declare let window:WindowWithCypressAsserter; interface WindowWithCypressAsserter extends Window { cypressAsserter: CypressAsserter; } //this class is used to communicate with cypress, our e2e testing client //Since cypress cannot manipulate canvas, we notified it with console logs class CypressAsserter { constructor() { window.cypressAsserter = this } gameStarted() { console.log('Started the game') } preloadStarted() { console.log('Preloading') } preloadFinished() { console.log('Preloading done') } initStarted() { console.log('startInit') } initFinished() { console.log('startInit done') } } export const cypressAsserter = new CypressAsserter()