received? はdoubleで作ったらstubしないと使えない

やりたいこと

あるメソッドが呼ばれかどうかことをテストしたい

ハマったこと

code:ruby

invitation = double('invitation')

user.accept_invitation(invitation)

expect(invitation).to have_received(:accept)

原因

On a spy objects or as null object doubles this works for any method, on other objects the method must have been stubbed beforehand in order for messages to be verified.

これならOK

code:ruby

invitation = double('invitation')

allow(invitation).to receive(:accept).and_return(true) # stubする

user.accept_invitation(invitation)

expect(invitation).to have_received(:accept)