Function fn
- fn(...stubs): Function
Parameters
Rest...stubs: Function[]Functions to be used as stubs for different calls.
Returns Function
A mock function that keeps track of calls and returns values based on the provided stubs.
Example: Usage
import { fn, expect } from "@std/expect";
Deno.test("example", () => {
const mockFn = fn(
(a: number, b: number) => a + b,
(a: number, b: number) => a - b
);
const result = mockFn(1, 2);
expect(result).toEqual(3);
expect(mockFn).toHaveBeenCalledWith(1, 2);
expect(mockFn).toHaveBeenCalledTimes(1);
const result2 = mockFn(3, 2);
expect(result2).toEqual(1);
expect(mockFn).toHaveBeenCalledWith(3, 2);
expect(mockFn).toHaveBeenCalledTimes(2);
});
Creates a mock function that can be used for testing and assertions.