[Question] Wait for response.ok()

I’m not sure if this already exist. I tried waitForResponse, but didn’t get the desired result.

For my tests I need to run a dev-server, which takes up to 15 seconds to start. It would be great if there was a native way to poll a server for response.ok() to be truthy within a set interval.

As a workaround, I’m using the following code

const response = await waitForServer(page, url)

...

async function waitForServer(page, url, timeout = 20000) {
  const startTime = Date.now()
  while (Date.now() - startTime < timeout) {
    try {
      const response = await page.goto(url)
      if (response.ok())
        return response
      await new Promise(resolve => setTimeout(resolve, 100))
    } catch (err) { }
  }
  throw new Error('Server never started')
}

[jakobrosenberg]

I think there might be a misunderstanding.

I’m looking for a Playwright native function like page.waitForResponse, which waits for x seconds for a 2xx response.

[aslushnikov]

For my tests I need to run a dev-server, which takes up to 15 seconds to start. It would be great if there was a native way to poll a server for response.ok() to be truthy within a set interval.

@jakobrosenberg In ideal world, server would notify clients when it’s up and running - but sometimes there’s no way to get perfect behavior…

The workaround that you use is not that bad for what it does. Alternatively, I’d consider firing HTTP requests from node.js itself since it’s way more lightweight than browser page navigation.