Cypress.automation('remote:debugger:protocol') command started failing in Cypress 7.3.0 #17723

c32hedge · 2021-08-12T23:00:51Z

Current behavior

Starting in 7.3.0, the test code below (mostly copied from https://www.cypress.io/blog/2020/11/12/testing-application-in-offline-network-mode/) throws this error:

CypressError: `cy.then()` timed out after waiting `4000ms`.

Your callback function returned a promise that never resolved.

The callback function was:

() => Cypress.automation('remote:debugger:protocol', {
      command: 'Network.emulateNetworkConditions',
      params: {
        offline: true,
        latency: -1,
        downloadThroughput: -1,
        uploadThroughput: -1
      }
    })
    at https://www.cypress.io/__cypress/runner/cypress_runner.js:136167:24
From previous event:
    at Context.thenFn (https://www.cypress.io/__cypress/runner/cypress_runner.js:136166:13)
    at Context.then (https://www.cypress.io/__cypress/runner/cypress_runner.js:136597:21)
    at Context.<anonymous> (https://www.cypress.io/__cypress/runner/cypress_runner.js:151455:21)
From Your Spec Code:
    at Context.eval (https://www.cypress.io/__cypress/tests?p=cypress/integration/spec.js:133:9)

Desired behavior

The test should run without error.

Test code to reproduce

Set the baseUrl configuration key (e.g. "https://www.cypress.io") and run the following spec. I can reproduce without setting the baseUrl but it's a little more complicated and I think this is better as a MWE.

describe('page', () => {
  it('tries to go offline', () => {
    cy.log('**go offline**')
    .then(() =>
      Cypress.automation('remote:debugger:protocol', { command: 'Network.enable' })
    )
      .then(() => 
        Cypress.automation('remote:debugger:protocol', {
          command: 'Network.emulateNetworkConditions',
          params: {
            offline: true,
            latency: -1,
            downloadThroughput: -1,
            uploadThroughput: -1
          }
        })
      );
    cy.visit('/');
  });
});

Cypress Version

7.3.0

Other

I encountered this when attempting to update to the latest version of Cypress, but traced it back to 7.3.0. Version 7.2.0 runs without error.

It looks like at least a couple other people have encountered this based on the comments on that blog post. I found that modifying the callback in the second then to not return anything did allow my tests to get further, only to hang indefinitely at random places in my test file so, as I suspected, that isn't a real solution.

The text was updated successfully, but these errors were encountered:

InfiniteTape · 2021-08-19T17:38:15Z

+1 to this. I'm seeing the same problem.

szhong-becls · 2021-08-23T02:25:15Z

The same regression issue in 8.0.0

c32hedge · 2021-08-24T13:27:55Z

@jennifer-shehane did this get lost? It's been two weeks with no response 😦

c32hedge · 2021-08-25T16:56:15Z

@jennifer-shehane Gleb pointed me to this Cypress recipe on the Cypress Gitter: https://github.com/cypress-io/cypress-example-recipes/blob/master/examples/server-communication__offline/cypress/integration/offline-spec.js

Which is almost identical to my code except for the use of braces and explicit return statements for the arrow function bodies. Yet, I was able to use the MWE above in a cypress-test-tiny fork and trace the failure back to 7.3.0 as described.

I realize this is a bit of an obscure feature, but you have blogs and recipes that reference it, and multiple people, both here and in the comments on the blog post, are struggling getting code referenced in those blogs/recipes to work in newer versions of Cypress. Could you at least confirm whether you can reproduce the error I'm seeing?

szhong-becls · 2021-08-26T07:09:55Z

According to my investigation, this issue may be injected by this commit in socketio/engine.io-client repo.
It supports a listen to the "offline" event feature in version 5.0.0 (2021-03-10).

The problemic code is as follows:

+ if (this.hostname !== "localhost") {
+   this.offlineEventListener = () => {
+     this.onClose("transport close");
+   };
+   addEventListener("offline", this.offlineEventListener, false);
+ }

The socket is closed after sending CDP command: { "command": "Network.emulateNetworkConditions", "parameters": { "offline": true } }. Then the command response is never received and Cypress.automation('remote:debugger:protocol', { ... }) is timeout.

raultm · 2021-09-09T17:37:58Z

any idea or workaround? Can i get an older version of cypress to make it work?

