[英]Testing assigns with ActiveModel in Rspec
使用Rspec 3.4,我有一個Message類:
class Message
include ActiveModel::Model
end
以下控制器規格失敗:
context "with invalid params" do
it "assigns a newly created but unsaved message as @message" do
post :create, { message: @invalid_attributes }
expect(assigns(:message)).to be_a_new(Message)
失敗消息是:
Failure/Error: expect(assigns(:message)).to be_a_new(Message)
NoMethodError:
undefined method `new_record?' for #<Message:0x00000006dc8a88>
如此看來rspec調用new_record?
當我調用be_a_new(Message)
,由於我的Message類未從ActiveRecord繼承,因此出現此錯誤。
如何測試assigns(:message)
確實是Message類的新實例?
我嘗試了以下方法:
# this works, but I don't like it
expect(assigns(:message).to_not be(nil)
# these fail because the instances are not equal
expect(assigns(:message).to eq(Message.new)
expect(assigns(:message).to eql(Message.new)
expect(assigns(:message).to eqeul(Message.new)
expect(assigns(:message).to be(Message.new)
那么這是一種卑鄙的方式嗎?
我認為您應該嘗試以下操作:
expect( assigns(:message) ).to be_kind_of Message
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