簡單的rspec模型測試無法測試是否設置了屬性

Question

我對Rails比較陌生，我不確定為什么rspec測試失敗。

模型類

class Invitation < ActiveRecord::Base
  belongs_to :sender, :class_name => "User"

  before_create :generate_token

  private 
  def generate_token
    self.token = Digest::SHA1.hexdigest([Time.now, rand].join)
  end
end

測試

  it "should create a hash for the token" do
    invitation = Invitation.new
    Digest::SHA1.stub(:hexdigest).and_return("some random hash")
    invitation.token.should == "some random hash"
  end

錯誤：

Failure/Error: invitation.token.should == "some random hash"
       expected: "some random hash"
            got: nil (using ==)

邀請模型具有token：string屬性。 有任何想法嗎？ 謝謝！

Answer 1

在save新對象之前， before_create運行。 Invitation.new所做的全部都是實例化一個新的邀請對象。 您需要在調用new之后保存或只創建邀請對象。

Digest::SHA1.stub(:hexdigest).and_return("some random hash")
invitation = Invitation.new
invitation.save
invitation.token.should == "some random hash"

要么

Digest::SHA1.stub(:hexdigest).and_return("some random hash")
invitation = Invitation.create
invitation.token.should == "some random hash"