error-handling.tap.js
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'use strict';
var test = require('tap').test
, cls = require('../context.js')
, domain = require('domain')
;
test("continuation-local storage glue with a throw in the continuation chain",
function (t) {
var namespace = cls.createNamespace('test');
namespace.run(function () {
var d = domain.create();
namespace.set('outer', true);
d.on('error', function (blerg) {
t.equal(blerg.message, "explicitly nonlocal exit", "got the expected exception");
t.ok(namespace.get('outer'), "outer context is still active");
t.notOk(namespace.get('inner'), "inner context should have been exited by throw");
t.equal(namespace._set.length, 1, "should be back to outer state");
cls.destroyNamespace('test');
t.end();
});
// tap is only trying to help
process.nextTick(d.bind(function () {
t.ok(namespace.get('outer'), "outer mutation worked");
t.notOk(namespace.get('inner'), "inner mutation hasn't happened yet");
namespace.run(function () {
namespace.set('inner', true);
throw new Error("explicitly nonlocal exit");
});
}));
});
});
test("synchronous throw attaches the context", function (t) {
t.plan(3);
var namespace = cls.createNamespace('cls@synchronous');
namespace.run(function () {
namespace.set('value', 'transaction clear');
try {
namespace.run(function () {
namespace.set('value', 'transaction set');
throw new Error('cls@synchronous explosion');
});
}
catch (e) {
t.ok(namespace.fromException(e), "context was attached to error");
t.equal(namespace.fromException(e)['value'], 'transaction set',
"found the inner value");
}
t.equal(namespace.get('value'), 'transaction clear', "everything was reset");
});
cls.destroyNamespace('cls@synchronous');
});
test("synchronous throw checks if error exists", function (t) {
t.plan(2);
var namespace = cls.createNamespace('cls@synchronous-null-error');
namespace.run(function () {
namespace.set('value', 'transaction clear');
try {
namespace.run(function () {
namespace.set('value', 'transaction set');
throw null;
});
}
catch (e) {
// as we had a null error, cls couldn't set the new inner value
t.equal(namespace.get('value'), 'transaction clear', 'from outer value');
}
t.equal(namespace.get('value'), 'transaction clear', "everything was reset");
});
cls.destroyNamespace('cls@synchronous-null-error');
});
test("throw in process.nextTick attaches the context", function (t) {
t.plan(3);
var namespace = cls.createNamespace('cls@nexttick');
var d = domain.create();
d.on('error', function (e) {
t.ok(namespace.fromException(e), "context was attached to error");
t.equal(namespace.fromException(e)['value'], 'transaction set',
"found the inner value");
cls.destroyNamespace('cls@nexttick');
});
namespace.run(function () {
namespace.set('value', 'transaction clear');
// tap is only trying to help
process.nextTick(d.bind(function () {
namespace.run(function () {
namespace.set('value', 'transaction set');
throw new Error("cls@nexttick explosion");
});
}));
t.equal(namespace.get('value'), 'transaction clear', "everything was reset");
});
});
test("throw in setTimeout attaches the context", function (t) {
t.plan(3);
var namespace = cls.createNamespace('cls@nexttick');
var d = domain.create();
d.on('error', function (e) {
t.ok(namespace.fromException(e), "context was attached to error");
t.equal(namespace.fromException(e)['value'], 'transaction set',
"found the inner value");
cls.destroyNamespace('cls@nexttick');
});
namespace.run(function () {
namespace.set('value', 'transaction clear');
// tap is only trying to help
setTimeout(d.bind(function () {
namespace.run(function () {
namespace.set('value', 'transaction set');
throw new Error("cls@nexttick explosion");
});
}));
t.equal(namespace.get('value'), 'transaction clear', "everything was reset");
});
});