为什么 Active Storage Validations 和 Shoulda Matchers 测试挂起？

Question

我已经安装了这个 gem 来验证和测试活动存储：

gem 'active_storage_validations'
gem 'shoulda-matchers', '~> 6.0'

# app/models/asset.rb
class Asset < ApplicationRecord
  has_one_attached :portrait

  validates(
    :name,
    presence: true,
    uniqueness: true,
    format: {
      with: /\A[\w\.\-\(\)\+]+\z/s,
      message: 'Only alphanumeric, and _-()+. characters are allowed.' # rubocop:disable Rails/I18nLocaleTexts
    }
  )

  validates(
    :portrait,
    content_type: ['image/png', 'image/jpeg', 'image/svg+xml'],
    dimension: { width: { in: 8..512 }, height: { in: 8..512 } },
    size: { less_than: 250.kilobytes }
  )
end

# spec/models/asset_spec.rb
require 'rails_helper'

RSpec.describe Asset do
  subject(:asset) { build(:asset) }

  it { is_expected.to validate_uniqueness_of :name }
  it { is_expected.to allow_value('123-45+a_').for(:name) }
  it { is_expected.not_to allow_value('123=').for(:name) }

  it { is_expected.to validate_size_of(:portrait).less_than(250.kilobytes) }
end

# spec/support/active_storage.rb required by spec/rails_helper.rb
require 'active_storage_validations/matchers'
require 'ostruct'

RSpec.configure do |config|
  config.include ActiveStorageValidations::Matchers
end

# spec/support/shoulda_matchers.rb required by spec/rails_helper.rb
Shoulda::Matchers.configure do |config|
  config.integrate do |with|
    with.test_framework :rspec
    with.library :rails
  end
end

当我一起运行所有测试时，一切似乎都运行良好，但是当我仅运行模型规格时，它挂起！为什么？！ 😳

$ rspec spec/models
.....

Answer 1

我的答案并不理想，但我找到了解决方法。由于某些神秘的原因，Shoulda Matchers 挂在唯一性验证期望上。

it { is_expected.to validate_uniqueness_of :name }

它还挂有

expect(errors).to be_of_kind(:name, :taken)

。

subject(:asset) { build(:asset) }

it 'validates uniqueness of name' do
  create(:asset, name: asset.name)
  asset.validate
  expect(asset.errors).to be_of_kind(:name, :taken)
end

尽管如此，它不会这样悬挂：

subject(:asset) { build(:asset) }
it 'validates uniqueness of name' do
      create(:asset, name: asset.name)
    asset.validate
  expect(asset.errors.where(:name, :taken)).to be_truthy
end