Is there a way to obtain a unique response in TestCafe RequestMock?

With Testcafe, I have the capability to simulate the response of a request successfully.

I am interested in setting up a caching system for all GET/Ajax requests.
The current setup functions properly when the URL is already cached, but it fails to provide a response for URLs not found in the cache.

I suspect that this issue arises because I may not be calling res.setBody() for those URLs not present in the cache.

export const requestMock = RequestMock()
  .onRequestTo({ method: 'GET', isAjax: true })
  .respond(async (req: Request, res: Response & { setBody: Function }) => {
    const url: string = req.url
    try {
      const body: string = await cache.getItem(url)
      if (body) {
        res.setBody(body)
      }      
    } catch (error) {
      print.error(error)
    }
  })

Is there a way to access the original Response.body so that I can use res.setBody(originalBody)?

typescripttestingautomated-testse2e-testingtestcafe

Answer №1

In order to handle this, your code must retrieve the data initially and store it in a cache for future use. However, it's important to note that this process is not mocking; it's simply caching.

Instead of relying on caching, you may want to consider using actual mocks. You can save responses from requests in JSON files (or any other suitable format) and provide the contents of these files when the tested application attempts to make a request to a specific URL.

If you decide to stick with the caching approach, your code should verify if there is a cached response for the requested URL within the respond callback. If a cached response exists, the code should return the body from the cache as it currently does. If no cached response is found, the code should proceed to make the request, store the response in the cache, and then return the response.

To send the request, you can use the fetch API in a browser or utilize a library like axios in the Node.js runtime.

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