Making Mocking Easier

[acbart]

Playing around with Jest, I was delighted with how easy it was to mock out a class and spy on it.

const logSpy = jest.spyOn(global.console, 'log');
someComplexFunction();
expect(logSpy).toHaveBeenCalled();
expect(logSpy).toHaveBeenCalledTimes(2);
expect(logSpy).toHaveBeenCalledWith('some important message');
expect(logSpy.mock.calls).toContainEqual(['some other message']);
logSpy.mockRestore();

I think we should adopt some similar syntax for Pedal, to quickly build up mock functions, classes, methods, and modules. Currently, you have to define new types (types/library/), the Sandbox mocked module, and extensions.

Make this better.