using Jasmines spyon upon a private method

Question

is it possible to use Jasmine unit testing framework\'s spyon method upon a classes private methods?

The documentation gives this example but can this be flexivble for a

Answer 1

spyOn(fakePerson, 'sayHello');
expect(fakePerson['sayHello']).toHaveBeenCalled();

by adding to spyOn you remove it from typescript type check. you also need to use array index notation in order to access a private method (sayHello) in the test expect