ruby-on-rails-3 - 期望 raise_error 并且测试失败，因为它会引发此错误

Question

我有简单的测试用例：

it "is removed when associated board is deleted" do
  link = FactoryGirl.create(:link)
  link.board.destroy
  expect(Link.find(link.id)).to raise_error ActiveRecord::RecordNotFound
end

它失败并输出：

1) Link is removed when associated board is deleted
   Failure/Error: expect(Link.find(link.id)).to raise_error ActiveRecord::RecordNotFound
   ActiveRecord::RecordNotFound:
     Couldn't find Link with id=1
   # ./spec/models/link_spec.rb:47:in `block (2 levels) in <top (required)>'

知道为什么吗？

Answer 1

要捕获错误，您需要将代码包装在一个块中。您的代码正在Link.find(link.id)预期错误的范围内执行。适当的测试：

it "is removed when associated board is deleted" do
  link = FactoryGirl.create(:link)
  link.board.destroy
  expect { Link.find(link.id) }.to raise_error ActiveRecord::RecordNotFound
end