RSpec失败/错误：需要File.expand_path（'../ config / environment'，__dir__）

Question

我正在将Rails 6与Grape一起使用，我不知道为什么我的规格无缘无故开始返回此类错误

An error occurred while loading ./spec/controllers/health_check_spec.rb.
Failure/Error: require File.expand_path('../config/environment', __dir__)

ActiveSupport::MessageEncryptor::InvalidMessage:
  ActiveSupport::MessageEncryptor::InvalidMessage

哪个超级奇怪，因为我以前没有这样的问题。我添加了devise和shoulda-matchers gem，但是即使没有这些gem，我也会遇到相同的错误。

spec_helper：

require 'simplecov'
SimpleCov.start

RSpec.configure do |config|
  config.expect_with :rspec do |expectations|
    expectations.include_chain_clauses_in_custom_matcher_descriptions = true
  end

  config.mock_with :rspec do |mocks|
    mocks.verify_partial_doubles = true
  end

  config.default_formatter = 'doc' if config.files_to_run.one?

  config.shared_context_metadata_behavior = :apply_to_host_groups
  config.profile_examples = 10
  config.order = :random

  Kernel.srand config.seed
end

rails_helper：

require 'spec_helper'
ENV['RAILS_ENV'] ||= 'test'
require File.expand_path('../config/environment', __dir__)

abort('The Rails environment is running in production mode!') if Rails.env.production?
require 'rspec/rails'

begin
  ActiveRecord::Migration.maintain_test_schema!
rescue ActiveRecord::PendingMigrationError => e
  puts e.to_s.strip
  exit 1
end

RSpec.configure do |config|
  config.fixture_path = "#{::Rails.root}/spec/fixtures"
  config.use_transactional_fixtures = true
  config.infer_spec_type_from_file_location!

  config.filter_rails_from_backtrace!
end

Shoulda::Matchers.configure do |config|
  config.integrate do |with|
    with.test_framework :rspec
    with.library :rails
  end
end