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'use strict';
// test-cluster-worker-kill.js
// verifies that, when a child process is killed (we use SIGKILL)
// - the parent receives the proper events in the proper order, no duplicates
// - the exitCode and signalCode are correct in the 'exit' event
// - the worker.exitedAfterDisconnect flag, and worker.state are correct
// - the worker process actually goes away
const common = require('../common');
const assert = require('assert');
const cluster = require('cluster');
if (cluster.isWorker) {
const http = require('http');
const server = http.Server(() => { });
server.once('listening', common.mustCall(() => { }));
server.listen(common.PORT, '127.0.0.1');
} else if (cluster.isMaster) {
const KILL_SIGNAL = 'SIGKILL',
expected_results = {
cluster_emitDisconnect: [1, "the cluster did not emit 'disconnect'"],
cluster_emitExit: [1, "the cluster did not emit 'exit'"],
cluster_exitCode: [null, 'the cluster exited w/ incorrect exitCode'],
cluster_signalCode: [KILL_SIGNAL,
'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_exitedAfter: [false,
'the .exitedAfterDisconnect flag is incorrect'],
worker_died: [true, 'the worker is still running'],
worker_exitCode: [null, 'the worker exited w/ incorrect exitCode'],
worker_signalCode: [KILL_SIGNAL,
'the worker exited w/ incorrect signalCode']
},
results = {
cluster_emitDisconnect: 0,
cluster_emitExit: 0,
worker_emitDisconnect: 0,
worker_emitExit: 0
};
// start worker
const worker = cluster.fork();
// when the worker is up and running, kill it
worker.once('listening', common.mustCall(() => {
worker.process.kill(KILL_SIGNAL);
}));
// Check cluster events
cluster.on('disconnect', common.mustCall(() => {
results.cluster_emitDisconnect += 1;
}));
cluster.on('exit', common.mustCall((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', common.mustCall(() => {
results.worker_emitDisconnect += 1;
results.worker_exitedAfter = worker.exitedAfterDisconnect;
results.worker_state = worker.state;
}));
// Check that the worker died
worker.once('exit', common.mustCall((exitCode, signalCode) => {
results.worker_exitCode = exitCode;
results.worker_signalCode = signalCode;
results.worker_emitExit += 1;
results.worker_died = !common.isAlive(worker.process.pid);
}));
process.on('exit', () => {
checkResults(expected_results, results);
});
}
// some helper functions ...
function checkResults(expected_results, results) {
for (const k in expected_results) {
const actual = results[k];
const expected = expected_results[k];
assert.strictEqual(actual,
expected && expected.length ? expected[0] : expected,
(expected[1] || '') +
` [expected: ${expected[0]} / actual: ${actual}]`);
}
}
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