javascript - 如何使用 Chai 断言查看 Promise 是否包含特定数据

Question

我已经开始使用 Chakram Rest API 测试框架，它利用了 Chai 断言库。在我下面的代码中，Chakram.get 返回一个 Promise。我似乎无法弄清楚如何查看此 promise 是否包含我正在寻找的内容。例如，Chakram.get 应该返回以下字符串:

[
 "category1",
 "category2"
]

我只是想看看它是否包含“category1”。

var chakram = require('chakram'),
    expect = chakram.expect;

process.env.NODE_TLS_REJECT_UNAUTHORIZED = '0';

describe("Categories", function() {
    it("should return the list of categories for devices that are installed in the project", function () {
        var response = chakram.get("https://192.168.2.2/category");
        expect(response).to.have.status(200);
        expect(response).not.to.have.header('non-existing-header');
        expect(response).to.contain('category1');
        return chakram.wait();
    });
});

如您所见，我尝试了上面的 to.contain 行，但出现以下异常。我认为这是因为 Chai 不喜欢对象类型。不确定我是否需要将 Promise 转换为不同的对象类型？如果是，怎么办？

TypeError: obj.indexOf is not a function
  at include (/Users/acme/node_modules/chai/lib/chai/core/assertions.js:228:45)
  at /Users/acme/node_modules/chakram/node_modules/chai-as-promised/lib/chai-as-promised.js:304:26
  at _fulfilled (/Users/acme/node_modules/chakram/node_modules/q/q.js:834:54)
  at self.promiseDispatch.done (/Users/acme/node_modules/chakram/node_modules/q/q.js:863:30)
  at Promise.promise.promiseDispatch (/Users/acme/node_modules/chakram/node_modules/q/q.js:796:13)
  at /Users/acme/node_modules/chakram/node_modules/q/q.js:604:44
  at runSingle (/Users/acme/node_modules/chakram/node_modules/q/q.js:137:13)
  at flush (/Users/acme/node_modules/chakram/node_modules/q/q.js:125:13)

Answer 1

我认为您正在寻找 response.body

expect(response.body).to.contain('category1');

这是一个完整的例子:

  it("should support sequential API interaction", function () {
    return chakram.get("url")
    .then(function (response) {
      expect(response.body).to.contain("thing");
    });
  });