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'use strict';
require('../common');
const assert = require('assert');
const cluster = require('cluster');
assert(cluster.isMaster);
// The cluster.settings object is cloned even though the current implementation
// makes that unnecessary. This is to make the test less fragile if the
// implementation ever changes such that cluster.settings is mutated instead of
// replaced.
function cheapClone(obj) {
return JSON.parse(JSON.stringify(obj));
}
const configs = [];
// Capture changes
cluster.on('setup', function() {
console.log('"setup" emitted', cluster.settings);
configs.push(cheapClone(cluster.settings));
});
const execs = [
'node-next',
'node-next-2',
'node-next-3',
];
process.on('exit', function assertTests() {
// Tests that "setup" is emitted for every call to setupMaster
assert.strictEqual(configs.length, execs.length);
assert.strictEqual(configs[0].exec, execs[0]);
assert.strictEqual(configs[1].exec, execs[1]);
assert.strictEqual(configs[2].exec, execs[2]);
});
// Make changes to cluster settings
execs.forEach(function(v, i) {
setTimeout(function() {
cluster.setupMaster({ exec: v });
}, i * 100);
});
// cluster emits 'setup' asynchronously, so we must stay alive long
// enough for that to happen
setTimeout(function() {
console.log('cluster setup complete');
}, (execs.length + 1) * 100);
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