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'use strict';
// test-cluster-worker-exit.js
// verifies that, when a child process exits (by calling `process.exit(code)`)
// - the parent receives the proper events in the proper order, no duplicates
// - the exitCode and signalCode are correct in the 'exit' event
// - the worker.suicide flag, and worker.state are correct
// - the worker process actually goes away
var common = require('../common');
var assert = require('assert');
var cluster = require('cluster');
var EXIT_CODE = 42;
if (cluster.isWorker) {
var http = require('http');
var server = http.Server(function() { });
server.once('listening', function() {
process.exit(EXIT_CODE);
});
server.listen(common.PORT, '127.0.0.1');
} else if (cluster.isMaster) {
var expected_results = {
cluster_emitDisconnect: [1, "the cluster did not emit 'disconnect'"],
cluster_emitExit: [1, "the cluster did not emit 'exit'"],
cluster_exitCode: [EXIT_CODE, 'the cluster exited w/ incorrect exitCode'],
cluster_signalCode: [null, 'the cluster exited w/ incorrect signalCode'],
worker_emitDisconnect: [1, "the worker did not emit 'disconnect'"],
worker_emitExit: [1, "the worker did not emit 'exit'"],
worker_state: ['disconnected', 'the worker state is incorrect'],
worker_suicideMode: [false, 'the worker.suicide flag is incorrect'],
worker_died: [true, 'the worker is still running'],
worker_exitCode: [EXIT_CODE, 'the worker exited w/ incorrect exitCode'],
worker_signalCode: [null, 'the worker exited w/ incorrect signalCode']
};
var results = {
cluster_emitDisconnect: 0,
cluster_emitExit: 0,
worker_emitDisconnect: 0,
worker_emitExit: 0
};
// start worker
var worker = cluster.fork();
worker.once('listening', function() {
// the worker is up and running...
});
// Check cluster events
cluster.on('disconnect', function() {
results.cluster_emitDisconnect += 1;
});
cluster.on('exit', function(worker) {
results.cluster_exitCode = worker.process.exitCode;
results.cluster_signalCode = worker.process.signalCode;
results.cluster_emitExit += 1;
});
// Check worker events and properties
worker.on('disconnect', function() {
results.worker_emitDisconnect += 1;
results.worker_suicideMode = worker.suicide;
results.worker_state = worker.state;
if (results.worker_emitExit > 0) {
process.nextTick(function() { finish_test(); });
}
});
// Check that the worker died
worker.once('exit', function(exitCode, signalCode) {
results.worker_exitCode = exitCode;
results.worker_signalCode = signalCode;
results.worker_emitExit += 1;
results.worker_died = !alive(worker.process.pid);
if (results.worker_emitDisconnect > 0) {
process.nextTick(function() { finish_test(); });
}
});
var finish_test = function() {
try {
checkResults(expected_results, results);
} catch (exc) {
console.error('FAIL: ' + exc.message);
if (exc.name != 'AssertionError') {
console.trace(exc);
}
process.exit(1);
return;
}
process.exit(0);
};
}
// some helper functions ...
function checkResults(expected_results, results) {
for (var k in expected_results) {
const actual = results[k];
const expected = expected_results[k];
var msg = (expected[1] || '') +
(' [expected: ' + expected[0] + ' / actual: ' + actual + ']');
if (expected && expected.length) {
assert.equal(actual, expected[0], msg);
} else {
assert.equal(actual, expected, msg);
}
}
}
function alive(pid) {
try {
process.kill(pid, 'SIGCONT');
return true;
} catch (e) {
return false;
}
}
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