It only fails when is not localhost, in fact i can go offline but i cant recover from this status to the online status

#17723 (comment)

svenjungnickel · 2021-09-16T06:19:15Z

A quick workaround would be to use a version before cypress 7.0.0. As I stated here cypress-io/cypress-example-recipes#721 (comment) I got it successfully running in version 6.9.1.

szhong-becls · 2021-09-16T06:33:08Z

Another "work around". With the fact that Network.emulateNetworkConditions and offline: true did set the Chrome network to offline, but Cypress cannot receive the command execution result. So we can tell Cypress to ignore this particular error, and continue to run our test specs.

cy.on('fail', e => {
  if (
    e.name === 'CypressError'
    && e.message.includes('timed out')
    && e.message.includes('remote:debugger:protocol')
    && e.message.includes('Network.emulateNetworkConditions')
    && e.message.includes('offline: true')
  ) {
    // do not fail the test
    return false;
  }
});

cy.log('**go offline**')
  .then(() =>
    Cypress.automation('remote:debugger:protocol', { command: 'Network.enable' })
  )
  .then(() =>
    Cypress.automation('remote:debugger:protocol', {
      command: 'Network.emulateNetworkConditions',
      params: {
        offline: true,
        latency: -1,
        downloadThroughput: -1,
        uploadThroughput: -1
      }
    })
  );

svenjungnickel · 2021-09-16T06:55:56Z

@szhong-becls your workaround did not work for me, unfortunately.

matthew-nash-cko · 2021-09-24T08:22:03Z

Any update on this? My tests are also failing where this functionality is required

myasul · 2021-10-20T12:20:50Z

I am also experiencing this issue on our project when I upgraded to v8.6.0. Is there a provided solution or an ETA for a fix? We cannot upgrade till this is fixed. 😭

lorenzofidalgo · 2021-11-19T10:38:37Z

I am also suffering with this issue.
I have confirmed Cypress 6.9.1 is still working properly. I have tested Cypress 6.9.1 against Chrome 96 and Electron 87 (working properly in both cases).
Cypress 8.7.0 fails, Cypress 9.0.0 fails. So, or we go back to 6.9.1, or...

maayanzrihann · 2021-11-22T15:53:34Z

Same for me :(
Cannot upgrade cypress version because of this issue

Gu7z · 2021-11-24T15:29:29Z

Same! 👀

ughunoup · 2021-12-16T15:44:29Z

Same, still not working in 9.1.1

Do anyone know alternative solution to simulate browser offline mode?

weilu · 2022-01-19T20:14:27Z

Same here. Stuck with 6.9.1 because of this issue

distante · 2022-03-21T12:30:05Z

Another "work around". With the fact that Network.emulateNetworkConditions and offline: true did set the Chrome network to offline, but Cypress cannot receive the command execution result. So we can tell Cypress to ignore this particular error, and continue to run our test specs.

cy.on('fail', e => {
  if (
    e.name === 'CypressError'
    && e.message.includes('timed out')
    && e.message.includes('remote:debugger:protocol')
    && e.message.includes('Network.emulateNetworkConditions')
    && e.message.includes('offline: true')
  ) {
    // do not fail the test
    return false;
  }
});

cy.log('**go offline**')
  .then(() =>
    Cypress.automation('remote:debugger:protocol', { command: 'Network.enable' })
  )
  .then(() =>
    Cypress.automation('remote:debugger:protocol', {
      command: 'Network.emulateNetworkConditions',
      params: {
        offline: true,
        latency: -1,
        downloadThroughput: -1,
        uploadThroughput: -1
      }
    })
  );

This workaround worked for my with cypress open but hangs for cypress run

xdubx · 2022-08-09T15:28:06Z

same problem on "cypress": "^9.6.1"

weilu · 2022-10-27T19:24:38Z

Can we please get this working? None of the workarounds above works anymore. I hate to be stuck with version 6.9 because of this

snefa · 2022-11-24T12:42:42Z

We were also going offline and online in tests and are missing it... +1 here.

asmirnov-style · 2023-01-05T22:07:32Z

Year 2023
Cypress v10.3.1
Hi there!👋
Issue with going back online still exist.

robertbenthompson · 2023-01-10T15:16:30Z

Hope everyone had a happy holiday season!
As of v12.3.0 looks like the remote:debugger:protocol still fails to go back online.
Can anyone else confirm?

