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'use strict';
const common = require('../common');
const assert = require('assert');
const http = require('http');
const durationBetweenIntervals = [];
let timeoutTooShort = false;
const TIMEOUT = common.platformTimeout(200);
const INTERVAL = Math.floor(TIMEOUT / 8);
runTest(TIMEOUT);
function runTest(timeoutDuration) {
let intervalWasInvoked = false;
let newTimeoutDuration = 0;
const closeCallback = (err) => {
assert.ifError(err);
if (newTimeoutDuration) {
runTest(newTimeoutDuration);
}
};
const server = http.createServer((req, res) => {
server.close(common.mustCall(closeCallback));
res.writeHead(200);
res.flushHeaders();
req.setTimeout(timeoutDuration, () => {
if (!intervalWasInvoked) {
// Interval wasn't invoked, probably because the machine is busy with
// other things. Try again with a longer timeout.
newTimeoutDuration = timeoutDuration * 2;
console.error('The interval was not invoked.');
console.error(`Trying w/ timeout of ${newTimeoutDuration}.`);
return;
}
if (timeoutTooShort) {
intervalWasInvoked = false;
timeoutTooShort = false;
newTimeoutDuration =
Math.max(...durationBetweenIntervals, timeoutDuration) * 2;
console.error(`Time between intervals: ${durationBetweenIntervals}`);
console.error(`Trying w/ timeout of ${newTimeoutDuration}`);
return;
}
assert.fail('Request timeout should not fire');
});
req.resume();
req.once('end', () => {
res.end();
});
});
server.listen(0, common.mustCall(() => {
const req = http.request({
port: server.address().port,
method: 'POST'
}, () => {
let lastIntervalTimestamp = Date.now();
const interval = setInterval(() => {
const lastDuration = Date.now() - lastIntervalTimestamp;
durationBetweenIntervals.push(lastDuration);
lastIntervalTimestamp = Date.now();
if (lastDuration > timeoutDuration / 2) {
// The interval is supposed to be about 1/8 of the timeout duration.
// If it's running so infrequently that it's greater than 1/2 the
// timeout duration, then run the test again with a longer timeout.
timeoutTooShort = true;
}
intervalWasInvoked = true;
req.write('a');
}, INTERVAL);
setTimeout(() => {
clearInterval(interval);
req.end();
}, timeoutDuration);
});
req.write('.');
}));
}
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