由于对Github 问题的评论将我发送到此博客条目及其示例spec/spec_helper.rb ，我设法获得了一个可以正确执行 SimpleCov的有效spec/spec_helper.rb配置。这个工作的所有原因都包含在（非常详细！）博客条目中。替换为您的应用程序的名称。$ rspec spec/SampleApp
规范/spec_helper.rb
require 'rubygems'
require 'spork'
Spork.prefork do
unless ENV['DRB']
require 'simplecov'
SimpleCov.start 'rails'
end
require 'rails/application'
require Rails.root.join("config/application")
ENV["RAILS_ENV"] ||= 'test'
require 'rspec/rails'
require 'rspec/autorun'
RSpec.configure do |config|
config.mock_with :rspec
config.fixture_path = "#{::Rails.root}/spec/fixtures"
config.use_transactional_fixtures = false
config.before :each do
if Capybara.current_driver == :rack_test
DatabaseCleaner.strategy = :transaction
else
DatabaseCleaner.strategy = :truncation
end
DatabaseCleaner.start
end
config.after do
DatabaseCleaner.clean
end
config.infer_base_class_for_anonymous_controllers = false
end
end
Spork.each_run do
if ENV['DRB']
require 'simplecov'
SimpleCov.start 'rails'
SampleApp::Application.initialize!
class SampleApp::Application
def initialize!; end
end
end
Dir[Rails.root.join("spec/support/**/*.rb")].each {|f| require f}
end
编辑
如果您使用Travis-CI，请不要按原样使用此代码，因为您可能会收到undefined method 'root' for Rails:Module (NoMethodError)错误。如果您知道如何解决此问题，请分享。
编辑 2
我通过基本上将所有东西都放在Spork.each_run块中来让 Travis CI 工作，这似乎显着减慢了测试速度。必须有更好的方法来做到这一点，或者为了不必运行$ rspec --no-drb spec/一次即可获得 SimpleCov 报告，这似乎不值得......
规范/spec_helper.rb
require 'rubygems'
require 'spork'
Spork.prefork do
unless ENV['DRB']
require 'simplecov'
SimpleCov.start 'rails'
end
require 'rails/application'
ENV["RAILS_ENV"] ||= 'test'
end
Spork.each_run do
if ENV['DRB']
require 'simplecov'
SimpleCov.start 'rails'
require Rails.root.join("config/application")
SampleApp::Application.initialize!
class SampleApp::Application
def initialize!; end
end
end
unless ENV['DRB']
require File.expand_path("../../config/environment", __FILE__)
end
require 'rspec/rails'
require 'rspec/autorun'
Dir[Rails.root.join("spec/support/**/*.rb")].each {|f| require f}
RSpec.configure do |config|
config.mock_with :rspec
config.fixture_path = "#{::Rails.root}/spec/fixtures"
config.use_transactional_fixtures = false
config.before :each do
if Capybara.current_driver == :rack_test
DatabaseCleaner.strategy = :transaction
else
DatabaseCleaner.strategy = :truncation
end
DatabaseCleaner.start
end
config.after do
DatabaseCleaner.clean
end
config.infer_base_class_for_anonymous_controllers = false
end
end
编辑 3
在使用这个配置几天后，它似乎并没有像我以前想象的那样减慢速度，所以除非发布更优雅的答案，否则我会认为这是公认的答案。
编辑 4
使用这个配置几个月后，我开始意识到它比我想象的要慢。部分原因是意识到 Spork 似乎可以减慢测试套件的速度，并且最适合快速迭代集中测试，而不是始终使用它运行整个测试套件。以下 SO 问题和博客文章将我带到了下面的spec_helper.rb文件，它可以在有或没有 Spork 的情况下运行 SimpleCov，运行速度比以前更快，并且可以与 Capybara 2.0 一起使用。
规范/spec_helper.rb
require 'rubygems'
require 'spork'
require 'simplecov'
#uncomment the following line to use spork with the debugger
#require 'spork/ext/ruby-debug'
Spork.prefork do
ENV["RAILS_ENV"] ||= 'test'
unless ENV['DRB']
SimpleCov.start 'rails'
require File.expand_path("../../config/environment", __FILE__)
end
require 'rspec/rails'
require 'rspec/autorun'
require 'capybara/rails'
require 'capybara/rspec'
# files to preload based on results of Kernel override code below
# ie they took more than 100 ms to load
require "sprockets"
require "sprockets/eco_template"
require "sprockets/base"
require "active_record/connection_adapters/postgresql_adapter"
require "tzinfo"
require "tilt"
require "journey"
require "journey/router"
require "haml/template"
RSpec.configure do |config|
config.mock_with :rspec
# 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
# If true, the base class of anonymous controllers will be inferred
# automatically. This will be the default behavior in future versions of
# rspec-rails.
config.infer_base_class_for_anonymous_controllers = false
config.include FactoryGirl::Syntax::Methods
config.before :suite do
# PerfTools::CpuProfiler.start("/tmp/rspec_profile")
DatabaseCleaner.strategy = :transaction
DatabaseCleaner.clean_with(:truncation)
end
# Request specs cannot use a transaction because Capybara runs in a
# separate thread with a different database connection.
config.before type: :request do
DatabaseCleaner.strategy = :truncation
end
# Reset so other non-request specs don't have to deal with slow truncation.
config.after type: :request do
DatabaseCleaner.strategy = :transaction
end
RESERVED_IVARS = %w(@loaded_fixtures)
last_gc_run = Time.now
config.before(:each) do
GC.disable
end
config.before do
DatabaseCleaner.start
end
config.after do
DatabaseCleaner.clean
end
# Release instance variables and trigger garbage collection
# manually every second to make tests faster
# http://blog.carbonfive.com/2011/02/02/crank-your-specs/
config.after(:each) do
(instance_variables - RESERVED_IVARS).each do |ivar|
instance_variable_set(ivar, nil)
end
if Time.now - last_gc_run > 1.0
GC.enable
GC.start
last_gc_run = Time.now
end
end
config.after :suite do
# PerfTools::CpuProfiler.stop
# REPL to query ObjectSpace
# http://blog.carbonfive.com/2011/02/02/crank-your-specs/
# while true
# '> '.display
# begin
# puts eval($stdin.gets)
# rescue Exception => e
# puts e.message
# end
# end
end
end
# Find files to put into preload
# http://www.opinionatedprogrammer.com/2011/02/profiling-spork-for-faster-start-up-time/
# module Kernel
# def require_with_trace(*args)
# start = Time.now.to_f
# @indent ||= 0
# @indent += 2
# require_without_trace(*args)
# @indent -= 2
# Kernel::puts "#{' '*@indent}#{((Time.now.to_f - start)*1000).to_i} #{args[0]}"
# end
# alias_method_chain :require, :trace
# end
end
Spork.each_run do
# This code will be run each time you run your specs.
if ENV['DRB']
SimpleCov.start 'rails'
SampleApp::Application.initialize!
class SampleApp::Application
def initialize!; end
end
end
# Requires supporting ruby files with custom matchers and macros, etc,
# in spec/support/ and its subdirectories.
Dir[Rails.root.join("spec/support/**/*.rb")].each {|f| require f}
FactoryGirl.reload
I18n.backend.reload!
end