Standard RSpec tests for models

The create_bank method looks like this:

   def create_bank( options = {})
    Bank.create({
        :person_id     => 1,
        :sort_code     => ‘989898’,
        :name          => ‘Natlays Shanghai’,
        :branch        => ‘Fruit Exchange’,
        :address       => ‘Big Street’,
        :tow          => ‘Tow’,
        :county        => ‘Place’,
        :postcode      => ‘L1 5XX’,
        :account       => ‘123456789’,
      }.merge(options))
  end

RSpec tests look a bit like this 

  it “should be valid” do
    lambda {
      create_bank.should be_valid
    }.should change(Bank,:count).by(1)
  end

  it “should have a sort code” do
    lambda {
     bank = create_bank(:sort_code => nil)
     bank.should have_at_least(1).errors_on(:sort_code)
    }.should_not change(Bank,:count)
  end

  it “should belong to a perso” do
    Bank.reflect_on_association(:person).should_not be_nil
  end

 Testing that destroy is cascaded down to child records (Employer can have many addresses):

  it “should delete addresses” do
    address = Address.new
    employer = create_employer
    employer.addresses « address
    address.should_receive(:destroy).once
    employer.destroy
  end