lepu-test-platform-web/node_modules/fibers/test/future-exception.js

53 lines
1.2 KiB
JavaScript

var Fiber = require('fibers');
var Future = require('future');
// Possible outputs:
// pass: exception is thrown and caught in uncaughtException
// fail: exception is thrown and not caught
// no output: process dies
var thrown = false;
var caught = false;
var async = function(continuation) {
process.nextTick(function() {
continuation();
});
}
process.on('uncaughtException', function(err) {
if (err.message === 'Catch me if you can') {
caught = true;
} else {
throw err;
}
});
// This fiber's job is to throw an exception after yielding.
Fiber(function() {
// yield and resume via Future.wait() and its cb() helper
var sync = Future.wrap(async)();
sync.wait();
// this should get rethrown to the main event loop
thrown = true;
throw new Error('Catch me if you can');
}).run();
// This fiber's job is to make sure the process is still alive after the
// exception was thrown.
Fiber(function() {
// wait for other fiber to throw exception and yield
while (!thrown) {
var sync = Future.wrap(async)();
sync.wait();
}
// wait once more to allow exception to get caught
process.nextTick(function() {
// see if we have noticed the exception we expect to
console.log(caught ? 'pass' : 'fail');
});
}).run();