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import {
afterDiffSpy,
beforeRenderSpy,
unmountSpy,
hookSpy
} from '../../../test/_util/optionSpies';
import { setupRerender, act } from 'preact/test-utils';
import { createElement, render, createContext, options } from 'preact';
import { setupScratch, teardown } from '../../../test/_util/helpers';
import {
useState,
useReducer,
useEffect,
useLayoutEffect,
useRef,
useImperativeHandle,
useMemo,
useCallback,
useContext,
useErrorBoundary
} from 'preact/hooks';
/** @jsx createElement */
describe('hook options', () => {
/** @type {HTMLDivElement} */
let scratch;
/** @type {() => void} */
let rerender;
/** @type {() => void} */
let increment;
beforeEach(() => {
scratch = setupScratch();
rerender = setupRerender();
afterDiffSpy.resetHistory();
unmountSpy.resetHistory();
beforeRenderSpy.resetHistory();
hookSpy.resetHistory();
});
afterEach(() => {
teardown(scratch);
});
function App() {
const [count, setCount] = useState(0);
increment = () => setCount(prevCount => prevCount + 1);
return <div>{count}</div>;
}
it('should call old options on mount', () => {
render(<App />, scratch);
expect(beforeRenderSpy).to.have.been.called;
expect(afterDiffSpy).to.have.been.called;
});
it('should call old options.diffed on update', () => {
render(<App />, scratch);
increment();
rerender();
expect(beforeRenderSpy).to.have.been.called;
expect(afterDiffSpy).to.have.been.called;
});
it('should call old options on unmount', () => {
render(<App />, scratch);
render(null, scratch);
expect(unmountSpy).to.have.been.called;
});
it('should detect hooks', () => {
const USE_STATE = 1;
const USE_REDUCER = 2;
const USE_EFFECT = 3;
const USE_LAYOUT_EFFECT = 4;
const USE_REF = 5;
const USE_IMPERATIVE_HANDLE = 6;
const USE_MEMO = 7;
const USE_CALLBACK = 8;
const USE_CONTEXT = 9;
const USE_ERROR_BOUNDARY = 10;
const Ctx = createContext(null);
function App() {
useState(0);
useReducer(x => x, 0);
useEffect(() => null, []);
useLayoutEffect(() => null, []);
const ref = useRef(null);
useImperativeHandle(ref, () => null);
useMemo(() => null, []);
useCallback(() => null, []);
useContext(Ctx);
useErrorBoundary(() => null);
}
render(
<Ctx.Provider value="a">
<App />
</Ctx.Provider>,
scratch
);
expect(hookSpy.args.map(arg => [arg[1], arg[2]])).to.deep.equal([
[0, USE_STATE],
[1, USE_REDUCER],
[2, USE_EFFECT],
[3, USE_LAYOUT_EFFECT],
[4, USE_REF],
[5, USE_IMPERATIVE_HANDLE],
[6, USE_MEMO],
[7, USE_CALLBACK],
[8, USE_CONTEXT],
[9, USE_ERROR_BOUNDARY],
// Belongs to useErrorBoundary that uses multiple native hooks.
[10, USE_STATE]
]);
});
describe('Effects', () => {
beforeEach(() => {
options._skipEffects = options.__s = true;
});
afterEach(() => {
options._skipEffects = options.__s = false;
});
it('should skip effect hooks', () => {
const spy = sinon.spy();
function App() {
useEffect(spy, []);
useLayoutEffect(spy, []);
return null;
}
act(() => {
render(<App />, scratch);
});
expect(spy.callCount).to.equal(0);
});
});
});
|
