如何使用TypeScript和mocha进行异步/等待测试
我有一个简单的异步mocha测试,但是如何使用TypeScript和mocha进行异步/等待测试,typescript,async-await,mocha.js,Typescript,Async Await,Mocha.js,我有一个简单的异步mocha测试,但是done()回调似乎从未被调用过 describe("RiBot", function() { it("should start with a random topic", async (done) => { await RiBot.init(); let topic = RiBot.getTopic("testuser") assert.equal(topic, "FAILHERE"); done() }) }
done()
回调似乎从未被调用过
describe("RiBot", function() {
it("should start with a random topic", async (done) => {
await RiBot.init();
let topic = RiBot.getTopic("testuser")
assert.equal(topic, "FAILHERE");
done()
})
})
在这种情况下,断言应该失败,但我只是得到一个超时
RiBot
RibotTest topic +0ms undefined
1) should start with a random topic
0 passing (2s)
1 failing
1) RiBot should start with a random topic:
Error: timeout of 2000ms exceeded. Ensure the done() callback is being called in this test.
编辑:当我以带断言的标准JS代码运行时:
async function testRiBot() {
try {
await RiBot.init()
let topic = RiBot.getTopic("testuser")
debug('topic', topic)
assert.equal(topic, "FAILHERE", 'fail match on topic');
} catch(err) {
debug("err", err, err.stack)
}
}
我确实得到了一个作为错误抛出的异常
RibotTest err +2ms { [AssertionError: fail match on topic]
name: 'AssertionError',
actual: 'undefined',
expected: 'FAILHERE',
operator: '==',
message: 'fail match on topic',
generatedMessage: false } AssertionError: fail match on topic
at /Users/dc/dev/rikai/boteditor/test/RiBot_test.js:19:20
at next (native)
at fulfilled (/Users/dc/dev/rikai/boteditor/test/RiBot_test.js:4:58)
at process._tickCallback (node.js:412:9)
有人能用typescript async/await和mocha提供一个简单的例子吗?试着这样定义你的测试。。。(同时删除您的已完成通话) 注意:如果您的测试返回一个承诺,那么mocha框架将查找要解决或拒绝的承诺,而不是一个已完成的回调。注意异步函数总是返回一个承诺
此外,最好避免使用箭头函数来定义测试,否则您无法从测试中访问正确的
this
上下文(即,您不能在测试代码中调用this.title
。您是否曾经在@dcsan中解决过这个问题?
it('should start with a random topic', async function () {
// ...
});