blob: a5622510e3a60df275c75594d5cd003fa13e2d17 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
|
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at <http://mozilla.org/MPL/2.0/>. */
import { memoizeLast } from "../memoizeLast";
const a = { number: 3 };
const b = { number: 4 };
function add(...numberObjects) {
return numberObjects.reduce((prev, cur) => prev + cur.number, 0);
}
describe("memozie", () => {
it("should re-calculate when a value changes", () => {
const mAdd = memoizeLast(add);
mAdd(a);
expect(mAdd(a)).toEqual(3);
mAdd(b);
expect(mAdd(b)).toEqual(4);
});
it("should only run once", () => {
const mockAdd = jest.fn(add);
const mAdd = memoizeLast(mockAdd);
mAdd(a);
mAdd(a);
expect(mockAdd.mock.calls[0]).toEqual([{ number: 3 }]);
});
});
|
