Question

鉴于：Express app，AVA，supertest

何时：我在测试中测试生成的html并且测试用例失败

然后：AVA在控制台中显示整个响应对象，这会减慢对问题的分析

测试示例：

test('Positive case: book is found in /api/v1/books/1', async (t) => {
  t.plan(2)
  const response = await request(app).get('/api/v1/books/1')
  t.is(response.status, 200)
  const expectedBook = '<h3>Book 1</h3>'
  t.truthy(response.res.text.match(expectedBook), 'Book title is not found')
})

控制台中的输出示例

/express-project/src/books/index.test.js:22

   21:   const text = response.res.text
   22:   t.truthy(response.res.text.match(expectedBook), 'Book t…
   23:   })

  Book title is not found

  Value is not truthy:

  null

  response.res.text.match(expectedBook)
  => null

  expectedBook
  => '<h3>Book 2</h3>'

  response.res.text
  => '<!DOCTYPE html><html><head><title>BOOK</title><link rel="stylesheet" href="/stylesheets/style.css"></head><body><h1>BOOK</h1>
<h3>Book 1</h3><h4></h4></body></html>'

  response.res
  => IncomingMessage {
    _consuming: false,
    _dumped: false,
    _events: {
      close: Function bound emit {},
      data: [
        Function {},
        Function {},
        Function bound emit {},
      ],
      end: [
        Function responseOnEnd {},
        Function {},
        Function bound emit {},
      ],
      error: [
        Function bound onceWrapper { … },
        Function bound emit {},
      ],
    },
    _eventsCount: 4,
    _maxListeners: undefined,
    _readableState: ReadableState [
      awaitDrain: 0,

    ..........  VERY LONG LIST WITH HUNDREDS OF LINES
    SO HAVE TO SCROLL UP AND UP AND UP BEFORE YOU GET TO THE POINT

Answer 1

Ava试图帮助调试失败的测试，以便Ava分别放入控制台

response.res.text
response.res
响应

它在控制台中生成数百甚至数千行

因此解决方案非常简单 - 使用中间变量进行断言

而不是

t.truthy(response.res.text.match(expectedBook), 'Book title is not found')

使用

const text = response.res.text
t.truthy(text.match(expectedBook), 'Book title is not found')

如何在测试失败时阻止ava显示长对象

1 个答案: