Reactjs Jest react native，期望常数为[Function BezierEasing]

我在react native中有一个常数，它设置了一定的贝塞尔松弛

const easeInQuad = Easing.bezier(0.55, 0.085, 0.68, 0.53);

和相关的玩笑测试

test("Animation/easeInQuad should return correct value", () => {
  expect(easeInQuad).toBe("[Function BezierEasing]");
});

它目前的产出如下：

动画/easeInQuad应返回正确的值

expect(received).toBe(expected) // Object.is equality

Expected value to be:
  "[Function BezierEasing]"
Received:
  [Function BezierEasing]

Difference:

  Comparing two different types of values. Expected string but received function.

---

我需要传递给

expect

什么才能匹配正在输出的内容？

您可以使用

函数。name

检查名称，例如

expect(easeInQuad.name).toBe("BezierEasing");

可能还需要先检查它是否是函数：

expect(easeInQuad).toBeInstanceOf(Function);