems/rspec-core-3.6.0/lib/rspec/core/hooks.rb:606:in `block (2 levels) in run_around_example_hooks_for'
# /home/vagrant/.bundle/easypost_admin/ruby/2.3.0/gems/rspec-core-3.6.0/lib/rspec/core/example.rb:342:in `call'
# /home/vagrant/.bundle/easypost_admin/ruby/2.3.0/gems/rspec-core-3.6.0/lib/rspec/core/hooks.rb:607:in `run_around_example_hooks_for'
# /home/vagrant/.bundle/easypost_admin/ruby/2.3.0/gems/rspec-core-3.6.0/lib/rspec/core/hooks.rb:464:in `run'
# /home/vagrant/.bundle/easypost_admin/ruby/2.3.0/gems/rspec-core-3.6.0/lib/rspec/core/example.rb:457:in `with_around_example_hooks'
# /home/vagrant/.bundle/easypost_admin/ruby/2.3.0/gems/rspec-core-3.6.0/lib/rspec/core/example.rb:500:in `with_around_and_singleton_context_hooks'
# /home/vagrant/.bundle/easypost_admin/ruby/2.3.0/gems/rspec-core-3.6.0/lib/rspec/core/example.rb:251:in `run'
# /home/vagrant/.bundle/easypost_admin/ruby/2.3.0/gems/rspec-core-3.6.0/lib/rspec/core/example_group.rb:627:in `block in run_examples'
# /home/vagrant/.bundle/easypost_admin/ruby/2.3.0/gems/rspec-core-3.6.0/lib/rspec/core/example_group.rb:623:in `map'
# /home/vagrant/.bundle/easypost_admin/ruby/2.3.0/gems/rspec-core-3.6.0/lib/rspec/core/example_group.rb:623:in `run_examples'
# /home/vagrant/.bundle/easypost_admin/ruby/2.3.0/gems/rspec-core-3.6.0/lib/rspec/core/example_group.rb:589:in `run'
# /home/vagrant/.bundle/easypost_admin/ruby/2.3.0/gems/rspec-core-3.6.0/lib/rspec/core/example_group.rb:590:in `block in run'
# /home/vagrant/.bundle/easypost_admin/ruby/2.3.0/gems/rspec-core-3.6.0/lib/rspec/core/example_group.rb:590:in `map'
# /home/vagrant/.bundle/easypost_admin/ruby/2.3.0/gems/rspec-core-3.6.0/lib/rspec/core/example_group.rb:590:in `run'
# /home/vagrant/.bundle/easypost_admin/ruby/2.3.0/gems/rspec-core-3.6.0/lib/rspec/core/runner.rb:118:in `block (3 levels) in run_specs'
# /home/vagrant/.bundle/easypost_admin/ruby/2.3.0/gems/rspec-core-3.6.0/lib/rspec/core/runner.rb:118:in `map'
# /home/vagrant/.bundle/easypost_admin/ruby/2.3.0/gems/rspec-core-3.6.0/lib/rspec/core/runner.rb:118:in `block (2 levels) in run_specs'
# /home/vagrant/.bundle/easypost_admin/ruby/2.3.0/gems/rspec-core-3.6.0/lib/rspec/core/configuration.rb:1894:in `with_suite_hooks'
# /home/vagrant/.bundle/easypost_admin/ruby/2.3.0/gems/rspec-core-3.6.0/lib/rspec/core/runner.rb:113:in `block in run_specs'
# /home/vagrant/.bundle/easypost_admin/ruby/2.3.0/gems/rspec-core-3.6.0/lib/rspec/core/reporter.rb:79:in `report'
# /home/vagrant/.bundle/easypost_admin/ruby/2.3.0/gems/rspec-core-3.6.0/lib/rspec/core/runner.rb:112:in `run_specs'
# /home/vagrant/.bundle/easypost_admin/ruby/2.3.0/gems/rspec-core-3.6.0/lib/rspec/core/runner.rb:87:in `run'
# /home/vagrant/.bundle/easypost_admin/ruby/2.3.0/gems/rspec-core-3.6.0/lib/rspec/core/runner.rb:71:in `run'
# /home/vagrant/.bundle/easypost_admin/ruby/2.3.0/gems/rspec-core-3.6.0/lib/rspec/core/runner.rb:45:in `invoke'
# /home/vagrant/.bundle/easypost_admin/ruby/2.3.0/gems/rspec-core-3.6.0/exe/rspec:4:in `<top (required)>'
# /home/vagrant/.bundle/easypost_admin/ruby/2.3.0/bin/rspec:23:in `load'
# /home/vagrant/.bundle/easypost_admin/ruby/2.3.0/bin/rspec:23:in `<top (required)>'
# /opt/ruby2.3/lib64/ruby/gems/2.3.0/gems/bundler-1.12.5/lib/bundler/cli/exec.rb:63:in `load'
# /opt/ruby2.3/lib64/ruby/gems/2.3.0/gems/bundler-1.12.5/lib/bundler/cli/exec.rb:63:in `kernel_load'
# /opt/ruby2.3/lib64/ruby/gems/2.3.0/gems/bundler-1.12.5/lib/bundler/cli/exec.rb:24:in `run'
# /opt/ruby2.3/lib64/ruby/gems/2.3.0/gems/bundler-1.12.5/lib/bundler/cli.rb:304:in `exec'
# /opt/ruby2.3/lib64/ruby/gems/2.3.0/gems/bundler-1.12.5/lib/bundler/vendor/thor/lib/thor/command.rb:27:in `run'
# /opt/ruby2.3/lib64/ruby/gems/2.3.0/gems/bundler-1.12.5/lib/bundler/vendor/thor/lib/thor/invocation.rb:126:in `invoke_command'
