Question

我的模型中有两个共享相同验证的属性

validates :first_name, :last_name, length: {minimum: 2}

现在我测试:first_name属性如下：

RSpec.describe User, :type => :model do
  it 'is invalid if the first name is less than two characters'
    user = User.create(
      first_name: 'a'
    )
  expect(user).to have(1).errors_on(:first_name)
end

为了不熟悉我如何设置模型的开发人员，我想明确说明这两个属性＆＃39;与这样的事情的关系：

it 'is invalid if the first name and/or last name has less than two characters'
  user = User.create(
    first_name: 'a',
    last_name: 'b
  )
  expect(user).to have(1).errors_on(:first_name, :last_name)

显然这会引发错误：

错误的参数数量（2为0..1）

如果我进行了两次验证，那么同样适用：

validates :first_name, :last_name, length: {minimum: 2}, format: {with: /^([^\d\W]|[-])*$/}

尝试测试2个错误：

it 'is invalid if the first name and/or last name has less than two characters and has special characters'
  user = User.create(
    first_name: '@',
    last_name: '#
  )
  expect(user).to have(2).errors_on(:first_name, :last_name)

Answer 1

在RSpec 3.x中，您可以将期望与.and：

结合起来

it 'is invalid if the first name and/or last name has less than two characters' do
  user = User.create(first_name: 'a', last_name: 'b')
  expect(user).to have(1).errors_on(:first_name).and have(1).errors_on(:last_name)
end

查看rspec-expectations文档了解详情。

对于RSpec 2.x，您需要执行以下操作之一：

it 'is invalid if the first name and/or last name has less than two characters' do
  user = User.create(first_name: 'a', last_name: 'b')
  expect(user).to have(1).errors_on(:first_name) && have(1).errors_on(:last_name)
end

# or
it 'is invalid if the first name and/or last name has less than two characters' do
  user = User.create(first_name: 'a', last_name: 'b')
  expect(user).to have(1).errors_on(:first_name)
  expect(user).to have(1).errors_on(:last_name)
end

它不是很漂亮，但应该有用。

修改

OP正在使用rspec-collection_matchers gem。该gem的自定义匹配器不包含RSpec 3 mixin模块RSpec::Matchers::Composable，因此#and方法无法识别。

要绕过这个问题，有几件事要做。最简单的方法是使用上面的&&技术（在我的RSpec 2.x建议中）。要使用仅 RSpec 3匹配器，您需要使用be_valid：

it 'is invalid if the first name and/or last name has less than two characters' do user = User.create(first_name: 'a', last_name: 'b') expect(user).to_not be_valid end

当然，这并不像原先预期的那样区分first_name错误和last_name错误。要使用be_valid匹配器执行此操作，您必须将测试分为两个测试：

it 'is invalid if the first name has less than two characters' do user = User.create(first_name: 'a', last_name: 'abc') expect(user).to_not be_valid end it 'is invalid if the last name has less than two characters' do user = User.create(first_name: 'abc', last_name: 'a') expect(user).to_not be_valid end

Answer 2

您的测试应如下所示：

it 'invalid length' do
  user = User.new(first_name: '@', last_name: '#')
  user.valid?
  expect(user.errors.count).to eq 2
  expect(user.errors[:first_name]).to include "is too short (minimum is 2 characters)"
  expect(user.errors[:last_name]).to include "is too short (minimum is 2 characters)"
end

user.valid?调用将针对将填充错误的验证运行新用户。

进行单元测试这是一个非常详细的测试 - 我强烈推荐shoulda matchers。您只需两行即可测试上述内容：

it { is_expected.to ensure_length_of(:first_name).is_at_least(2) }
it { is_expected.to ensure_length_of(:last_name).is_at_least(2) }

RSpec - 测试共享相同验证的2个属性的错误

2 个答案: