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test: fix flaky test-dgram-exclusive-implicit-bind #10212

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test: fix flaky test-dgram-exclusive-implicit-bind #10212

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151d2ac
test: fix flaky test-dgram-exclusive-implicit-bind
Trott Dec 10, 2016
909e78e
squash: use setInterval instead of chaining setTimeouts
Trott Dec 10, 2016
e346f84
squash: clearTimeout() -> clearInterval()
Trott Dec 11, 2016
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42 changes: 24 additions & 18 deletions test/parallel/test-dgram-exclusive-implicit-bind.js
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Original file line number Diff line number Diff line change
Expand Up @@ -20,10 +20,10 @@
// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
// USE OR OTHER DEALINGS IN THE SOFTWARE.

var common = require('../common');
var assert = require('assert');
var cluster = require('cluster');
var dgram = require('dgram');
const common = require('../common');
const assert = require('assert');
const cluster = require('cluster');
const dgram = require('dgram');

// Without an explicit bind, send() causes an implicit bind, which always
// generate a unique per-socket ephemeral port. An explicit bind to a port
Expand All @@ -40,17 +40,21 @@ var dgram = require('dgram');
// with ENOTSUP.

if (cluster.isMaster) {
var pass;
var messages = 0;
var ports = {};

process.on('exit', function() {
assert.strictEqual(pass, true);
});
const ports = {};
const pids = [];

var target = dgram.createSocket('udp4');

const done = common.mustCall(function() {
cluster.disconnect();
target.close();
});

target.on('message', function(buf, rinfo) {
if (pids.includes(buf.toString()))
return;
pids.push(buf.toString());
messages++;
ports[rinfo.port] = true;

Expand All @@ -63,12 +67,6 @@ if (cluster.isMaster) {
assert.strictEqual(Object.keys(ports).length, 3);
done();
}

function done() {
pass = true;
cluster.disconnect();
target.close();
}
});

target.on('listening', function() {
Expand All @@ -85,7 +83,12 @@ if (cluster.isMaster) {
return;
}

var source = dgram.createSocket('udp4');
const source = dgram.createSocket('udp4');
var interval;

source.on('close', function() {
clearInterval(interval);
});
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From a previous comment I'm not sure this was a problem but can't you get rid of this as the interval is already unrefed? At least locally it works for me

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If I remove that line, the test still passes, but it produces a messy output that looks like it's failing:

$ ./node test/parallel/test-dgram-exclusive-implicit-bind.js
dgram.js:527
    throw new Error('Not running'); // error message from dgram_legacy.js
    ^

Error: Not running
    at Socket._healthCheck (dgram.js:527:11)
    at Socket.send (dgram.js:347:8)
    at Timeout.setInterval [as _onTimeout] (/Users/trott/io.js/test/parallel/test-dgram-exclusive-implicit-bind.js:104:10)
    at ontimeout (timers.js:365:14)
    at Timer.unrefdHandle (timers.js:471:5)
dgram.js:527
    throw new Error('Not running'); // error message from dgram_legacy.js
    ^

Error: Not running
    at Socket._healthCheck (dgram.js:527:11)
    at Socket.send (dgram.js:347:8)
    at Timeout.setInterval [as _onTimeout] (/Users/trott/io.js/test/parallel/test-dgram-exclusive-implicit-bind.js:104:10)
    at ontimeout (timers.js:365:14)
    at Timer.unrefdHandle (timers.js:471:5)
$

I'd prefer the processes clean up after themselves and not generate irrelevant errors like that, even if the errors don't cause the test to fail, so I'd prefer to keep the clearInterval() call.

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Understood


if (process.env.BOUND === 'y') {
source.bind(0);
Expand All @@ -96,4 +99,7 @@ if (process.env.BOUND === 'y') {
source.unref();
}

source.send(Buffer.from('abc'), 0, 3, common.PORT, '127.0.0.1');
const buf = Buffer.from(process.pid.toString());
interval = setInterval(() => {
source.send(buf, common.PORT, '127.0.0.1');
}, 1).unref();