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'use strict';
const common = require('../common');
const assert = require('assert');
const domain = require('domain');
const EventEmitter = require('events');
/*
* Make sure that the domains stack and the active domain is setup properly when
* a domain's error handler is called due to an error event being emitted.
* More specifically, we want to test that:
* - the active domain in the domain's error handler is *not* that domain, *but*
* the active domain is a any direct parent domain at the time the error was
* emitted.
* - the domains stack in the domain's error handler does *not* include that
* domain, *but* it includes all parents of that domain when the error was
* emitted.
*/
const d1 = domain.create();
const d2 = domain.create();
const d3 = domain.create();
function checkExpectedDomains(err) {
// First, check that domains stack and active domain is as expected when the
// event handler is called synchronously via ee.emit('error').
if (domain._stack.length !== err.expectedStackLength) {
console.error('expected domains stack length of %d, but instead is %d',
err.expectedStackLength, domain._stack.length);
process.exit(1);
}
if (process.domain !== err.expectedActiveDomain) {
console.error('expected active domain to be %j, but instead is %j',
err.expectedActiveDomain, process.domain);
process.exit(1);
}
// Then make sure that the domains stack and active domain is setup as
// expected when executing a callback scheduled via nextTick from the error
// handler.
process.nextTick(() => {
const expectedStackLengthInNextTickCb =
err.expectedStackLength > 0 ? 1 : 0;
if (domain._stack.length !== expectedStackLengthInNextTickCb) {
console.error('expected stack length in nextTick cb to be %d, ' +
'but instead is %d', expectedStackLengthInNextTickCb,
domain._stack.length);
process.exit(1);
}
const expectedActiveDomainInNextTickCb =
expectedStackLengthInNextTickCb === 0 ? undefined :
err.expectedActiveDomain;
if (process.domain !== expectedActiveDomainInNextTickCb) {
console.error('expected active domain in nextTick cb to be %j, ' +
'but instead is %j', expectedActiveDomainInNextTickCb,
process.domain);
process.exit(1);
}
});
}
d1.on('error', common.mustCall((err) => {
checkExpectedDomains(err);
}, 2));
d2.on('error', common.mustCall((err) => {
checkExpectedDomains(err);
}, 2));
d3.on('error', common.mustCall((err) => {
checkExpectedDomains(err);
}, 1));
d1.run(() => {
const ee = new EventEmitter();
assert.strictEqual(process.domain, d1);
assert.strictEqual(domain._stack.length, 1);
const err = new Error('oops');
err.expectedStackLength = 0;
err.expectedActiveDomain = null;
ee.emit('error', err);
assert.strictEqual(process.domain, d1);
assert.strictEqual(domain._stack.length, 1);
});
d1.run(() => {
d1.run(() => {
const ee = new EventEmitter();
assert.strictEqual(process.domain, d1);
assert.strictEqual(domain._stack.length, 2);
const err = new Error('oops');
err.expectedStackLength = 0;
err.expectedActiveDomain = null;
ee.emit('error', err);
assert.strictEqual(process.domain, d1);
assert.strictEqual(domain._stack.length, 2);
});
});
d1.run(() => {
d2.run(() => {
const ee = new EventEmitter();
assert.strictEqual(process.domain, d2);
assert.strictEqual(domain._stack.length, 2);
const err = new Error('oops');
err.expectedStackLength = 1;
err.expectedActiveDomain = d1;
ee.emit('error', err);
assert.strictEqual(process.domain, d2);
assert.strictEqual(domain._stack.length, 2);
});
});
d1.run(() => {
d2.run(() => {
d2.run(() => {
const ee = new EventEmitter();
assert.strictEqual(process.domain, d2);
assert.strictEqual(domain._stack.length, 3);
const err = new Error('oops');
err.expectedStackLength = 1;
err.expectedActiveDomain = d1;
ee.emit('error', err);
assert.strictEqual(process.domain, d2);
assert.strictEqual(domain._stack.length, 3);
});
});
});
d3.run(() => {
d1.run(() => {
d3.run(() => {
d3.run(() => {
const ee = new EventEmitter();
assert.strictEqual(process.domain, d3);
assert.strictEqual(domain._stack.length, 4);
const err = new Error('oops');
err.expectedStackLength = 2;
err.expectedActiveDomain = d1;
ee.emit('error', err);
assert.strictEqual(process.domain, d3);
assert.strictEqual(domain._stack.length, 4);
});
});
});
});
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