expected #count to have changed by 1, but was not given a block

Question

I am testing my model method which returns me an Account object. I am checking whether my table has inserted a new row and my Model reflects its count.

Below is my spec.

 it "can create an account" do    
    create_account = Account.create(account: acc) 
    create_account.should change(Account, :count).by(1);
 end

Error i am getting

8) Account can create an account
     Failure/Error: create_account.should change(Account, :count).by(1);
       expected #count to have changed by 1, but was not given a block

Answer 1

The #change matcher expects a block in which some action is performed that effects the expected change. Try this:

expect { Account.create(account: acc) }.to change{ Account.count }.by(1)

See https://www.relishapp.com/rspec/rspec-expectations/v/2-0/docs/matchers/expect-change