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