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

Let say sayHello(text: string) is a private method. You can use the following code:

// Create a spy on it using "any"
spyOn<any>(fakePerson, 'sayHello').and.callThrough();

// To access the private (or protected) method use [ ] operator:
expect(fakeperson['sayHello']).toHaveBeenCalledWith('your-params-to-sayhello');

• Create a spy on private method using any.
• To access the private (or protected) method use [] operator.

Answer 2

Just add a generic parameter < any> to the spyon() function:

 spyOn<any>(fakePerson, 'sayHello');

It works on perfectly !

Answer 3

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

by adding <any> 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