Uncaught Exception not failing a test

• Operating System: Mac
• Cypress Version: 2.0.4
• Browser Version: Chrome Version 64.0.3282.186

Is this a Feature or Bug?

Bug… I think?

Current behavior:

Added a setTimeout(() => { throw new Error('Whoops!') }, 200) in my application code and ran a test that took a couple of seconds to run and it successfully completed.

Desired behavior:

I was under the impression that any uncaught exception will cause any test that’s running to fail. If I was wrong is there any way to ensure that the test fails? I tried adding the following code but the debugger never fired:

    cy.on('uncaught:exception', (err, runnable) => {
      debugger
    })
    cy.on('window:alert', (err, runnable) => {
      debugger
    })

How to reproduce:

• Add setTimeout(() => { throw new Error('Whoops!') }, 200) to any application code
• Run a test that take a couple of seconds to ensure that error gets thrown
• See the test succeed instead of fail.

Additional Info (images, stack traces, etc)

[alexindigo]

@brian-mann I have something similar, there is JS error happening when I do cy.go('back'), and cypress somehow ignores it, and continues as normal.

Is there anything else I can provide to help resolve the issue?

Thank you.

[andezzat]

@swathisham

https://github.com/cypress-io/cypress/issues/2487#issuecomment-461547038

I’m tracking this issue instead ☝️