我编写了一个实习生测试，它执行一些相互依赖的 xhr 调用（登录、获取数据）。所以，我已经嵌套了它们，但仍然希望能够chai在我的处理程序中使用断言库。
我发现测试没有正确失败，它总是挂起，最后实习生报告：
FAIL: main - MySuite - Make some async requests.. (10012ms)
CancelError: Timeout reached on main - MySuite - Make some async requests..
这是尽管有一行代码：assert(false, 'Oh no, something went wrong');执行。
从我在断言库中看到的内容来看，它会引发异常，这些异常预计会在调用堆栈的更高位置被捕获，但这种方法不适合异步请求处理程序的调用堆栈。
我可以在代码中此时使用 assert() 风格的函数，还是我被迫拒绝给我的原始 dfd this.async(timeout)？
这个问题与Async test doesn't error on fail因为他滥用了 this.async() 中的原始 dfd 不同。我试图不使用它，而是使用 chai 断言库的更高级别的抽象。
我的简化测试模块：
/*jshint dojo:true */
/*global console:true */
'use strict';
define([
'intern!tdd',
'intern/chai!assert',
'intern/dojo/request'
], function (test, assert, request) {
console.log('Test has started to run.');
var testTimeout = 10000;
test.suite('MySuite', function () {
test.test('Make some async requests..', function () {
var dfd = this.async(testTimeout);
var promise = request('http://dojotoolkit.org/js/dojo/1.8/release/dtk/dijit/themes/claro/claro.css')
.then(function (res) {
console.log('First request OK: ', res.length, ' chars.');
// Make a second request
request('http://dojotoolkit.org/css/print.css')
.then(function (res2) {
console.log('Second request OK: ', res2.length, ' chars.');
// Now pretend we hit an error
console.log('Faking an assert fail...');
assert(false, 'Oh no, something went wrong');
// We would have got here if it weren't for those pesky assertions
dfd.resolve('test passed');
}, function (err) {
// Record the error
console.log('Inner Error handler was hit: ', err);
//Error Callback
//Ensure no HTTP errors raised.
dfd.reject.bind(dfd);
});
},
function (err) {
// Record the error
console.log('Outer Error handler was hit: ', err);
//Error Callback
//Ensure no HTTP errors raised.
dfd.reject.bind(dfd);
});
});
});
});
实习生.js：
// Learn more about configuring this file at <https://github.com/theintern/intern/wiki/Configuring-Intern>.
// These default settings work OK for most people. The options that *must* be changed below are the
// packages, suites, excludeInstrumentation, and (if you want functional tests) functionalSuites.
define([ 'intern/node_modules/dojo/has' ], function (has) {
has.add('dojo-has-api', true);
return {
// Configuration options for the module loader; any AMD configuration options supported by the specified AMD loader
// can be used here
loader: {
// Packages that should be registered with the loader in each testing environment
packages: [
'node',
{ name: 'testing', location: '.' }
]
},
// Non-functional test suite(s) to run in each browser
suites: [ 'testing' /* 'myPackage/tests/foo', 'myPackage/tests/bar' */ ]
}
});
外壳输出：
neek@alyssa:~/src/WIN/testing$ node node_modules/.bin/intern-client config=intern suites=internpromises
Defaulting to "console" reporter
Test has started to run.
First request OK: 135540 chars.
Second request OK: 135540 chars.
Faking an assert fail...
FAIL: main - MySuite - Make some async requests.. (10009ms)
CancelError: Timeout reached on main - MySuite - Make some async requests..
at Error (<anonymous>)