Optional method parameters are no matched with anything()

[Necroskillz]

I have a small issue where setups are only match to exact number of parameters. So if there are optional parameters the setup is no matched and I need to create additional setups for each parameter count. It would be nice to have anything match an unspecified parameter, or have some other way to specify that it's optional (so you can have optional string, optional number etc).

class A {
    method(a: string, b?: string) {
        return a + b;
    }
}

describe('test', () => {
    let a: A;

    beforeEach(() => {
        a = mock(A);

        when(a.method(anything(), anything())).thenReturn('a');
        // when(a.method(anything())).thenReturn('a'); <-- this would be needed
    });

    it('should work', () => {
        expect(instance(a).method('x', 'y')).toBe('a'); // ok
        expect(instance(a).method('x')).toBe('a'); // null
    });
});

[PhakornKiong]

Just ran into this as well

[fabiosangregorio]

+1, any updates on this?