test: check number of message events
When a no-op message event handler is used in a test, make it clear what is expected by using `common.mustCall()` and `common.mustNotCall()`. PR-URL: https://github.com/nodejs/node/pull/13125 Reviewed-By: James M Snell <jasnell@gmail.com> Reviewed-By: Anna Henningsen <anna@addaleax.net> Reviewed-By: Colin Ihrig <cjihrig@gmail.com> Reviewed-By: Michael Dawson <mhdawson@ibm.com> Reviewed-By: Gibson Fahnestock <gibfahn@gmail.com> Reviewed-By: Refael Ackermann <refack@gmail.com> Reviewed-By: Luigi Pinca <luigipinca@gmail.com>
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@ -29,7 +29,7 @@ if (process.argv[2] === 'child') {
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setTimeout(function() {
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console.log('child -> will this keep it alive?');
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process.on('message', common.noop);
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process.on('message', common.mustNotCall());
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}, 400);
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} else {
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@ -45,7 +45,7 @@ if (process.argv[2] !== 'child') {
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// the only thing keeping this worker alive will be IPC. This is important,
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// because it means a worker with no parent will have no referenced handles,
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// thus no work to do, and will exit immediately, preventing process leaks.
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process.on('message', common.noop);
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process.on('message', common.mustCall());
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const server = net.createServer((c) => {
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process.once('message', function(msg) {
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