validation - Rails 4，rspec 3 : model validation test

Question

我有一个 organization具有属性的对象 name, doing_business_as .我需要验证 name与 doing_business_as 不一样.

# app/models/organization.rb
class Organization < ActiveRecord::Base
  validate :name_different_from_doing_business_as

  def name_different_from_doing_business_as
    if name == doing_business_as
      errors.add(:doing_business_as, "cannot be same as organization name")
    end
  end
end

我有一个匹配的 rspec 文件来验证这一点:

# spec/models/organization_spec.rb
require "rails_helper"

describe Organization do
  it "does not allow NAME and DOING_BUSINESS_AS to be the same" do
    organization = build(:organization, name: "same-name", doing_business_as: "same-name")

    expect(organization.errors[:doing_business_as].size).to eq(1)
  end
end

但是，当我运行规范时，它失败了，这就是我得到的:

$ rspec spec/models/organization_spec.rb

Organization
  does not allow NAME and DOING_BUSINESS_AS to be the same (FAILED - 1)

Failures:

  1) Organization validations does not allow NAME and DOING_BUSINESS_AS to be the same
     Failure/Error: expect(organization.errors[:doing_business_as].size).to eq(1)

       expected: 1
            got: 0

       (compared using ==)
     # ./spec/models/organization_spec.rb:113:in `block (3 levels) in <top (required)>'

Finished in 0.79734 seconds (files took 3.09 seconds to load)
10 examples, 1 failure

Failed examples:

rspec ./spec/models/organization_spec.rb:110 # Organization validations does not allow NAME and DOING_BUSINESS_AS to be the same

我期待规范通过并确保两个属性不能相同。在 Rails 控制台中，我可以模仿预期的行为，但我似乎无法让规范成功“失败”。

我还通过 Rails 控制台检查了它是否按预期工作:

$ rails c
> o = Organization.new(name: "same", doing_business_as: "same")
> o.valid?
  => false
> o.errors[:doing_business_as]
  => ["cannot be the same as organization name"]

所以我知道功能在那里，但我无法进行可行的测试......

Answer 1

您需要使用 build 方法而不是 create 方法。

# spec/models/organization_spec.rb
require "rails_helper"

describe Organization do
  it "does not allow NAME and DOING_BUSINESS_AS to be the same" do
    organization = build(:organization, name: "same-name", doing_business_as: "same-name")
    organization.valid?
    expect(organization.errors[:doing_business_as].size).to eq(1)
  end
end

或者

# spec/models/organization_spec.rb
require "rails_helper"

describe Organization do
  it "does not allow NAME and DOING_BUSINESS_AS to be the same" do
    organization = build(:organization, name: "same-name", doing_business_as: "same-name")
    expect(organization).to be_invalid
  end
end