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/* 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 memoize from "../memoize";
const a = { number: 3 };
const b = { number: 4 };
const c = { number: 5 };
const d = { number: 6 };
function add(...numberObjects) {
return numberObjects.reduce((prev, cur) => prev + cur.number, 0);
}
describe("memozie", () => {
it("should work for one arg as key", () => {
const mAdd = memoize(add);
mAdd(a);
expect(mAdd(a)).toEqual(3);
mAdd(b);
expect(mAdd(b)).toEqual(4);
});
it("should only be called once", () => {
const spy = jest.fn(() => 2);
const mAdd = memoize(spy);
mAdd(a);
mAdd(a);
mAdd(a);
expect(spy).toHaveBeenCalledTimes(1);
});
it("should work for two args as key", () => {
const mAdd = memoize(add);
expect(mAdd(a, b)).toEqual(7);
expect(mAdd(a, b)).toEqual(7);
expect(mAdd(a, c)).toEqual(8);
});
it("should work with many args as key", () => {
const mAdd = memoize(add);
expect(mAdd(a, b, c)).toEqual(12);
expect(mAdd(a, b, d)).toEqual(13);
expect(mAdd(a, b, c)).toEqual(12);
});
});
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