react-native-web-internals
Version:
React Native for Web
82 lines (81 loc) • 2.56 kB
JavaScript
import { cleanup, render } from "@testing-library/react";
import * as React from "react";
import { act } from "react-dom/test-utils";
import useMergeRefs from "../index.mjs";
import { jsx } from "react/jsx-runtime";
describe("modules/useMergeRefs/index.js", () => {
function TestComponent({
refs,
...rest
}) {
const mergedRef = useMergeRefs(...refs);
return /* @__PURE__ */jsx("div", {
ref: mergedRef,
...rest
});
}
afterEach(cleanup), test("handles no refs", () => {
act(() => {
render(/* @__PURE__ */jsx(TestComponent, {
refs: []
}));
});
}), test("merges any number of varying refs", () => {
const callbackRef1 = jest.fn(),
callbackRef2 = jest.fn(),
objectRef1 = React.createRef(),
objectRef2 = React.createRef(),
nullRef = null;
act(() => {
render(/* @__PURE__ */jsx(TestComponent, {
refs: [callbackRef1, callbackRef2, objectRef1, objectRef2, nullRef]
}));
}), expect(callbackRef1).toHaveBeenCalledTimes(1), expect(callbackRef2).toHaveBeenCalledTimes(1), expect(objectRef1.current).toBeInstanceOf(HTMLDivElement), expect(objectRef2.current).toBeInstanceOf(HTMLDivElement);
}), test("ref is called when ref changes", () => {
const ref = jest.fn(),
nextRef = jest.fn();
let rerender;
act(() => {
({
rerender
} = render(/* @__PURE__ */jsx(TestComponent, {
refs: [ref]
})));
}), expect(ref).toHaveBeenCalled(), act(() => {
rerender(/* @__PURE__ */jsx(TestComponent, {
refs: [nextRef]
}));
}), expect(nextRef).toHaveBeenCalled();
}), test("ref is not called for each rerender", () => {
const ref = jest.fn();
let rerender;
act(() => {
({
rerender
} = render(/* @__PURE__ */jsx(TestComponent, {
refs: [ref]
})));
}), expect(ref).toHaveBeenCalledTimes(1), act(() => {
rerender(/* @__PURE__ */jsx(TestComponent, {
refs: [ref]
}));
}), expect(ref).toHaveBeenCalledTimes(1);
}), test("ref is not called for props changes", () => {
const ref = jest.fn();
let rerender;
act(() => {
({
rerender
} = render(/* @__PURE__ */jsx(TestComponent, {
id: "foo",
refs: [ref]
})));
}), expect(ref).toHaveBeenCalledTimes(1), act(() => {
rerender(/* @__PURE__ */jsx(TestComponent, {
id: "bar",
refs: [ref]
}));
}), expect(ref).toHaveBeenCalledTimes(1);
});
});
//# sourceMappingURL=index-test.mjs.map