/
useParams-test.js
101 lines (85 loc) · 2.31 KB
/
useParams-test.js
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import React from "react";
import ReactDOM from "react-dom";
import { MemoryRouter, Route, useMatch, useParams } from "react-router";
import renderStrict from "./utils/renderStrict.js";
describe("useParams", () => {
const node = document.createElement("div");
afterEach(() => {
ReactDOM.unmountComponentAtNode(node);
});
describe("when the path has no params", () => {
it("returns an empty hash", () => {
let params;
function HomePage() {
params = useParams();
return null;
}
renderStrict(
<MemoryRouter initialEntries={["/home"]}>
<Route path="/home">
<HomePage />
</Route>
</MemoryRouter>,
node
);
expect(typeof params).toBe("object");
expect(Object.keys(params)).toHaveLength(0);
});
});
describe("when the path has some params", () => {
it("returns a hash of the URL params and their values", () => {
let params;
function BlogPost() {
params = useParams();
return null;
}
renderStrict(
<MemoryRouter initialEntries={["/blog/cupcakes"]}>
<Route path="/blog/:slug">
<BlogPost />
</Route>
</MemoryRouter>,
node
);
expect(typeof params).toBe("object");
expect(params).toMatchObject({
slug: "cupcakes"
});
});
describe("a child route", () => {
it("returns a combined hash of the parent and child params", () => {
let params;
function Course() {
params = useParams();
return null;
}
function Users() {
const match = useMatch();
return (
<div>
<h1>Users</h1>
<Route path={`${match.path}/courses/:course`}>
<Course />
</Route>
</div>
);
}
renderStrict(
<MemoryRouter
initialEntries={["/users/mjackson/courses/react-router"]}
>
<Route path="/users/:username">
<Users />
</Route>
</MemoryRouter>,
node
);
expect(typeof params).toBe("object");
expect(params).toMatchObject({
username: "mjackson",
course: "react-router"
});
});
});
});
});