# /opt/ruby2.3/lib64/ruby/gems/2.3.0/gems/bundler-1.12.5/lib/bundler/vendor/thor/lib/thor.rb:359:in `dispatch'
# /opt/ruby2.3/lib64/ruby/gems/2.3.0/gems/bundler-1.12.5/lib/bundler/vendor/thor/lib/thor/base.rb:440:in `start'
# /opt/ruby2.3/lib64/ruby/gems/2.3.0/gems/bundler-1.12.5/lib/bundler/cli.rb:11:in `start'
# /opt/ruby2.3/lib64/ruby/gems/2.3.0/gems/bundler-1.12.5/exe/bundle:27:in `block in <top (required)>'
# /opt/ruby2.3/lib64/ruby/gems/2.3.0/gems/bundler-1.12.5/lib/bundler/friendly_errors.rb:98:in `with_friendly_errors'
# /opt/ruby2.3/lib64/ruby/gems/2.3.0/gems/bundler-1.12.5/exe/bundle:19:in `<top (required)>'
# /vagrant/easypost_admin/vendor/bundle/bundle:23:in `load'
# /vagrant/easypost_admin/vendor/bundle/bundle:23:in `<main>'
#
# Showing full backtrace because every line was filtered out.
# See docs for RSpec::Configuration#backtrace_exclusion_patterns and
# RSpec::Configuration#backtrace_inclusion_patterns for more information.
在 0.0058 秒內完成(加載文件需要 2.29 秒)1 個示例,1 個失敗
失敗的例子:
rspec ./spec/controllers/application_controller_spec.rb:15 # ApplicationController 真假不等於真
更新
rails_help.rb
require 'spec_helper'
ENV['RAILS_ENV'] ||= 'test'
require File.expand_path('../../config/environment', __FILE__)
# Prevent database truncation if the environment is production
abort("The Rails environment is running in production mode!") if Rails.env.production?
require 'rspec/rails'
# Add additional requires below this line. Rails is not loaded until this point!
# Checks for pending migration and applies them before tests are run.
# If you are not using ActiveRecord, you can remove this line.
# ActiveRecord::Migration.maintain_test_schema!
RSpec.configure do |config|
# Remove this line if you're not using ActiveRecord or ActiveRecord fixtures
# config.fixture_path = "#{::Rails.root}/spec/fixtures"
# If you're not using ActiveRecord, or you'd prefer not to run each of your
# examples within a transaction, remove the following line or assign false
# instead of true.
config.use_transactional_fixtures = false
# The different available types are documented in the features, such as in
# https://relishapp.com/rspec/rspec-rails/docs
config.infer_spec_type_from_file_location!
# Filter lines from Rails gems in backtraces.
config.filter_rails_from_backtrace!
end
spec_helper.rb
RSpec.configure do |config|
# rspec-expectations config goes here. You can use an alternate
# assertion/expectation library such as wrong or the stdlib/minitest
# assertions if you prefer.
config.expect_with :rspec do |expectations|
expectations.include_chain_clauses_in_custom_matcher_descriptions = true
end
# rspec-mocks config goes here. You can use an alternate test double
# library (such as bogus or mocha) by changing the `mock_with` option here.
config.mock_with :rspec do |mocks|
# Prevents you from mocking or stubbing a method that does not exist on
# a real object. This is generally recommended, and will default to
# `true` in RSpec 4.
mocks.verify_partial_doubles = true
end
config.shared_context_metadata_behavior = :apply_to_host_groups
end
我在沒有配置數據庫的情況下遇到了與 rails 5.2.0.alpha 應用程序完全相同的問題。 所以我查看了 rspec-rails 代碼,並找出了導致所有麻煩的這一行:
rspec-rails/lib/rspec/rails/fixture_support.rb :
if defined?(ActiveRecord::TestFixtures)
它檢查已加載的 ActiveRecord 常量,該常量實際上已加載。 我也有require 'active_record/railtie'
從config/application.rb
注釋掉。 然后我弄清楚誰需要 ActiveStorage gem (bundle.lock)。 就我而言,它是 ActiveStorage。
我只是在沒有數據庫的情況下使用 ActiveStorage 功能,所以我不得不刪除我的spec/rails_helper.rb
上的 ActiveRecord 常量:
# frozen_string_literal: true
# This file is copied to spec/ when you run 'rails generate rspec:install'
require 'spec_helper'
ENV['RAILS_ENV'] ||= 'test'
require File.expand_path('../../config/environment', __FILE__)
# Remove the ActiveRecord constant, because it is autloaded by
# ActiveStorage and not needed for our application. The presence
# of the ActiveRecord constant causes rspec-rails to include
# extra fixture support, which results in:
#
# ActiveRecord::ConnectionNotEstablished:
# No connection pool with 'primary' found.
#
Object.send(:remove_const, :ActiveRecord)
注意順序,它需要在之后放置
require File.expand_path('../../config/environment', __FILE__)
和之前
require 'rspec/rails'
本方案只是修改了測試環境。
我在 rspec-rails 上創建了一個問題,其目標是創建全局 rspec 配置以關閉 ActiveRecord 處理。
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