gistfile1.rb

  def test_does_not_delete_association_if_it_was_removed
    author_address = AuthorAddress.first
    author = author_address.author
    author.author_address_id = nil

    assert author.save

    author.destroy

    assert AuthorAddress.find(author_address.id)
    assert_raise(ActiveRecord::RecordNotFound) { Author.find(author.id) }
  end

  def test_does_not_delete_association_if_it_was_removed_on_has_many
    firm = Firm.first
    client = firm.clients.build :name => "Dharma Initiative"

    assert client.save

    client.firm_id = nil
    assert client.save

    assert Firm.find(firm.id)

    same_client = Client.find(client.id)
    assert_nil same_client.firm
  end