jsPsych/tests/plugins/plugin-video-button-response.test.js

const root = '../../';

jest.useFakeTimers();

describe('video-button-response plugin', function(){

	beforeEach(function(){
		require(root + 'jspsych.js');
		// don't load plugin here - need to spy on registerPreload before its called
	});

	test('loads correctly', function(){
		require(root + 'plugins/jspsych-video-button-response.js');
		expect(typeof window.jsPsych.plugins['video-button-response']).not.toBe('undefined');
	});

	test('video preloading registers correctly', function(){
		const preload_spy = jest.spyOn(jsPsych.pluginAPI, 'registerPreload');
		require(root + 'plugins/jspsych-video-button-response.js');
		var trial = {
			type: 'video-button-response',
			stimulus: ['vid.mp4'],
			choices: ['y']
		}
		jsPsych.init({
			timeline: [trial]
		});
		expect(preload_spy).toHaveBeenCalled(); 
		preload_spy.mockRestore();
	});

});