Cookie domain validation rule on client side is strange

[b12031106]

for example,

if current domain is https://www.google.com,
and you try set cookie with domain .google.com：

document.cookie = 'a=b; domain=.google.com;';

In normal browser, this code is working fine,
I can get this cookie value by access document.cookie,

but in Testcafe browser, this code is not working,
and I find out maybe is because client side cookie validation is strange:

https://github.com/DevExpress/testcafe-hammerhead/blob/master/src/client/sandbox/cookie/index.js#L85

return !parsedCookie.domain || parsedDestLocation.hostname === parsedCookie.domain;

this line means that when you set a cookie with domain attribute,
it should be exactly the same with current hostname,
but this behavior is different to a normal browser.

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