Shnrqpdr · 2023-01-23T13:38:42Z

Hope everyone had a happy holiday season! As of v12.3.0 looks like the remote:debugger:protocol still fails to go back online. Can anyone else confirm?

Yes, unfortunately this issue stills.
Any workaround that worked for you?

AlanCodega · 2023-02-22T13:45:58Z

Cypress 12.6.0, still has the same issue!
How do you guys test offline/online in Cypress??

Shnrqpdr · 2023-03-03T20:34:03Z

Cypress 12.6.0, still has the same issue! How do you guys test offline/online in Cypress??

Pls check my answer (the final answer in the issue discussion) at #235 (i couldn't cite the issue), that workaround worked for me.

xdubx · 2023-03-06T21:48:03Z

Cypress 12.6.0, still has the same issue! How do you guys test offline/online in Cypress??

@AlanCodega mock all requests

asmirnov-style · 2023-03-06T21:57:54Z

Kind a way for simulate OFFLINE (while Cypress team fixing 4 y.o bug)

` goOfflineIntercept() {
        cy.log("**go offline**").then(() => {
            cy.intercept(
                {
                    method: "GET",
                    url: "*",
                },
                {
                    statusCode: 404, // if you like and need it
                }
            );
        });
    }

goOnlineIntercept() {
        cy.log("**go online**").then(() => {
            cy.intercept("GET", "*", (req) => {
                req.continue();
            });
        });
    }`

KaiVandivier · 2023-03-15T16:56:06Z

Thanks @asmirnov-style!

I adapted mine a bit too:

const goOffline = () => {
    cy.log('**go offline**')
        // stub every request with a StaticResponse to simulate network error
        .then(() => cy.intercept('*', { forceNetworkError: true }))
        .then(() =>
            cy.window().then((win) => win.dispatchEvent(new Event('offline')))
        )
}
const goOnline = () => {
    cy.log('**go online**')
        // go back to normal network behavior
        .then(() => cy.intercept('*'))
        .then(() =>
            cy.window().then((win) => win.dispatchEvent(new Event('online')))
        )
}

buffcode · 2023-05-24T20:01:04Z

Modifying the real onLine attribute, tested in Cypress 12.11.0:

// go offline
cy.window().then((win) => {
  cy.stub(win.navigator, 'onLine').value(false);
  cy.wrap(win).trigger('offline');
});

// go online
cy.window().then((win) => {
  cy.stub(win.navigator, 'onLine').value(true);
  cy.wrap(win).trigger('online');
});

megos · 2024-02-21T04:15:46Z

Is this issue fixed in v13?

I tried this test and the results are as follows:

v12.17.4: failed
v13.0.0: passed

raultm mentioned this issue Sep 16, 2021

Any idea why the offline (server-communication__offline) tests only work when run against localhost? cypress-io/cypress-example-recipes#721

Closed

jhnns mentioned this issue Dec 16, 2021

Network automation to emulate offline mode only works with DevTools open #9063

Closed

jhnns mentioned this issue Jan 11, 2022

Simulate offline mode #235

Open

cypress-bot bot added the stage: backlog label Apr 29, 2022

LekoArts mentioned this issue Jun 15, 2022

chore: Upgrade Cypress to v9 gatsbyjs/gatsby#35730

Merged

This was referenced Sep 20, 2022

Going offLine and onLine not working in cypress #23849

Closed

Testing offline behaviour causes tests to become unresponsive #23889

Closed

DNR800 mentioned this issue Oct 20, 2022

feat: online/offline status messaging dhis2/ui#1163

Merged

3 tasks

david-mcafee mentioned this issue Feb 2, 2023

feat(data): add Microsoft Edge testing; update WebKit Docker image aws-amplify/amplify-js#10917

