Response.bodyUsed is not spec compliant

[tkrotoff]

Bug Description

Response.bodyUsed does not comply with specs

const response = new Response();
expect(response.bodyUsed).toEqual(false); // OK

expect(await response.text()).toEqual('');
expect(response.bodyUsed).toEqual(true); // Fail

Once the response has been read bodyUsed should be true
This what Chrome, Firefox, WebKit, old Edge, node-fetch and whatwg-fetch do

From the spec: https://fetch.spec.whatwg.org/#dom-body-bodyused

The bodyUsed getter steps are to return true if this’s body is non-null and this’s body’s stream is disturbed; otherwise false.

Environment

• Tested with Node.js v18.12.1 without undici package
• Tested with Node.js v18.12.1 and undici package v5.13.0

[ronag]

Chrome console disagrees:

<< const response = new Response()
>> undefined
<< response.bodyUsed
>> false
<< await response.text()
>> ''
<< response.bodyUsed
>> false

You can only have bodyUsed if there is a body, the default constructed Response has no body.

[tkrotoff]

You are right, I'm sorry about this bad issue

FYI it's node-fetch & whatwg-fetch that are not spec compliant