[英]Promise resolves after awaited but data is undefined
JavaScript 大师,我在这里错过了什么?
简单的测试场景如下:
import * as request from "request-promise-native";
export class Publisher {
name : string = "IRocking Publisher";
async publishAsync(): Promise<PublisherResponse> {
var publisherResponse : PublisherResponse = PublisherResponse.EmptyResponse;
try {
let response = await request.get("https://jsonplaceholder.typicode.com/todos/1");
console.debug("Promise has been resolved. Result is:")
console.debug(response)
console.debug(response.userId)
publisherResponse = new PublisherResponse(file, this.name, true, "");
}
catch (error) {
publisherResponse = new PublisherResponse(file, this.name, false, error);
}
return Promise.resolve<PublisherResponse>(publisherResponse);
}
}
随附 Jest 测试如下:
test('Should publish a valid single document asynchronously', async () => {
// Arrange
let sut = new Publisher();
let expectedResponse = new PublisherResponse(documentToPublish, sut.name, true, "");
// Act
let actualResponse = await sut.publishAsync(new PublicationContext(), documentToPublish);
// Assert
expect(actualResponse).toEqual(expectedResponse);
});
当我运行测试时,我看到从服务返回的数据为
{
"userId": 1,
"id": 1,
"title": "delectus aut autem",
"completed": false
}
但是,如果我尝试访问诸如“userId”之类的数据属性,则会出现未定义的情况。 我错过了什么?
另外,除了这个请求中的 200 之外,我如何获得其他状态代码?
我需要使用反序列化从服务返回的 JSON 字符串
var todo = JSON.parse(response);
出于某种原因,我假设响应
let response = await request.get("https://jsonplaceholder.typicode.com/todos/1");
是一个对象,但底层类型是一个string 。 我用以下代码发现了这一点:
let propertyNames = Object.keys(response);
console.debug(propertyNames);
propertyNames.forEach((p, i) => {
console.debug(response[p])
})
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