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test: fixed flaky test-http-readable-data-event #19931

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test: fixed flaky test-http-readable-data-event #19931

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14 changes: 10 additions & 4 deletions test/parallel/test-http-readable-data-event.js
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Original file line number Diff line number Diff line change
Expand Up @@ -6,16 +6,21 @@ const http = require('http');
const helloWorld = 'Hello World!';
const helloAgainLater = 'Hello again later!';

let next = null;

const server = http.createServer((req, res) => {
res.writeHead(200, {
'Content-Length': '' + (helloWorld.length + helloAgainLater.length)
});
res.write(helloWorld);

// we need to make sure the data is flushed
setTimeout(() => {
// before writing again
next = () => {
res.end(helloAgainLater);
}, common.platformTimeout(10));
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Bonus points for making an instance of platformTimeout() unnecessary.

next = () => {};
};

res.write(helloWorld);
}).listen(0, function() {
const opts = {
hostname: 'localhost',
Expand All @@ -27,14 +32,15 @@ const server = http.createServer((req, res) => {
const expectedRead = [helloWorld, null, helloAgainLater, null];

const req = http.request(opts, (res) => {
res.on('error', common.mustNotCall);
res.on('error', common.mustNotCall());
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👍


res.on('readable', common.mustCall(() => {
let data;

do {
data = res.read();
assert.strictEqual(data, expectedRead.shift());
next();
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I suggest to remove the next and use a boolean to verify that res.end(helloAgainLater) was not yet called. That should be simpler but does the same as far as I read the code.

// Here
if (!streamEnded) {
  res.end(helloAgainLater);
  streamEnded = true;
}
// At the top of the file
let streamEnded = false;

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It’s not what the test is supposed to verify. The intent is that we need to wait for the first chunk to be received before sending the second.

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The next call can be moved after the loop but it's also ok as is.

} while (data !== null);
}, 2));

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