function plugin (wdInstance, requests) {
	if (typeof wdInstance.addCommand !== 'function') {
		throw new Error('You can\'t use WebdriverAjaxStub with this version of WebdriverIO');
	}

	function stub(requests, done) {
		window.XMLHttpRequest = function () {
			this.open = function (method, url) {
				this.method = method;
				this.url = url;
			};

			this.send = function () {
				this.status = 200;
				this.readyState = 4;
				const response = requests.shift() || [];
				this.response = response;
				this.responseText = response;
				this.onreadystatechange();
			};

			return this;
		};

		done();
	}

	wdInstance.addCommand('setupStub', function() {
		return wdInstance.executeAsync(stub, requests);
	});
}

module.exports.init = plugin;