Current File : //proc/self/root/usr/src/node-v0.10.4/test/simple/test-domain.js
// Copyright Joyent, Inc. and other Node contributors.
//
// Permission is hereby granted, free of charge, to any person obtaining a
// copy of this software and associated documentation files (the
// "Software"), to deal in the Software without restriction, including
// without limitation the rights to use, copy, modify, merge, publish,
// distribute, sublicense, and/or sell copies of the Software, and to permit
// persons to whom the Software is furnished to do so, subject to the
// following conditions:
//
// The above copyright notice and this permission notice shall be included
// in all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
// USE OR OTHER DEALINGS IN THE SOFTWARE.
// Simple tests of most basic domain functionality.
var common = require('../common');
var assert = require('assert');
var domain = require('domain');
var events = require('events');
var fs = require('fs');
var caught = 0;
var expectCaught = 0;
var d = new domain.Domain();
var e = new events.EventEmitter();
d.on('error', function(er) {
console.error('caught', er && (er.message || er));
var er_message = er.message;
var er_path = er.path
// On windows, error messages can contain full path names. If this is the
// case, remove the directory part.
if (typeof er_path === 'string') {
var slash = er_path.lastIndexOf('\\');
if (slash !== -1) {
var dir = er_path.slice(0, slash + 1);
er_path = er_path.replace(dir, '');
er_message = er_message.replace(dir, '');
}
}
switch (er_message) {
case 'emitted':
assert.equal(er.domain, d);
assert.equal(er.domainEmitter, e);
assert.equal(er.domainThrown, false);
break;
case 'bound':
assert.ok(!er.domainEmitter);
assert.equal(er.domain, d);
assert.equal(er.domainBound, fn);
assert.equal(er.domainThrown, false);
break;
case 'thrown':
assert.ok(!er.domainEmitter);
assert.equal(er.domain, d);
assert.equal(er.domainThrown, true);
break;
case "ENOENT, open 'this file does not exist'":
assert.equal(er.domain, d);
assert.equal(er.domainThrown, false);
assert.equal(typeof er.domainBound, 'function');
assert.ok(!er.domainEmitter);
assert.equal(er.code, 'ENOENT');
assert.equal(er_path, 'this file does not exist');
assert.equal(typeof er.errno, 'number');
break;
case "ENOENT, open 'stream for nonexistent file'":
assert.equal(typeof er.errno, 'number');
assert.equal(er.code, 'ENOENT');
assert.equal(er_path, 'stream for nonexistent file');
assert.equal(er.domain, d);
assert.equal(er.domainEmitter, fst);
assert.ok(!er.domainBound);
assert.equal(er.domainThrown, false);
break;
case 'implicit':
assert.equal(er.domainEmitter, implicit);
assert.equal(er.domain, d);
assert.equal(er.domainThrown, false);
assert.ok(!er.domainBound);
break;
case 'implicit timer':
assert.equal(er.domain, d);
assert.equal(er.domainThrown, true);
assert.ok(!er.domainEmitter);
assert.ok(!er.domainBound);
break;
case 'Cannot call method \'isDirectory\' of undefined':
assert.equal(er.domain, d);
assert.ok(!er.domainEmitter);
assert.ok(!er.domainBound);
break;
case 'nextTick execution loop':
assert.equal(er.domain, d);
assert.ok(!er.domainEmitter);
assert.ok(!er.domainBound);
break;
default:
console.error('unexpected error, throwing %j', er.message, er);
throw er;
}
caught++;
});
process.on('exit', function() {
console.error('exit', caught, expectCaught);
assert.equal(caught, expectCaught, 'caught the expected number of errors');
console.log('ok');
});
// revert to using the domain when a callback is passed to nextTick in
// the middle of a tickCallback loop
d.run(function() {
process.nextTick(function() {
throw new Error('nextTick execution loop');
});
});
expectCaught++;
// catch thrown errors no matter how many times we enter the event loop
// this only uses implicit binding, except for the first function
// passed to d.run(). The rest are implicitly bound by virtue of being
// set up while in the scope of the d domain.
d.run(function() {
process.nextTick(function() {
var i = setInterval(function () {
clearInterval(i);
setTimeout(function() {
fs.stat('this file does not exist', function(er, stat) {
// uh oh! stat isn't set!
// pretty common error.
console.log(stat.isDirectory());
});
});
});
});
});
expectCaught++;
// implicit addition of a timer created within a domain-bound context.
d.run(function() {
setTimeout(function() {
throw new Error('implicit timer');
});
});
expectCaught++;
// Event emitters added to the domain have their errors routed.
d.add(e);
e.emit('error', new Error('emitted'));
expectCaught++;
// get rid of the `if (er) return cb(er)` malarky, by intercepting
// the cb functions to the domain, and using the intercepted function
// as a callback instead.
function fn(er) {
throw new Error('This function should never be called!');
process.exit(1);
}
var bound = d.intercept(fn);
bound(new Error('bound'));
expectCaught++;
// intercepted should never pass first argument to callback
function fn2(data) {
assert.equal(data, 'data', 'should not be null err argument')
}
var bound = d.intercept(fn2);
bound(null, 'data');
// intercepted should never pass first argument to callback
// even if arguments length is more than 2.
function fn3(data, data2) {
assert.equal(data, 'data', 'should not be null err argument');
assert.equal(data2, 'data2', 'should not be data argument');
}
bound = d.intercept(fn3);
bound(null, 'data', 'data2');
// throwing in a bound fn is also caught,
// even if it's asynchronous, by hitting the
// global uncaughtException handler. This doesn't
// require interception, since throws are always
// caught by the domain.
function thrower() {
throw new Error('thrown');
}
setTimeout(d.bind(thrower), 100);
expectCaught++;
// Pass an intercepted function to an fs operation that fails.
fs.open('this file does not exist', 'r', d.intercept(function(er) {
console.error('should not get here!', er);
throw new Error('should not get here!');
}, true));
expectCaught++;
// implicit addition by being created within a domain-bound context.
var implicit;
d.run(function() {
implicit = new events.EventEmitter;
});
setTimeout(function() {
// escape from the domain, but implicit is still bound to it.
implicit.emit('error', new Error('implicit'));
}, 10);
expectCaught++;
var result = d.run(function () {
return 'return value';
});
assert.equal(result, 'return value');
var fst = fs.createReadStream('stream for nonexistent file')
d.add(fst)
expectCaught++;
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