invitation_spec.rb

require "rails_helper"

RSpec.describe Invitation do
  context "with a new object" do
    it "should create a new instance given a valid attribute" do
      invitation = Invitation.create!(
        :sender_id => 1,
        :recipient_email => "abc@example.com",
        :token => "knjg1h2uye47fuygdwbfhshijdsap90afs9u8y7",
        :sent_at => Time.now
      )

      expect(invitation).to be_valid
    end
  end
end

#### OUTPUT #####
# 20) Invitation with a new object should create a new instance given a valid attribute
#      Failure/Error: invitation = Invitation.create!(
#      ActiveRecord::RecordInvalid:
#        Validation failed: Recipient email can't be blank
#      # ./spec/models/invitation_spec.rb:6:in `block (3 levels) in <top (required)>'