test: don't check the # of chunks in test-http-1.0

[santigimeno]

As it can happen that the HTTP response is received in more than
one TCP chunk.

It tries to fix the following failure I got in a OS X box

assert.js:90
  throw new assert.AssertionError({
  ^
AssertionError: 1 == 2
    at response_validator (/Users/sgimeno/node/node/test/parallel/test-http-1.0.js:111:12)
    at Socket.<anonymous> (/Users/sgimeno/node/node/test/parallel/test-http-1.0.js:49:7)
    at emitNone (events.js:73:20)
    at Socket.emit (events.js:167:7)
    at endReadableNT (_stream_readable.js:906:12)
    at doNTCallback2 (node.js:452:9)
    at process._tickCallback (node.js:366:17)

Not to sure if this is the correct fix as I don't really understand the reason to check the number of chunks in this test.

[bnoordhuis]

I've never seen that test fail on OS X. What does the second chunk contain?

[santigimeno]

@bnoordhuis It only happened once so I can't really say. I could reproduce it later on increasing the size of the response but that's not the same test. I'll run the tests some more time during the following days and come back with the results

[santigimeno]

@bnoordhuis finally I could reproduce it.
The first chunk contains:

HTTP/1.1 200 OK
Content-Type: text/plain
Connection: close

Hello,

The second chunk:

world!

[bnoordhuis]

Huh, thanks. I figured out why it happens. There are a couple of places where the test does this:

    res.write('Hello, '); res._send('');
    res.write('world!'); res._send('');

Which results in this:

write(19, "HTTP/1.1 200 OK\r\nContent-Type: text/plain\r\nConnection: close\r\n\r\nHello, ", 71) = 71
write(19, "world!", 6)                  = 6

But ends up getting read as a single packet, most of the time anyway.

read(16, "HTTP/1.1 200 OK\r\nContent-Type: text/plain\r\nConnection: close\r\n\r\nHello, world!", 65536) = 77

I wonder if this isn't a performance issue (albeit a minor one) that we can fix by trying harder to coalesce writes. /cc @indutny - I know you were looking into a similar issue recently.

Back to this PR, LGTM. CI: https://ci.nodejs.org/job/node-test-pull-request/851/

[indutny]

Nah, this is not that much related to it. I think.

[indutny]

LGTM

[JungMinu]

LGTM

[bnoordhuis]

Landed in dde2012, thanks Santiago.