element-web-Github/test/hooks/useLatestResult-test.tsx
Travis Ralston e0d5b11bab
Add a larger buffer to useLatestResult's test (#9178)
Should fix https://github.com/vector-im/element-web/issues/23014

With only a 5ms buffer previously it was possible for Jest to get overwhelmed with the 1500 tests it needs to run. We raise this to 20ms to give extra time to settle.

Even with the high sleep times this won't be the longest running test, so should be fine.

Co-authored-by: Michael Telatynski <7t3chguy@gmail.com>
2022-08-25 14:49:39 -06:00

93 lines
2.9 KiB
TypeScript

/*
Copyright 2022 The Matrix.org Foundation C.I.C.
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
// eslint-disable-next-line deprecate/import
import { mount } from "enzyme";
import { sleep } from "matrix-js-sdk/src/utils";
import React, { useEffect, useState } from "react";
import { act } from "react-dom/test-utils";
import { useLatestResult } from "../../src/hooks/useLatestResult";
function LatestResultsComponent({ query, doRequest }) {
const [value, setValueInternal] = useState<number>(0);
const [updateQuery, updateResult] = useLatestResult(setValueInternal);
useEffect(() => {
updateQuery(query);
doRequest(query).then(it => {
updateResult(query, it);
});
}, [doRequest, query, updateQuery, updateResult]);
return <div>
{ value }
</div>;
}
describe("useLatestResult", () => {
it("should return results", async () => {
const doRequest = async (query) => {
await sleep(180);
return query;
};
const wrapper = mount(<LatestResultsComponent query={0} doRequest={doRequest} />);
await act(async () => {
await sleep(100);
});
expect(wrapper.text()).toEqual("0");
wrapper.setProps({ doRequest, query: 1 });
await act(async () => {
await sleep(70);
});
wrapper.setProps({ doRequest, query: 2 });
await act(async () => {
await sleep(70);
});
expect(wrapper.text()).toEqual("0");
await act(async () => {
await sleep(120);
});
expect(wrapper.text()).toEqual("2");
});
it("should prevent out-of-order results", async () => {
const doRequest = async (query) => {
await sleep(query);
return query;
};
const wrapper = mount(<LatestResultsComponent query={0} doRequest={doRequest} />);
await act(async () => {
await sleep(5);
});
expect(wrapper.text()).toEqual("0");
wrapper.setProps({ doRequest, query: 50 });
await act(async () => {
await sleep(5);
});
wrapper.setProps({ doRequest, query: 1 });
await act(async () => {
await sleep(5);
});
expect(wrapper.text()).toEqual("1");
await act(async () => {
await sleep(50);
});
expect(wrapper.text()).toEqual("1");
});
});