Improving software delivery in every organisation

Triangulation

Given a method f which has the production code as follows:

def eat_cake(cake)
  unwrap(cake)
  eat(cake)
end

When TDDing you need at least 2 tests to be confident that your method hasn’t been slimed. With only 1 test you can pass the test by hard coding the tested value. E.g.

def test_eating_cake_eats_carrot_cake
  eat_cake(:carrot_cake)
  expect(eat).called_with :carrot_cake
end

def eat_cake(cake)
  eat(:carrot_cake)
end

Marking scheme

  • Can describe the situations where using triangulation helps improve test quality.
  • Can demonstrate examples of where they have used triangulation.
  • Can demonstrate triangulation when TDDing an example piece of code.

How effective is your business at software delivery?

Answer these 20 questions and find out where the principal software delivery challenges lie within your organisation.

Get started now