I am working with playwright e2e testing, and I noticed that when trying to use beforeEach as a function of my own without destructing the page from the args property
test.beforeEach((args, testInfo) => {
console.log('heyo');
});
i got the following error:
npm run test
> [email protected] test
> playwright test
Error: First argument must use the object destructuring pattern: args
defined at playwright/appName.test.ts:7:8
I want to have the same functionality in my functions (to enforce using destructuring) how can I achieve this?
I tried digging through the playwright code to understand how they did it without success.
CodePudding user response：
What playwright does is looking at the source code of the function at runtime, and doing some rudimentary parsing to check and enforce the destructing.
The important bits:
// get me the code
const text = fn.toString();
// after naive parsing, check if we are destructing
if (firstParam[0] !== '{' || firstParam[firstParam.length - 1] !== '}')
addFatalError('First argument must use the object destructuring pattern: ' firstParam, location);
Do no attempt to do this, unless you have a solid reason to do so