Cypress can't connect to the browser when running Cypress 6.3

[giacaglia]

We've updated Cypress from version 6.0 to 6.3 and we are consistently getting a problem timing out in our CI machine. We are running Cypress on one of the Circle CI machines and we get the following message causing the response of the tests to fail even though they run:

Timed out waiting for the browser to connect. Retrying...
Warning: Cypress failed to connect to Chrome via stdio after 1 minute, 0 seconds. Falling back to TCP...
Connecting to Chrome via TCP was successful, continuing with tests.

This has happened when we updated Cypress from 6.1.0 to 6.3.0. This error is intermittent.

Current behavior

Seeing the following message when running cypress:

Desired behavior

Just have cypress connect to the browser

Test code to reproduce

We run the command cypress run --headless --browser chrome on this docker image: https://circleci.com/developer/images/image/cimg/node with a simple test.

We do have the latest version of jest-junit, i.e. version 12.0.0

Versions

Last Cypress version that it was working 6.1.0. We are running on a docker container created from the docker image: https://circleci.com/developer/images/image/cimg/node

[andrewmclagan]

Also seeing this

[jennifer-shehane]

This warning message about 'Timed out waiting for the browser to connect' is irrelevant to the error that is causing the test run to fail. The TCP connection was successful, so continued with your tests normally.

Then real error was encountered

TypeError: testcase.testcases[0]._attr.time.toFixed is not a function

This is throwing from mocha-junit-reporter. Are you using this reported in your tests? Can you provide a reproducible example.

[giacaglia]

This warning message about 'Timed out waiting for the browser to connect' is irrelevant to the error that is causing the test run to fail. The TCP connection was successful, so continued with your tests normally.

Then real error was encountered

TypeError: testcase.testcases[0]._attr.time.toFixed is not a function

This is throwing from mocha-junit-reporter. Are you using this reported in your tests? Can you provide a reproducible example.

We are using the standard reporter, so that is mocha-junit-reporter. The reporter does not work when Cypress does not connect to the browser, and that causes the mocha-junit-reporter to fail. So there are 2 issues here:

1. Cypress 6.3 is not connecting to the browser in some instances
2. The standard reporter, mocha-junit-reporter, fails when Cypress does not connect to the browser

So what I think is happening is that Cypress 6.3 has a problem connecting to the browser in some instances and the mocha-junit-reporter can't use the results from Cypress when that happens

[giacaglia]

@jennifer-shehane That is the same problem as others are seeing here: #14701

[giacaglia]

Seems to be fixed on version 6.4.0: https://github.com/cypress-io/cypress/releases/tag/v6.4.0

Trying it out

[eduuuardo]

Oh no, I just upgraded to 6.4.0 on my local and now I only have this error.

[giacaglia]

This fixed it for me

[giacaglia]

Upgrade to 6.4.0