Merged

3 tasks

nagash77 added the prevent-stale mark an issue so it is ignored by stale[bot] label Apr 3, 2023

emilyrohrbough added the type: bug label Apr 6, 2023

nagash77 added existing workaround E2E Issue related to end-to-end testing Triaged Issue has been routed to backlog. This is not a commitment to have it prioritized by the team. labels May 26, 2023

jennifer-shehane removed the stage: backlog label Nov 28, 2023

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Cypress.automation('remote:debugger:protocol') command started failing in Cypress 7.3.0 #17723

Cypress.automation('remote:debugger:protocol') command started failing in Cypress 7.3.0 #17723

c32hedge commented Aug 12, 2021

InfiniteTape commented Aug 19, 2021

szhong-becls commented Aug 23, 2021

c32hedge commented Aug 24, 2021

c32hedge commented Aug 25, 2021

szhong-becls commented Aug 26, 2021

raultm commented Sep 9, 2021

svenjungnickel commented Sep 16, 2021 •

edited

szhong-becls commented Sep 16, 2021

svenjungnickel commented Sep 16, 2021

matthew-nash-cko commented Sep 24, 2021

myasul commented Oct 20, 2021

lorenzofidalgo commented Nov 19, 2021

maayanzrihann commented Nov 22, 2021

Gu7z commented Nov 24, 2021

ughunoup commented Dec 16, 2021

weilu commented Jan 19, 2022

distante commented Mar 21, 2022

xdubx commented Aug 9, 2022

weilu commented Oct 27, 2022 •

edited

snefa commented Nov 24, 2022

asmirnov-style commented Jan 5, 2023

robertbenthompson commented Jan 10, 2023

Shnrqpdr commented Jan 23, 2023

AlanCodega commented Feb 22, 2023

Shnrqpdr commented Mar 3, 2023

xdubx commented Mar 6, 2023

asmirnov-style commented Mar 6, 2023 •

edited

KaiVandivier commented Mar 15, 2023

buffcode commented May 24, 2023

megos commented Feb 21, 2024 •

edited

Cypress.automation('remote:debugger:protocol') command started failing in Cypress 7.3.0 #17723

Cypress.automation('remote:debugger:protocol') command started failing in Cypress 7.3.0 #17723

Comments

c32hedge commented Aug 12, 2021

Current behavior

Desired behavior

Test code to reproduce

Cypress Version

Other

InfiniteTape commented Aug 19, 2021

szhong-becls commented Aug 23, 2021

c32hedge commented Aug 24, 2021

c32hedge commented Aug 25, 2021

szhong-becls commented Aug 26, 2021

raultm commented Sep 9, 2021

svenjungnickel commented Sep 16, 2021 • edited

szhong-becls commented Sep 16, 2021

svenjungnickel commented Sep 16, 2021

matthew-nash-cko commented Sep 24, 2021

myasul commented Oct 20, 2021

lorenzofidalgo commented Nov 19, 2021

maayanzrihann commented Nov 22, 2021

Gu7z commented Nov 24, 2021

ughunoup commented Dec 16, 2021

weilu commented Jan 19, 2022

distante commented Mar 21, 2022

xdubx commented Aug 9, 2022

weilu commented Oct 27, 2022 • edited

snefa commented Nov 24, 2022

asmirnov-style commented Jan 5, 2023

robertbenthompson commented Jan 10, 2023

Shnrqpdr commented Jan 23, 2023

AlanCodega commented Feb 22, 2023

Shnrqpdr commented Mar 3, 2023

xdubx commented Mar 6, 2023

asmirnov-style commented Mar 6, 2023 • edited

KaiVandivier commented Mar 15, 2023

buffcode commented May 24, 2023

megos commented Feb 21, 2024 • edited

svenjungnickel commented Sep 16, 2021 •

edited

weilu commented Oct 27, 2022 •

edited

asmirnov-style commented Mar 6, 2023 •

edited

megos commented Feb 21, 2024 •

edited