webpack/test/helpers/expectWarningFactory.js

"use strict";

module.exports = () => {
	const warnings = [];
	let oldWarn;

	beforeEach((done) => {
		oldWarn = console.warn;
		console.warn = (m) => warnings.push(m);
		done();
	});

	afterEach((done) => {
		expectWarning();
		console.warn = oldWarn;
		done();
	});

	const expectWarning = (...regexp) => {
		expect(warnings).toEqual(regexp.map((r) => expect.stringMatching(r)));
		warnings.length = 0;
	};

	return expectWarning;
};