I'm trying to figure out how to test a Web UI library that manipulates DOM, while accessing global objects window and document directly.
And I have tried to use the combination of jest + jsdom:
const jsdom = require('jsdom');
const {JSDOM} = jsdom;
const dom = new JSDOM('<!DOCTYPE html><p>Hello world</p>');
// global.window = dom.window;
// global.document = dom.window.document;
test('can search the DOM', () => {
// this doesn't work
expect(global.document.querySelectorAll('p').length).toBe(1);
});
How can I make this DOM available inside the library, so it can be tested?
Or am I doing something entirely wrong here?
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